Author Topic: Terry's "Old Blue, the Flipping F2" restification thread.  (Read 4830 times)

0 Members and 2 Guests are viewing this topic.

Offline Terry in Australia

  • Really Old Timer ...
  • *******
  • Posts: 33,317
  • So, what do ya wanna talk about today?
Terry's "Old Blue, the Flipping F2" restification thread.
« on: January 26, 2023, 03:37:40 PM »
OK, here we go again. As you all know, F's definitely aren't my favourite CB750's (particularly the F/F1 which I bought new in 1978, they were so reviled here in Oz that the big Honda shop in the city couldn't sell them, so when the F2 was released they heavily discounted the F/F1, and as a strapping young 18 year old, it was all I could afford, even though I really wanted a Kawasaki Z1) but I'm not just biased towards the F's, I detest the K7/8 as well, even though I know they were all good bikes. To me, they just don't appeal.

So why did I buy it? It'll be a flip bike, I got it cheap (not 500 bucks cheap like in the US or Canada, but $3500 AUD was cheap for here where poorly restored K2's sell like hot cakes for 15 grand) and intend to spend the absolute minimum on it, and will sell it this year, along with as many of my other bikes that I don't really need to take with me to the grave.

The back story is always interesting, this was a police bike originally. The seller, Peter, bought it in the 80's ('82 we think, but he's going to hunt around for the original paperwork to confirm) so he thinks it would have had one previous owner between the cops selling it off, and him buying it in "as new" condition from a car yard. He'd just sold his K2 and was going through sellers remorse when he saw the blue F2, so he bought it, and rode it every day (was his only source of transport) until 1991, when he parked it in his garage. This is Pete in the pic beside my little truck.

F2 Wednesday 25 January 2023 2 by Terry Prendergast, on Flickr

He'd gotten married and bought a house, and the bike stayed in a corner of the garage, pretty much forgotten until Pete's son, Al, offered to sell it on FB for him. I was lucky because they'd advertised it late at night, and I start work at 6am, so was trawling thru FB marketplace when I saw it for a pretty cheap (not super cheap, but about half of what I reckon I can get for it running, with a tidy up) so shot him a message that I'd take it for the advertised price, and coincidentally I'd driven my truck to work, as I had to collect another FB bargain, a big old air compressor, and Pete only lives about 8 miles from where I had to go, so I said I could collect the bike right away. He called me and we had a chat, he texted me his address and I drove over and picked it up.

Pete's one of these really fastidious types, the polar opposite of me really. Even though he hadn't ridden it he'd gone out to the garage every couple of months and started it until it ran out of fuel, which is what probably saved the tank, it's dent free, and rust free, unlike most F tanks that leak like sieves when stored with fuel in them. When he couldn't start it any more he'd kick it over a few times every few months to stop it locking up. He'd had it under a tarp and was horrified when he lifted the seat up and realised that the seat base was a rusty mess. He thought it was the tarp that caused it, but I explained that it would have been caused by the battery gassing off under it. Anyway, he found a "take-off" seat in the US, the seller had fitted one of those fugly "King and queen" butt buckets, and had hung up the original seat, so Pete installed it into his ducktail, but never put it back on the bike in case it rusted out again, instead he kept it in his spare bedroom.

Likewise, he wanted to replace the cop speedo with a standard speedo, so he bought a NOS ND speedo for it from the US, plus the rubber gasket and hardware, that he threw in with the bike. The original tail light base was rusty so he bought a NOS assembly as well. Also he included the original owners manual and tool kit, which is always a bonus, plus the big arse  police issue crash bars, and some other stuff I haven't looked at yet.

F2 Wednesday 25 January 2023 5 by Terry Prendergast, on Flickr

He gave me a brand new Clymer manual and an interesting book on restoring Honda fours.

F2 Wednesday 25 January 2023 9 by Terry Prendergast, on Flickr

Anyhoo, I transferred the cash into his account, and took off. It's an unofficial long weekend this weekend, Thursday was "Australia Day" (well, until all of the various small, but loud minority groups, the hippies and the intellectuals get it changed, or cancelled completely) and being a Thursday everyone was taking Friday off. The downside was that traffic from Pete's place to mine was diabolical, and by the time I got home in my little non-airconditioned truck, I was sweating like a rapist.

