Topic: CB750 Fours using altered OEM frames

[kos]

Here is a photo of the Michael Hodgson's AHRMA legal Heavyweight Superbike CB750 based bike.

Note, added bracing at front down tubes and at rear where frame tubes run down to swingarm pivot. Plus... is was chromed.
Also, note dyno cover that we did here at M3 Racing HQ. Just cut out about 3" of width and tig welded a round plate to end.

Nice work... IMHO


KOS

[Howell]

Here is a photo of the Michael Hodgson's AHRMA legal Heavyweight Superbike CB750 based bike.

Note, added bracing at front down tubes and at rear where frame tubes run down to swingarm pivot. Plus... is was chromed.
Also, note dyno cover that we did here at M3 Racing HQ. Just cut out about 3" of width and tig welded a round plate to end.

Nice work... IMHO


KOS

That's not so special , I did the same with my CB750 racer already in the seventies.
I only have this picture of it , you can't see the braces on it unfortunately only the dyno cover

[voxonda]

Here's a better view:

[turboguzzi]

great shot howell, you look a bit younfer there..... and some funky tail too

Nice work Kos, these 500 engine covers are not bad either me thinks....

[Howell]

Here's a better view:

Oke, Rob,

Of course I have this picture also , but still you can't see the bracing.
I choose the other picture because you can see the dyno cover on it.
This is the bike in 1978 where I changed the position of the rearchocks in the way the Suzuki RG500 had.
Worked much better.
Also I made many reinforcements on the frame as you can see.
And I had another sponsor.

[Howell]

great shot howell, you look a bit younfer there..... and some funky tail too

Those where the days 

[kos]

great shot howell, you look a bit younfer there..... and some funky tail too

Nice work Kos, these 500 engine covers are not bad either me thinks....

Those covers make the ones I did up... look like junk! Nice work. Now make some for CB750. I just wanted to start a thread about 750 frames that are not special, but modified from stock...that is all I was trying to do. I hope to see more photos soon.


KOS

[kos]

Here is a photo of the Michael Hodgson's AHRMA legal Heavyweight Superbike CB750 based bike.

Note, added bracing at front down tubes and at rear where frame tubes run down to swingarm pivot. Plus... is was chromed.
Also, note dyno cover that we did here at M3 Racing HQ. Just cut out about 3" of width and tig welded a round plate to end.

Nice work... IMHO


KOS

"That's not so special"
(Quote)

I did not say it was special. I was and am trying to get members to send in photos of standard OEM Honda CB750 frames that have been changed vs completly new versions from specialists. Just a different thread.

Thanks for sending in your pics...very nice.

KOS

[MRieck]

I think many of us here that are over 50 have seen many, many variations of frames whether they be stock/modified or aftermarket. It is always cool to show nice stuff. I believe I've seen some full shots of that bike kos showed....it is a very clean early F.

[Bill/BentON Racing]

The bike looks and runs well and sounds awesome! Met Michael and his wife Sharon @ Road Atlanta today. My buddy Chris (Hippie) is builder/tuner now.Kos,that frame is beautiful.Got to talking and didn't shoot as many pics as I shoud've. But will try and post a few in a little while.They took off the Lesters and added later model wheels and f/end.Also Wiseco 836cc kit.Has Ohlins shocks now.Bill...I getting Michael to join forum.Got to e mail him now.

[Bill/BentON Racing]

Michael firing it up.what a great sound.

[bwaller]

Yes that's a very tidy looking race bike.

Wait...am I seeing double Bill?

[Bill/BentON Racing]

No,they took the parts off the one from Kos and started that one a week ago.Had to match paint schemes!Bill

[MRieck]

I like the paint and overall look...nice. I'd like to know what is inside it.

[MRieck]

 Are 32 TMR's allowed in that class? I'd like to port a head for that thing.

[turboguzzi]

great shot howell, you look a bit younfer there..... and some funky tail too

Nice work Kos, these 500 engine covers are not bad either me thinks....

Those covers make the ones I did up... look like junk! Nice work. Now make some for CB750. I just wanted to start a thread about 750 frames that are not special, but modified from stock...that is all I was trying to do. I hope to see more photos soon.


