Topic: Dry clutch on CB750

[voxonda]

Easy to be on center..
Slip on a barrel and clock in the hole, then remove barrel and drill!.. or clock off the base of the stud..

 Very Cool looking clutch, nicely made..

Done it by eye, which is a great achievement with my eyesight

[wannabridin]

i'm getting more and more excited rob!!!  can't wait for more updates!

[wannabridin]

hey rob!!  hows the weekend going??

[voxonda]

hey rob!!  hows the weekend going??

Hey G, you are excited!!!

Besides the weather it is well. Cases are cleaned and painted and waiting to be assembled. Tuesday the new primary tensioner will be here sothen I can close the cases. My friend has a set of 4th over pistons and rings that will go into the engine, so we'll bore the block and have it honed. So all new tensioner and chains, new shell's, so it will be good for a few miles.

rob

[voxonda]

At last, the new tensioner is here, so can close the bottom part. Waiting for parts is the most frustrating part of engine/bike building

[Retro Rocket]

At last, the new tensioner is here, so can close the bottom part. Waiting for parts is the most frustrating part of engine/bike building

Yep,i hate waiting as well, 2 years and i still don't have everything.....

Mick

[wannabridin]

well at least you can button everything up!!!  is the tensioner all you had left to put the motor back together?

[voxonda]

Hey G,

To close the casings, yes, just wanted to use a new tensioner with the new chains. Next is to bore/hone the block to 4th over pistons. The rest is ready and waiting to be assembled. New chains and tensioners allround, new shells, new pistons etc.
If only I had nothing else to do , No it is slowly progressing but it will not be long now before it will come alive! But want the engine to look clean.

Rob

[wannabridin]

UNACCEPTABLE ROB!!!  take vacation days so you can finish my dry clutch!!!

i'm just playing!  i totally understand...  i KEEP having crap come up that delays my build, i should of listened to everyone on here when they told me it takes a LOT longer than you think it will, regardless of your financial situation... 

man i hope this thing makes an absolute RACKET, just like the Duc clutches!!      thanks for the updates Rob, i hope you have a LOT of freetime soon!!!

[voxonda]

Well unpacked my new tensioner, but instantly saw that it sat lower than the used one. When I compared them, the new one has less tension then the used one. What shall I do? I do 'tune' the tensioners so they will follow the chain longer and better, but still.................
Does anyone know if there is a size for how 'high' the tensioner should sit?

Thanks, Rob

[HavocTurbo]

At last, the new tensioner is here, so can close the bottom part. Waiting for parts is the most frustrating part of engine/bike building

Yep,i hate waiting as well, 2 years and i still don't have everything.....

Mick

I'm pushing 12..... 

[voxonda]

Well, engine waiting patiently for it's parts, crankbearings and new pistonrings. Pic of a few days back, cases, cylinder and head are completely stripped and painted now. Both bores and piston are well within spec's! After 42k miles. Not bad.

Brakes from testbike are scrap, so had to find alternatives, found some good CB900FB brakes so they will do the stopping (hopefully).


With just little over 1.5 week to launch at Croix in Northern France, think I have to work my butt off to get her ready in time.
Have to mount new rubber and a 520 chain. Yes, it is a costly hobby. And still have to build a exhaust

Rob

[bwaller]

Sounds like you have work cut out for yourself Rob, good luck getting it all done.

We'll be watching! 

[wannabridin]

sweet!!!  it's coming together!!!  i can't wait to see everything back in the bike ready to go!!!  hurry up!!!      just messin, looking great rob, i'm doing my best to be patient!!!

[Howell]

Well, engine waiting patiently for it's parts, crankbearings and new pistonrings. Pic of a few days back, cases, cylinder and head are completely stripped and painted now. Both bores and piston are well within spec's! After 42k miles. Not bad.

Brakes from testbike are scrap, so had to find alternatives, found some good CB900FB brakes so they will do the stopping (hopefully).


With just little over 1.5 week to launch at Croix in Northern France, think I have to work my butt off to get her ready in time.
Have to mount new rubber and a 520 chain. Yes, it is a costly hobby. And still have to build a exhaust

Rob

Hey Rob,

These brakes looks familiar , you have to need them at Croix.
1.5 week is time enough to finish those 'little' things.

[wannabridin]

ya!!  building an exhaust is cake!!!   

[turboguzzi]

Hei rob,

the last few days when you have to make everything work are always hard, run cables, make small brackets, stupid things missing, run to the nearest hardware store 

havent seen even one racer project where the end before hitting the track was not pure madness.... so hold on tight!


Got the feeling that those 276mm discs are going to be on the small side for a big and not so light 750. I run 276's in my 145kg 500 and they dont have an easy time, not much of a heat sink in those thin discs.

+ Are you able to find any good racing pads for those calipers?

TG

[voxonda]

Hey TG,

Yeah it is pure madness, but I think we just want it to be!
The bike I'm building is meant to be a testjig for the clutch, it has to be driveable and no more for the time being. When the clutch holds out in this test, I will use this bike to put streetmiles on the clutch.
So I think the brakes will be sufficient. When all is well with the clutch, we'll put it in a (very) high output CR836 to see how it copes with that power and foremost the CR-gearbox.
Planning was to use Lockheed or Grimeca calipers with CP211 racing pads, but no time......................

Cheers, Rob

[kos]

Rob, yes to your going to true two piston calipers vs Hondas rather poor attempt at the look of 4 pistons calipers.  Gremica or the real Lockeeds with work much better and then you will have many pad choices.


KOS

[voxonda]

Mark, that will definitely be the next step!

rob

[wannabridin]

so rob, i noticed i have a dinged up clutch cover.  you know what would be a great way to fix these dings?  your dry clutch of course!!!   

how's it coming??

[voxonda]

Well had some small setbacks, nothing to do with the clutch, but with other parts of the bike. Hope to show(?) some pic's of the engine in frame by Friday. Afraid won't make it to Croix with the F2/dry clutch bike. time is running out and have to have a new front mounted on the replica and a 15 teeth front sprocket. Gearing has to be short on Croix.

Rob

[wannabridin]

hey rob!  just checking in.  i'm getting ancy and i've been saving up as much as i can think of!!  hows the progress going??

[HavocTurbo]

wanna-

I laugh everytime I read your constant pestering. You sir are hilarious in your pursuit for a dry clutch.


Vox-

I cannot seem to access your site. Maybe it's because I am at work, but just wanted to let you know.

I am probably going buy one of these from you as soon as I beg bellcow for his RC magneto drive. In all the confusion I forgot that he had one and offered to sell it to me.

Pics look awesome man. I cannot wait to hear a vid.

[wannabridin]

haha, i'm glad i can provide some entertainment for you HT!  i've just always loved the look and sound of a dry clutch on the duc's i used to work on, and i love the form follows function.  that's why i want a clear points and dyno cover!  i like to see things move and work, but hey, i'm bored down here in TX, so why not pester Rob!   

the site's working fine for me at work.