Luckily the wife wasn't home, so I was able to unload it and hide it, but of course, unloading a 500 pound motorcycle with no brakes on your own is about as much fun as being on death row, but somehow I got it off without damaging it, or killing myself. It did give me some incentive to finish building my motorcycle loading device, which I'll start again shortly, and was good to give me an idea for mounting the electric winch that I bought, off to one side with an arrangement of pulleys on a small bracket at the front of the tub, because there's not quite enough room centre front of the tub to allow the winch to be mounted there for a big bike, with the tailgate closed. I've got an old home gymnasium weight machine rotting in my back yard that I've "inherited" from my musclebound son to provide the necessary hardware and some handy pieces of steel tube.

F2 Wednesday 25 January 2023 7 by Terry Prendergast, on Flickr

Of course, I should have stripped, inspected and reassembled the whole bike before I attempted to start it after it's sat for 32 years, but instead I threw a battery in it, dumped a gallon of fuel with some fuel system cleaner into the tank, reattached the fuel hose when it ran out over the engine and driveway (oops) and kicked the engine over a few times with the ignition off to pump some oil up to the head, then turned the key on, and cranked it, and eventually, it fired right up! Woohoo! The throttle cables are frozen so I cranked on the idle screw so that it would actually run and not just fire, and of course the exhaust is off the bike, so I could see that it was running on all four by the flames shooting out of each port. I only ran it for a few seconds because the oil light stayed on.

I'm assuming that the oil pressure switch is stuck, but didn't want to risk damaging it, so today or tomorrow I'll drop the oil, and the oil pan, pull the pump, clean the screen, prime the pump, reinstall it and install an oil pressure gauge and a new filter and oil, fix the exhaust (weld up a rust hole near the collector) or try to install a nice English Marshall "Deep Tone" exhaust (off a DOHC 750, I think?) that I've had hanging up in my garage for a few years, and fire it up again. I'd forgotten to put some ginger beer in the fridge so I poured myself several whiskies, and concluded that it was indeed a pretty good day.

F2 Wednesday 25 January 2023 9a by Terry Prendergast, on Flickr

I'm taking the Moto Guzzi Californnia 3 that I've been working on for a ride today, but when I get home (and providing that replacing the coils has fixed the erratic running I experienced last weekend) I'll get back to the blue F2 and drop the oil and have a look in the pan for any nasties, hopefully it'll be good. Peter did say that it was starting to blow some smoke when he originally parked it so the engine might need to come out, but hopefully some fresh oil and a decent ride will sort it, the oil that's in it was pretty black.

Luckily I have a professionally reconditioned F2 head here so if it's suffering from the time honoured F2 valve/guide issue I'll be able to fix it, but if I don't need to, then even better. The bike has done around 50,000 miles so it could well need a freshen up, but I'm hoping that I don't have to, the engine's never been out of the frame, and that's the way I'd like to keep it. More soon. ;D

F2 Wednesday 25 January 2023 8 by Terry Prendergast, on Flickr 
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline newday777

  • Really Old Timer ...
  • *******
  • Posts: 5,253
  • Avatar is my 76 K6 in Colorado w/Cody on back 1980
Re: Terry's "Old Blue, the Flipping F2" restification thread.
« Reply #1 on: January 26, 2023, 04:07:25 PM »
Like you Terry,  I didn't care for the F models either, they just weren't my cup of tea.
I hope this project goes smoothly, fast and flips quickly for you.
Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline bryanj

  • Really Old Timer ...
  • *******
  • Posts: 14,013
  • CB500 Number 1000036
Re: Terry's "Old Blue, the Flipping F2" restification thread.
« Reply #2 on: January 26, 2023, 04:12:47 PM »
If the guides are still good at 50,000 its a unicorn and needs keeping
Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!

Offline BenelliSEI

  • Really Old Timer ...
  • *******
  • Posts: 9,913
  • 1969 cb750
Re: Terry's "Old Blue, the Flipping F2" restification thread.
« Reply #3 on: January 26, 2023, 04:19:44 PM »
It certainly looks complete. Nice bits came with it too. Good luck! J.

Offline grcamna2

  • Not a
  • Really Old Timer ...
  • *******
  • Posts: 15,139
  • I love to restore & travel. Keep'em Going Strong !
Re: Terry's "Old Blue, the Flipping F2" restification thread.
« Reply #4 on: January 26, 2023, 05:19:30 PM »
Terry,over there in Oz' which year was the model F2 sold in:1977' ?
75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Online seanbarney41

  • not really that much younger than an
  • Really Old Timer ...
  • *******
  • Posts: 10,835
Re: Terry's "Old Blue, the Flipping F2" restification thread.
« Reply #5 on: January 26, 2023, 06:42:47 PM »
If the guides are still good at 50,000 its a unicorn and needs keeping
yeah, that's what I was thinking..."50k?!, it's been smoking like a 2 stroke for the last 20k?"
If it works good, it looks good...

