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Author Topic: Maduncle has FINALLY got himself a CB750K  (Read 34614 times)

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Offline maduncle

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #50 on: October 26, 2015, 04:08:24 AM »
Todays assembly progress.

The bronze swing arm bushes arrived today so I wasted no time.



I also fitted the rear shocks (new top nuts on their way), and fitted the battery tray, tool tray, electrics holder, new wiring harness, starter solenoid, oil tank and inner guard.
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Offline Terry in Australia

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #51 on: October 26, 2015, 11:42:20 PM »
Looking good Cliff, don't forget to test the fuel tank for leaks before you paint it. Cheers, Terry. ;D
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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 maduncle

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #52 on: October 27, 2015, 02:47:21 AM »
Quote from: Terry in Australia on October 26, 2015, 11:42:20 PM
Looking good Cliff, don't forget to test the fuel tank for leaks before you paint it. Cheers, Terry. ;D

Good point - better get onto that this weekend.
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Offline maduncle

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #53 on: October 28, 2015, 03:42:34 AM »

My box of new parts arrived from 4 into 1 today, quick postage but lousy packaging. The box was torn open down one side but lucky for me it was all still there.

So now I have new head stem bearings, new front and rear wheel bearings, new wheel bearing retainers, new front and rear sprockets and chain, new side cover grommets, and a few other new bits (I can't remember).

So this means I can get the bearings in the wheels this week and the wheels off for new tyres next week.
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Offline Terry in Australia

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #54 on: October 28, 2015, 04:11:58 AM »
I think I've got a near new rear Bridgestone BT45 if you want it Cliff? 120/90 - 18, from memory? Freebie. Cheers, Terry. ;D
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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 maduncle

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #55 on: October 29, 2015, 04:15:54 AM »
Quote from: Terry in Australia on October 28, 2015, 04:11:58 AM
I think I've got a near new rear Bridgestone BT45 if you want it Cliff? 120/90 - 18, from memory? Freebie. Cheers, Terry. ;D

Hey that sounds pretty good and I should take you up on that generous offer, although I am looking at a more classic tyre though - I like the Dunlop TT100's.

I got the wheels mostly back together this evening, all the bearings are in and the front is fully assembled.

I just need to get that new bearing retainer to thread into the hub, might need to call by and see Jeff and his magic pin wrench.
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Offline Terry in Australia

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #56 on: October 29, 2015, 01:06:45 PM »
Ha ha, enjoy those TT100's mate, especially in the rain! Dunlop used to call them K81's, I figured that was how many riders were killed per month on average while using them, then after an IOM win they renamed them TT100's. Still one of the worst tyres in motorcycle history, but they do have that "period" look........ Blerk........ ;D
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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 scunny

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #57 on: October 29, 2015, 01:32:46 PM »
+1 on the TT100's, tried them, ditched them. running the BT39 front and BT45 rear now. a great tyre IMHO
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Offline Terry in Australia

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #58 on: October 29, 2015, 01:57:23 PM »
Yep, I ran BT45's on just about every bike over the last 20 years and they're brilliant, but I've recently fallen in love again with Pirelli tyres Scunny, I've got Sport Demons on my BMW K100RS and Yamaha FJ1200, and Scorpions on my Honda XR500R, and they've just changed the way those bikes handle. TT100's are only good for "necklacing" public servants........ ;D
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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 maduncle

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #59 on: October 30, 2015, 03:01:47 AM »
Okay then - looks like I am running BT's.

Thanks for the good advice folks.

(And I was a public servant once ...)
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Offline Terry in Australia

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #60 on: October 30, 2015, 06:02:04 PM »
No worries Cliff, and my sympathies for your previous life, but it does explain a lot............. ;D
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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 maduncle

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #61 on: November 02, 2015, 10:37:48 PM »
Thanks Terry - you are too kind (or too honest)...

Meanwhile the blacking out continues (not me - the bike).

I cleaned the old rear guard, tapped a few of the smaller dents out, filled the dents, trimmed it back to remove the old tail light holder mount and painted it - you guessed it - matt black.

I also have these very neat little bullet indicators with LED's in them, so I fitted the rear two on where the rear guard bolts up in the frame ends, the indicators are the same size as the flat tab in the frame rear - perfect fit.



Next step - get some rubber on the newly rebuilt and painted wheels and then I have a rolling frame.
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Offline 754

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #62 on: November 03, 2015, 10:13:46 AM »
Terry, did you find TT100 not working well in the dry ?
Most guys here did very well with them...
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Offline Terry in Australia

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #63 on: November 06, 2015, 01:16:35 AM »
Quote from: 754 on November 03, 2015, 10:13:46 AM
Terry, did you find TT100 not working well in the dry ?
Most guys here did very well with them...

