Author Topic: Terry's NEW Redneck CB750 rebuild. The "Swamp Rat". Too soon? Nah..........  (Read 48877 times)

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Offline PeWe

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Congrat Terry! It idled nice and even... you run it on points, right? ;)

Leo, the sofa rat seems to enjoy life with you... or on you... :)

You'll find a better pan for the final assembly?
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 754

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You need an extra Webco valve cap looks like  2 types some have a knurl.
 They look a fukovalot better thanbthem HenriAbe, and other offshore types. 
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It's All part of the ADVENTURE...

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Lost quite a few CB 750's along the way

Offline strynboen

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    • http://forums.sohc4.net/index.php?PHPSESSID=uhi9kme21nvuhfbvn63stcdbj2&/topic,60973.0.html
thek the gears..before split it in parts for paint...a broken gear..and a engine bottom split..can be done easy vhen the parts dry and hardent up...
i kan not speak english/but trying!!
http://forums.sohc4.net/index.php?topic=60973.0
http://forums.sohc4.net/index.php?topic=144758.0
i hate all this v-w.... vords

Offline BPellerine

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great job terry,been watching this one,just goes to show you dont need a ton of nos parts to get a running bike,tough engines!hope your luck holds out!bill
1978 CB 750K ard and webers
another anfob

Offline spotty

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  • cb750....for when a Vmax is just too much bike
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well done

vittles is redneck for victuals which is ' food or provisions '
i blame Terry

Offline Terry in Australia

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Thanks guys, I'm still basking in the glow of my own success, as you'd expect. I really am happy that I could save the engine, I did wonder when I first brought it home whether I'd be able to use the engine for anything more than parts, so I'm very happy that, like Bill says, it's a tough old engine.

Coincidentally Larry, I had my 9 month consultation with the Bariatric Surgeon tonight, and she's happy that I've lost 120 pounds, I do still struggle a bit with getting some foods down, but all in all, I'm doing ok. I don't know what it is about medical folks though, I had a blood test last week for my GP, so I gave the results to Salena (the bariatric surgeon) tonight, but she needed other tests done, so I'm having another blood test on Friday, then yet another blood test in a couple of weeks as part of my 5 year Army medical, fcuk, my arms look like a heroin addicts!

Per, yep, I spent a little time cleaning the sh1t off those points, they were burned and ugly, and the spark was so weak compared to the nice fat blue flash I'm used to from an electronic ignition, so I'll throw that ignition away and install one of my ancient Martek ignitions with some Martek coils, I had a Suzuki GS750 happily idling at 250 RPM with one of them (GS750/1000 ignitions will work in a CB750, and vice versa) a few years back, just for fun I'm interested in seeing how low I can get a CB750 to idle with one installed.

Frank, I took that cam cover with those Webco valve caps off the US import engine I bought for my "Bitsa" build, but I've also got a complete new set of 8 that Ron (MC Rider) sold me a few years ago, I know they were all the rage back in the day, but I can't really see any practical purpose for them? Back when I was making and selling oil cooler kits for CB750's I made up a special adapter to pump oil directly up into the cam cover via the exhaust side valve caps, but I can't remember why? I've still got it in a box somewhere. I've got a set of new Honda cam caps that I bought some time ago, I might install them eventually.

Lars, yeah mate, I will check the gears next time I fire it up, I'll work the clutch and run it through the gears, I'm not expecting any problems though, there was no metal in the sump pan, and even the primary chains didn't appear to have any slop in them from the check I did with the oil pump removed. I did think about throwing a chain on it and running it around my street before I pull the engine, but I can't be bothered, as I'd have to put my other wheels on it, a clutch lever, throttle etc etc, and it's all gotta come off again when I pull the engine. If I can run it thru all the gears with the engine running, I'll call it "good enough".

I think the fact that four litres of oil had drained into the engine probably saved the internals, as everything I looked at was coated in a black sloppy goo. I'll hook up an oil pressure gauge before I run it again just to make sure oil is circulating properly, then I'll dump the oil and new filter before I take it out on the road with new oil and another new filter. Hmmnn, I better order some new filters, the bitsa could probably do with an oil change too.

Okay, as I said I was at my surgeons tonight, so got nothing more done, but tomorrow, (weather permitting) I'll get some more done, and post some pics. Thanks again everyone, I'm really enjoying this project! ;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

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Low idle and too low oil pressure might happen, especially when oil is really warm... Too low pressure, not good.
Terry, you might have a pressure gauge somewhere...
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

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Low idle and too low oil pressure might happen, especially when oil is really warm... Too low pressure, not good.
Terry, you might have a pressure gauge somewhere...