Offline Tintop

  • Old Timer
  • ******
  • Posts: 3,965
Re: Terry's "Old Blue, the Flipping F2" restification thread.
« Reply #6 on: January 26, 2023, 07:04:31 PM »
Another interesting project to follow here in the snow covered north.  If you luck out on the head it has the look of a quick flip.
1977 CB550/4 Cafe - Speed Warrior / BOTM 03/11
1980 CB750F (project)
Whittaker GBF Vintage Racing Sidecar (XS750 power) - ITG / 151's / CMR Racing Products (SOLD)
1976 CB400 SS - stock / BOTM 04/11 (SOLD)
1973 CB750 K - basket case (SOLD)
77 CB550 Cafe build
550/750 Filter Thread
Sidecar Rebuild Thread

Offline Terry in Australia

  • Really Old Timer ...
  • *******
  • Posts: 33,317
  • So, what do ya wanna talk about today?
Re: Terry's "Old Blue, the Flipping F2" restification thread.
« Reply #7 on: January 26, 2023, 07:52:46 PM »
Thanks guys, it’s my 4th F2, and condition is really dependent on maintenance, my first F2 was well cared for, had done the same mileage and didn’t smoke at all, the second one was absolutely flogged to death and needed a total rebuild, the third was fine, so it’ll be interesting to see what this one is like. It didn’t blow any smoke when I fired it up on Thursday but I only ran it for a few seconds. No biggie either way as I have a perfect head for it. ;D
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline PeWe

  • Really Old Timer ...
  • *******
  • Posts: 15,569
  • Bike almost back to the 70's 2015
Re: Terry's "Old Blue, the Flipping F2" restification thread.
« Reply #8 on: January 27, 2023, 03:22:11 AM »
This bike will be interesting.
It look good and will probably look better after clean, polish all shiny parts and painted, followed by wax.

If guides are still good, it might be oil related.
Bike has got a good oil during the years.
CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline bryanj

  • Really Old Timer ...
  • *******
  • Posts: 14,013
  • CB500 Number 1000036
Re: Terry's "Old Blue, the Flipping F2" restification thread.
« Reply #9 on: January 27, 2023, 09:22:01 AM »
All the F2's i worked on in UK needed guides by 20,000, which in most cases was over a year so out of warantee, i took a shop one to the IOM TT and it was doing 350 miles to the pint on the way over but after mad sunday, leaving the plod at creg in the biggest blue cloud you ever saw after about a mile downhill on the overun dropped to 250, would only do just over 100mph as well
Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!

Offline Terry in Australia

  • Really Old Timer ...
  • *******
  • Posts: 33,317
  • So, what do ya wanna talk about today?
Re: Terry's "Old Blue, the Flipping F2" restification thread.
« Reply #10 on: January 27, 2023, 02:36:08 PM »
Yesterday was a magnificent day so I jumped on the Moto Guzzi for ride #5 to see if replacing the coils fixed the issue, and am happy to report that it ran like a Moto Guzzi should, and I had a really enjoyable ride. I sent Rob a message to come pick it up, and he rode his horrible old Royal Enfield 350 over to my place and rode the Guzzi home. As much as I know I should respect professional motorcycle mechanics, I still can't believe that a Moto Guzzi specialist could miss  something as simple as a bad coil, and give the bike back to him in the same condition, twice, after doing lots of other expensive and unnecessary work, and charging him a total of $4250! Rob and Dave are 'rapt with it now, and Dave wants me to do the servicing on his two other Guzzi's and his KTM from now on.

Anyway after Rob left, I dropped the oil and filter off the F2. I was happy that I'd collected 3.4 litres of old oil, some bikes I've dragged home were lucky to have half that. There was no "sludge" either, as you'd expect from a bike that's been sitting in a dry garage for so long, just a little bit of crap in one spot in the pan.

F2 Friday 27 Jan 2023 4 by Terry Prendergast, on Flickr

The oil pump's screen was very good too, with just a little bit of crap in it, so I pried the screen off and pushed the debris out before priming and reinstalling it.