KOS

Not a bad idea Kos.... want your logo on them?

Do most people who race 750's chop the crank's stub or would it be better to make them deep enough for a stock crank end without alternator?

What's a bit surprising about that bike is the angle of the shocks! they look like they join the swingarm very far ahead of the axle. why?

Seen your post on 17" tires, got to say that the superbike class here in italy seems to work pretty well on 18's, but the prices of racing avons and dunlops certainly sucks

TG

[voxonda]

I make the ignitioncovers from billet, instead of casting, much stronger when sliding/crashing.

Rob

[Bill/BentON Racing]

great shot howell, you look a bit younfer there..... and some funky tail too

Nice work Kos, these 500 engine covers are not bad either me thinks....

Those covers make the ones I did up... look like junk! Nice work. Now make some for CB750. I just wanted to start a thread about 750 frames that are not special, but modified from stock...that is all I was trying to do. I hope to see more photos soon.


KOS

Not a bad idea Kos.... want your logo on them?

Do most people who race 750's chop the crank's stub or would it be better to make them deep enough for a stock crank end without alternator?

What's a bit surprising about that bike is the angle of the shocks! they look like they join the swingarm very far ahead of the axle. why?

Seen your post on 17" tires, got to say that the superbike class here in italy seems to work pretty well on 18's, but the prices of racing avons and dunlops certainly sucks

TG

TG,I also wondered about shock placement/angle but didn't ask or look closer.But I will,MR will try and post specs.Bill

[Bill/BentON Racing]

Are 32 TMR's allowed in that class? I'd like to port a head for that thing.

We'find out! ,Bill

[kos]

I like the paint and overall look...nice. I'd like to know what is inside it.

Parts and tuning inside are simple and straightforward, but since Michael paid for these services/parts, he is the one that can allow that information to be divulged. He has a guy named Chris Burkle, I believe doing the engine rebuilds.. now and Chris has purchased the parts he needed via my M3 Racing USA company. Originally, I built up the first engine that used a head that we did here at M3 for the Gary Nixon powered CR750 that Gary raced in early 2000's. Since he has two bikes now, it would be hard to tell what is inside, but since the plaque used at Road Atlanta say's, 836cc by Wiseco...they have changed the bore to work within AHRMA Vintage Superbike rules. When I did engine it was 62mm M3 pistons to meet F750 AHRMA rules. Camshaft in engine that I did, was M3 grind done at MegaCycle.

I do remember Mike being a big fan of close ratio gear boxes, but not sure, if that is in this engine.

Perhaps Micaheal will show up on this form. I hope so, he and his with Sharon and great people!

KOS
M3 Racing USA

[kos]

Are 32 TMR's allowed in that class? I'd like to port a head for that thing.

As per AHRMA VSB rules, any round slide, non pumper carb is allowed.  Not even restricted in carb throat size. And, 836 is not cc limit....you can go much bigger! Like 931cc.


KOS

[kos]

I make the ignitioncovers from billet, instead of casting, much stronger when sliding/crashing.

Rob

I love billet, we made our covers from OEM casting, then added alloy plate, because we were in a hurry! You know, "racing to the race" stuff that happens, it seems all the time, even when you start way early on a project.

KOS

[Magpie]

Seen in a parking lot this weekend.

[kos]

Not a bad idea Kos.... want your logo on them?

Do most people who race 750's chop the crank's stub or would it be better to make them deep enough for a stock crank end without alternator?

Yes, I agree the best is to cut off crank, but most customers I deal with do not want to do that. A nice billet or even cast cover to just clear the crank end would be best along with a thick, point side ignition cover with M3 Racing on it...would be great. I should be in the business of making these along with other billet parts very soon. My son who is just done with Machinists school in 2011 are planning on purchasing 3-5 axis milling and lathe centers.

Can you get something going right away?

We might even do plastic... as that is what all the Sportbike suppliers and racers are using. Trouble is, moulding machines are very expensive!

KOS







[/quote]

[Bill/BentON Racing]

Kos,it's the dies that are EXPENSIVE,I have access to machines.Bill PM if you so desire.