Yeah mate, I'm only gonna do it as an experiment, just I was surprised how low I could get that Suzy to idle with the Martek, so I'll see if a CB750 can do it too, but I'll wind it up to 1K RPM after that. ;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 70CB750

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Coming along, good job, Terry.  ;D
Prokop
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I love it when parts come together.

Dorothy - my CB750
CB750K3F - The Red
Sidecar


CB900C

2006 KLR650

Offline Terry in Australia

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Coming along, good job, Terry.  ;D

Thanks mate! ;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

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Glad you were able to inexpensively get her running Terry. How much do you guess you have in her beyond the purchase price of $500.
Even though you might not have shelled out money in recent purchases your dives into your parts stash has a cost/value.

Congrats on the loss of 120 pounds! You are looking very good. Do you intend to drop any more weight ,or are you satisfied with the amount you have lost? 120 is a very respectable amount of weight loss after bariatric surgery. Please do not misunderstand my question as a comment of you needing to lose any more weight as you are looking trim and looking good. Didn't know if your goal was higher for your weight loss.

David
David- back in the desert SW!

Offline Terry in Australia

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Thanks David, no offence taken mate, you and I have been chatting about this over the last few months and I'm happy to talk about it. I weighed 153 Kilograms (336 pounds) when I had the surgery on August 31 last year, I'm now 97, (213) and would like to eventually get down to 89 Kg. (195 pounds)

Over here, a good running complete rideable CB750 is worth $5K all day, especially if it has the original pipes. I've got a guy looking for a good faded but original paint tank and side covers, so that's where this one is headed, another "patina bike". What's my time worth? Well, I have done work for customers before, but usually I just give them a price and stick to it, I don't bother working out how many hours etc, and of course when I'm doing it for myself, I just do it because  I love playing with bikes. What are my old used parts worth?

Well at the moment, not having to constantly buy in parts, just being able to pull them off the shelves, or out of tubs,  is priceless. I know I've probably bought them all over the last 30 years or so, and I have inherited parts from previous builds etc, but I guess it all adds up. So far, so good. ;D
« Last Edit: May 16, 2019, 01:51:44 AM by Terry in Australia »
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 BPellerine

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hey terry thought I saw a tall skinny guy on your harley!haha bill
1978 CB 750K ard and webers
another anfob

Offline seanbarney41

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Terry always has the funnest threads on this site!  This stuff is the thrill of old bikes for me...nothing better than the excitement of when that lump of corroded aluminum suddenly starts making all the right sounds.


Such a shame to see so many others here spend years and thousands only for it to reluctantly knock on 2 out 4 cylinders...but none of that unhappiness here!
If it works good, it looks good...

Offline Terry in Australia

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Thanks Bill, it is weird seeing that skinny guy looking back at me in the bathroom mirror, and buying a whole new wardrobe has been pretty expensive, but now I can eat again (albeit much smaller portions) is fantastic, and I've definitely got my mojo back! Here's a pic of me and my little sister taken at Easter, its hard to believe that 2 years ago our combined weight was well over 600 pounds! ;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 Pezz

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G'day Terry
Enjoying your work here. . . .
Long time since we last chatted
Pezz :)

Offline MoMo

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Thanks Bill, it is weird seeing that skinny guy looking back at me in the bathroom mirror, and buying a whole new wardrobe has been pretty expensive, but now I can eat again (albeit much smaller portions) is fantastic, and I've definitely got my mojo back! Here's a pic of me and my little sister taken at Easter, its hard to believe that 2 years ago our combined weight was well over 600 pounds! ;D



The slim, trim and fit family.   Good work.   I know quite a few people that had your surgery done, took at least 6  months with all for their system to settle in...Larry

Offline PeWe

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You look good Terry! You can wear a jacket/blazer with good look now, right? That kind of clothing sit not that nice with a huge stomach making it to hang like a tent with missing poles. That's my goal, also shrinking the pregnant look, almost there.

The woman on the photo look like a very good build!  ;)
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

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Thanks guys, I really am enjoying life at the moment, my health is better than it's been this century, and while I'm still having back, shoulder, hip and knee issues, I'm happy, and happy is better than anything. I tell anyone who hangs around me long enough that the only real measure of your success is whether you're happy. If you're not happy, then nothing else matters.