F2 Friday 27 Jan 2023 3 by Terry Prendergast, on Flickr

I had a poke around before I reinstalled the pump and it was good to not see any rust inside, the primary chains looked good too. I reinstalled the pan and installed a new filter, and laughed that Peter had installed the spring on the wrong side of the filter, and of course the washer was nowhere to be found, so I bored a 3/4" stainless washer to 20mm and installed it all back the right way. I found a jug of 10W-40 Penrite motorcycle oil and filled it, and as it was around 8pm and I was covered in crap I decided  that I'd let the oil settle overnight and come back today to do some more. I've been selling some more bike parts so need to go to the post office to send them off, then I'm going to buy some brazing rods to fill a hole in the OEM header which may well come up nicely with a clean and polish, if that Marshall system doesn't fit.

More soon. ;D
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline BenelliSEI

  • Really Old Timer ...
  • *******
  • Posts: 9,913
  • 1969 cb750
Re: Terry's "Old Blue, the Flipping F2" restification thread.
« Reply #11 on: January 27, 2023, 02:42:01 PM »
Terry..... as usual, 1 “Terry Day” equals 1 week for the rest of us!

Offline RAFster122s

  • I feel like a really really
  • Really Old Timer ...
  • *******
  • Posts: 12,365
  • SOHC4 member # 2605
Re: Terry's "Old Blue, the Flipping F2" restification thread.
« Reply #12 on: January 27, 2023, 09:27:16 PM »
So, did you leave the Martek coils on the Guzzi or find another pair for it?
Good bit of work Terry! Well done.
Glad the F2 is turning out to be as you suspected. Are you going to try to check out the cam with borescope poking about or just cleck the lash and do a 3k service before firing it up again after going through the things you have already done to check it out and ensure it is ready for positive experience returning it to running condition? How do the coil wires look? It's been stored inside, right. That will definitely be gentler than even a short stay of even 6 months outside.
David- back in the desert SW!

Offline Terry in Australia

  • Really Old Timer ...
  • *******
  • Posts: 33,317
  • So, what do ya wanna talk about today?
Re: Terry's "Old Blue, the Flipping F2" restification thread.
« Reply #13 on: January 28, 2023, 04:13:48 PM »
Thanks guys. No I wasn't giving away my Martek coils David, they're going into my Kawasaki 1428 bike, if I don't install a new Dyna 2000. Rob found a pair of NGK coils with the correct spec and I installed them and made up new copper cored spark plug wires as I needed longer than the original ones to suit the new mounting location, as the NGK coils are physically larger than the old Italian ones.

Yesterday was a stinker, 35 deg C (95 deg F) so no bike rides, instead I did some more work on the F2. I found some ancient brazing rods in my garage and brazed up a hole in the OEM headers using my special oxy/acetylene "Henrob" torch. Fantastic tool, called "The poor man's TIG", if you're a good welder (which I'm not) you can weld anything with the minimum of warpage, or blowing holes in thin metal like the rusty old header. Not pretty, but it did the job.

F2 Saturday 28 Jan 2023 3 by Terry Prendergast, on Flickr

I decided to try to scrub as much of the rust and road grime off the headers before I reinstalled the exhaust, so I got a bucket of soapy water and a nylon scouring pad and was happy that they looked quite presentable. I scrubbed the muffler as well, and was happy to discover that it's a genuine Dunstall muffler, not one of the cheap chinese ripoffs that are around everywhere now.

F2 Saturday 28 Jan 2023 5 by Terry Prendergast, on Flickr

I fitted the exhaust and fired it up, and it sounded great. The oil light went off as soon as the engine started this time, so I'm not sure why it stayed on the last time, but it ran sweetly, and the only thing that was coming out of the muffler was a shower of rusty particles. The engine actually sounded quite sweet.

F2 Saturday 28 Jan 2023 4 by Terry Prendergast, on Flickr

With the shiny exhaust, the rest of the bike looked disgusting, so I fired it up again, snicked it into gear (no stuck clutch either, another plus) and rode it up the driveway to give it a scrub. I'd gone to a bike show in 2018 and had bought a couple of small bottles of stuff for cleaning wheels and forgotten about it until I realised that I was out of degreaser yesterday, so used both bottles to clean the wheels, particularly the back wheel which was caked in petrified chain grease. It was one of those "spray on, hose off" deals, so while the front wheel was easy to clean, the back one needed a good scrub, so once again I got the abrasive pad out again and scraped/scrubbed the muck off it. I gave the rest of the bike a good wash too, and it looked much better.