G'Day Frank, I never used TT100's, only their predecessors, Dunlop's horrible K81's. To be fair, the OEM Bridgestone's on my shiny new CB750F were absolute rubbish, so I fitted new K81's, which were just as bad in the wet, offering no grip whatsoever.

I replaced them when they were only a month or two old with Continentals, and boy, what a difference! All of a sudden, I could go around corners on a wet day without using my alternator cover as a training wheel.......

For all I know the TT100's might be better, (the rubber compound could be a little bit softer, perhaps) but I've never felt the urge to reacqaint myself with that particular style of tyre, but from Scunny's comments, it doesn't appear that much has changed. ;D 
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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 maduncle

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #64 on: November 10, 2015, 01:47:00 AM »
Getting a few things done.

I now have tyres on my black wheels and the rear mounted up with the Tarrozi rear sets connected.

Working on the front end at the moment, installing the 'temporary' stock forks whilst I get the triples for the monster front end fabricated.

And a good friend has painted my tank for me, gloss gunmetal silver with a matt stripe down the centre. I am very happy with the way it came out.



Just waiting on a parts order from 4into1 to arrive and then I can finish off the front end with fresh gators and brake pads.
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Offline Stev-o

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #65 on: November 10, 2015, 05:06:04 PM »
Tank looks great, nothin like fresh paint
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Offline maduncle

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #66 on: November 11, 2015, 02:29:27 AM »
My second 4into1 order arrived today, they are quite fast with their international shipping.

So I got my fork gators, meaning I could put the front wheel on.



Yes I ended up going with TT100's, what I originally wanted for this bike.

I also got new brake lines made locally, including a shortie for the clip on's.


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Offline maduncle

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #67 on: November 16, 2015, 02:28:06 AM »
Quote from: calj737 on November 11, 2015, 03:58:34 AM
Do those gators have the weep holes in them? I bought some from DCC that did not is why I ask.

Weep holes? Ah - no.

Should they?
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Offline maduncle

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #68 on: November 16, 2015, 02:29:47 AM »
Some progress.

I was offered a Dime City Cycle billet top triple for a few bucks. Mate of mine bought it for his CB450 and I knew it was the same unit they sell for the CB750 so I snapped it up.



Fitted the tiny gauges to it and used spacers to drop them down a bit.
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Offline SOHC4 Cafe Racer Fan

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #69 on: November 16, 2015, 07:45:33 AM »
I had a pair on my 750. I kept them cleaned and conditioned but they still cracked on the seams after 2 years.
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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 maduncle

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #70 on: November 16, 2015, 12:18:54 PM »
Quote from: calj737 on November 16, 2015, 03:32:03 AM
Yes, they should have weep holes to allow any moisture out. Else, your beautiful chrome fork tubes will rust up quickly. They should be oriented to the rear, and on the "lower" lip of the accordion flap. You can heat up a drill bit and make your own by plunging into the boot if you want to have them.

Others have found those DCC boots to be very cheap and tear up pretty quickly.

Thanks for the hot tip (hahaha).

Mine are from 4into1, so who knows how long they will last.
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CB750K2 (only slightly modified)

Offline maduncle

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #71 on: November 20, 2015, 02:29:48 AM »
More progress.

Upgraded the front brake master cylinder and lever to a more modern unit (off a ZX14). Also got a single braided brake line to run from master cylinder to caliper as the new brake lever perch has the brake light with in it - no more huge ugly front brake signal unit.

Got the right sized headlamp and fitted the bowl (plenty of room to store all that wiring loom).

And put the tank on to see how it looks.




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Offline SOHC4 Cafe Racer Fan

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #72 on: November 20, 2015, 09:43:40 AM »
Understated and tidy. Looking good.
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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 maduncle

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #73 on: November 25, 2015, 03:17:19 AM »
What a big week.

All my parts have arrived this week so I have now done everything I can to the bike whilst waiting for barrels to be hogged out so I can build the engine.

New switch blocks are on, new front brakes are in, custom short front fender is on, grips are on, all wiring is tucked into the headlamp, a new threaded swing arm grease nipple/zort is fitted, and the rolling bike is off the build stand and parked ready for the engine.

I noticed how much of a lean it has on the side stand, so I just picked up a 1982 CB900 side stand to fit to the bike.

Photos of the finished roller soon - and then it is time to move to "stage two" and design the top and bottom triples for the Ducati USD front forks conversion. I was lucky to get ten minutes of Rex's (of T-Rex racing developments) time this week and he explained how to come up with the right formula for triples that will improve the handling on a CB750. Well worth calling in to see him.
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Offline maduncle

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Re: Maduncle has FINALLY got himself a CB750K
« Reply #74 on: December 01, 2015, 03:36:02 AM »
Got the CB900F side stand yesterday and fitted it today - big difference.





I finished all of the engine painting today too, everything is blacked out and ready for assembly as soon as I get my barrels back from being re-sleeved.

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CB750K2 (only slightly modified)
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