Anyway, enough of my half-arsed philosophy. Today was a nice sunny day, not hot, or even really warm, but not cold either. I came home with a bit of time left to play with my toys. First good news was the wheel that Mark Harrison sent me arrived. Looks great, was half the price of that Z1 wheel that I sent back (and received the refund for today, which was good) and so I now have two good wheels to fit those new "Stinko" tyres along with new rim bands and tubes. Not close to perfect, but quite acceptable for a 47 year old wheel. Thanks Mark!

Swamp rat Thursday tinkering 16 May 2019 1 by Terry Prendergast, on Flickr

I thought I'd better take the sprocket cover off so I could see if I could select some gears while the bike (with no chain attached) was sitting there. I'm lucky that I have a good used chain and sprockets, as much as I like to "recycle" good used parts, I feat that this sprocket might be just a little beyond serviceable.........

Swamp rat Thursday tinkering 16 May 2019 by Terry Prendergast, on Flickr

Okay, so next thing I needed to know was, "does the clutch work? Of course there was no clutch lever and only the rusted remains of the last 6 inches of rusted, rotten cable, so I went hunting throough my tubs of parts, and quickly found what I needed.

Swamp rat Thursday tinkering 16 May 2019 2 by Terry Prendergast, on Flickr

I hooked it all up, found a shiny new adjuster screw assembly, adjusted the clutch at both ends and gave it a squeeze. Success!

Swamp rat Thursday tinkering 16 May 2019 3 by Terry Prendergast, on Flickr

I found my one and only shift lever, bolted it up, fueled the little temporary tank and hooked up a battery, and it started on the first kick! Wow! This thing is super reliable. I let it warm up a little, then pulled the clutch in, surprisingly, this engine is very quiet mechanically and I didn't notice any decrease in engine noise with the clutch pulled in. I've made a couple of short video's but I don't know how to upload them to youtube, I might have to wait until my oldest son comes back down to Melbourne next week, he's the video guru in our family.

Anyway, I was just packing up when I remembered to go look for an oil pressure gauge. I took this one off last year because I think it's an air pressure gauge, it works fine, but has a slightly smaller thread than the 1/4" NPT or maybe BSPT thread, so when I made the adapter it leaked a bit when I had it on the other bike. I pulled the oil plug above the ignition but forgot that standing upright, oil would piss out, so I quickly did it back up again, I'll attach it tomorrow, after I jack up my trailer to get it leaning over a bit. Have a good one men, if ever any of my builds felt like it wanted to me to put it back on the road, I think this bike is the one. More tomorrow. ;D

Swamprat oil pressure gauge by Terry Prendergast, on Flickr
« Last Edit: May 16, 2019, 03:36:09 AM by Terry in Australia »
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 Don R

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 You have to love tubs of parts. A neighbor used to laugh at my box of car wiring until one day he needed to look through the box of wire!   
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Offline SOHC4 Cafe Racer Fan

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Looking good, Terry!
1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline PeWe

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You are in a good flow Terry. Everything just going right without any big hassle.

This will be the best working bike for lowest cost, right?
That is also a good thing.

Building a good looking bike for plenty of money is not difficult! ;)
« Last Edit: May 16, 2019, 11:46:33 AM by PeWe »
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

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Thanks Guys, I got home from work and almost immediately fell asleep in my chair. (I get up at 5am to start work at 6am, and I'm old, OK?) Anyhoo, I made a couple more short vids if anyone's interested? ;D



My #1 son has created a Youtube Channel (Terry's Bikes) for me, so I'll keep posting short vids as I go with this, and my other builds, bike rides, etc, looking at pics is great, but I do like watching engines running. Feel free to like and subscribe! (Don't leave any vulgar comments, I want to keep my channel kid friendly) ;D

 
« Last Edit: May 17, 2019, 02:12:04 AM by Terry in Australia »
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

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Clutch is working all the way? No stucked discs that must be released. Often by gear in clutch lever and rock bike forward- backward. I have seen 2 posts recently where this did not work, disassemble the clutch needed.

You can not write anything you want on Youtube, it might be deleted if it is not accepted by the gods ruling the world today.
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

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Clutch is working all the way? No stucked discs that must be released. Often by gear in clutch lever and rock bike forward- backward. I have seen 2 posts recently where this did not work, disassemble the clutch needed.

You can not write anything you want on Youtube, it might be deleted if it is not accepted by the gods ruling the world today.

Thanks Per, it seems to work fine, there was no chain on the Swamp Rat, so (with the engine off) I put it in gear, pulled the clutch in and turned the remains of the front sprocket by hand, and while there was some drag obviously, it did release. Once it's painted and back in the frame I'll install a good chain and sprockets, and if it does drag, I also have the largest selection of used CB750 clutch plates in the southern hemisphere.......... ;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)