F2 Saturday 28 Jan 2023 6 by Terry Prendergast, on Flickr

F2 Saturday 28 Jan 2023 7 by Terry Prendergast, on Flickr

F2 Saturday 28 Jan 2023 9 by Terry Prendergast, on Flickr

I need to sand the corrosion off the top of the alternator cover and spray some satin black over it, and touch up the paint in a few other places too, and then try to clean up the top of the tank where the clearcoat is peeling, and spray it with some rattle can clear lacquer. It won't look perfect, but it'll be shiny, so that's good enough, I'd rather save the original paint than repaint it, the paint's only original once.

Today I'm going for a ride and don't know if I'll do any more work on it, although I do want to go thru the brakes at both ends. The front brake doesn't work at all, and the rear brake isn't much better. More soon. ;D

 
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline RAFster122s

  • I feel like a really really
  • Really Old Timer ...
  • *******
  • Posts: 12,365
  • SOHC4 member # 2605
Re: Terry's "Old Blue, the Flipping F2" restification thread.
« Reply #14 on: January 28, 2023, 05:08:01 PM »
Looking good Terry, amazing what a decent cleaning can do for an old dirty neglected bike. Glad the exhaust can is a true Install and it is coming together nicely. Hope you get a nice ride in...
David- back in the desert SW!

Offline BenelliSEI

  • Really Old Timer ...
  • *******
  • Posts: 9,913
  • 1969 cb750
Re: Terry's "Old Blue, the Flipping F2" restification thread.
« Reply #15 on: January 28, 2023, 05:57:35 PM »
Terry..... amazing progress. Surely someone needs that speedo?

Offline bear

  • Vale Bill McIntosh ......"illegitimi non carborundum"
  • Old Timer
  • ******
  • Posts: 2,575
  • Leeton in Australia
Re: Terry's "Old Blue, the Flipping F2" restification thread.
« Reply #16 on: January 28, 2023, 11:22:44 PM »
Terry..... as usual, 1 “Terry Day” equals 1 week for the rest of us!

Or in my case 1 "Brian Month". ;D
The older I get the faster I was.

Offline PeWe

  • Really Old Timer ...
  • *******
  • Posts: 15,569
  • Bike almost back to the 70's 2015
Re: Terry's "Old Blue, the Flipping F2" restification thread.
« Reply #17 on: January 29, 2023, 12:54:00 AM »
Terry is a good inspiration to fix things ;)

It must be warm to work outside when 35C.
My garage can be 27-28C summertime. Real pain. Those days I open port 5:30 am to cool it down so I can work a few hours if needed.

I thought that bike will look much better after a good clean as it does. Engine paint will improve it further.
CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline Terry in Australia

  • Really Old Timer ...
  • *******
  • Posts: 33,317
  • So, what do ya wanna talk about today?
Re: Terry's "Old Blue, the Flipping F2" restification thread.
« Reply #18 on: January 29, 2023, 11:52:17 AM »
Thanks Per, I looked at the thermometer in my garage at one stage and it was 43 deg C, or 109 deg F, so I spent as little time as possible inside. Yesterday was much cooler, around 25 deg C, so I went for a “23 rides” ride on Rob’s Royal Enfield 350, which I thought would be horrible, but actually enjoyed, and as I have it on long term loan, will do a few mods to make more enjoyable, and aesthetically pleasing, at the moment it looks like it was dragged out of a drain.

Tonight after work I’ll get the F2’s brakes sorted, and start thinking about selling it. ;D
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline Terry in Australia

  • Really Old Timer ...
  • *******
  • Posts: 33,317
  • So, what do ya wanna talk about today?
Re: Terry's "Old Blue, the Flipping F2" restification thread.
« Reply #19 on: January 30, 2023, 01:34:06 AM »
Well the long weekend has come and gone, but after work tonight I decided to start work on the F2's brakes. The front MC works fine but the lines are plugged, giving the impression that I have a nice hard lever, but of course, just like the surgeon confided in me after my prostate surgery in 2018, I can tug on that thing as much as I like, and nothing's gonna happen. I decided to fix the rear brakes first, because they're the easiest, only being one caliper and one line.

The first shock was when I opened the cap. The expanding "bellows" style MC seal that is common to every motorcycle ever made, had actually dissolved. While it held the shape of the seal as it had sucked itself inside out, it had turned to soft black treacle that stuck to my fingers. I tried cleaning it out with scott towel and turpentine, but that didn't work, so I used acetone and that shifted it, just. I tried attaching the caliper suction device to the bleeder, but nothing came out, even though the pedal was rock hard. Bugger. I removed the hose from the MC to the caliper, and confirmed that it was plugged. I then had a series of wonderful ideas. I made sure both banjo bolts were clear of rusty mud, then reinserted them in their banjo's, and using 10 x 1.25 mm metric fine nuts to tighten the crush washers against the banjo's and then screwed a tight fitting piece of rubber fuel line over the threads of each banjo bolt and used my air blaster gun to blow the crud out of the brake line, from either end, until it finally expelled the little bits of crud, woohoo!

I reinstalled the brake line at the MC, and pumped the fresh brake fluid thru the line, holding my forefinger and thumb against the open banjo at the loose (caliper) end of the hose to create suction whenever I raised the brake pedal, after depressing it each time, to pump the fluid through quickly. I then reconnected the brake line to the caliper, and pumped the pedal again, this time pressing my forefinger against the open bleeder screw hole, to create vacuum again, which made it super easy to pump out the old crap, and I kept doing this and refilling the MC's reservoir until only clean brake fluid poured out.

It made a mess, so I re-installed the bleeder after I cleaned it up on my wire wheel, did the final bleeding (which wasn't required after all that fingering, there were no air bubbles left) tightened the bleed screw, tipped water over the caliper, swingarm and the Dunstall muffler to wash away the old brake fluid that had dribbled everywhere, and called it a night. The brakes work well, although the wheel is a little reticent to turn, so tomorrow I might disassemble the caliper and give the piston and cylinder a clean, along with the ancient pads.

I decided that it was time to run it for a little while, and see if any smoke came out. So far, so good....... ;D


     
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline grcamna2

  • Not a
  • Really Old Timer ...
  • *******
  • Posts: 15,139
  • I love to restore & travel. Keep'em Going Strong !
Re: Terry's "Old Blue, the Flipping F2" restification thread.
« Reply #20 on: January 30, 2023, 02:50:44 PM »
Terry,I asked you this earlier but you had not told me:what year of manufacture is your F bike ?
The engine seems to be burning clean.
75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Offline Terry in Australia

  • Really Old Timer ...
  • *******
  • Posts: 33,317
  • So, what do ya wanna talk about today?
Re: Terry's "Old Blue, the Flipping F2" restification thread.
« Reply #21 on: January 30, 2023, 03:08:51 PM »
Terry,I asked you this earlier but you had not told me:what year of manufacture is your F bike ?
The engine seems to be burning clean.

It's a 7/77 build Bill. Yep, no smoke, my suspicion is that Peter was running it with dirty old oil and that's why he noticed some smoke. I won't get too excited until I've ridden a few miles, but at this stage, for an F2 with 50,000 miles, it appears to be in good order. ;D
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline grcamna2

  • Not a
  • Really Old Timer ...
  • *******
  • Posts: 15,139
  • I love to restore & travel. Keep'em Going Strong !
Re: Terry's "Old Blue, the Flipping F2" restification thread.
« Reply #22 on: January 30, 2023, 03:12:26 PM »
Terry,I asked you this earlier but you had not told me:what year of manufacture is your F bike ?
The engine seems to be burning clean.

It's a 7/77 build Bill. Yep, no smoke, my suspicion is that Peter was running it with dirty old oil and that's why he noticed some smoke. I won't get too excited until I've ridden a few miles, but at this stage, for an F2 with 50,000 miles, it appears to be in good order. ;D

The PO Peter looked to have been a responsible owner to that F bike;if I lived in that area I would have certainly enjoyed purchasing that nice,blue 750 from him.  8)  ;)
« Last Edit: January 30, 2023, 07:26:32 PM by grcamna2 »
75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Offline Terry in Australia

  • Really Old Timer ...
  • *******
  • Posts: 33,317
  • So, what do ya wanna talk about today?
Re: Terry's "Old Blue, the Flipping F2" restification thread.
« Reply #23 on: January 30, 2023, 05:22:09 PM »
I was lucky that I got in first Bill, by the time I arrived at Peter’s place he had a couple of phone numbers for guys who also wanted it if I didn’t take it, both had offered more than the asking price. When it’s ready to ride it’ll be worth at least twice what I paid for it. ;D
I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline spotty

  • Master
  • *****
  • Posts: 1,932
  • cb750....for when a Vmax is just too much bike
    • spottys world of vmaxes and great danes
Re: Terry's "Old Blue, the Flipping F2" restification thread.
« Reply #24 on: January 30, 2023, 08:32:36 PM »
nice
i blame Terry