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Author Topic: Comstars + gsx-r front end  (Read 12388 times)

Offline rs_ss350

  • Posts: 88
Comstars + gsx-r front end
« on: Apr 22, 2017, 20:10:27 »
I'm one of the rare few who actually like the look or comstars for my project, but wondered if there's a way to use them with the gsx-r fe I just bought. If not I'll have to settle for different wheels but wanted to check before committing.

Btw, this is for an 82 cb750

Thanks!

 
1979 CB750K - 10th Anniversary Limited Edition
1982 CB750K - Cafe/brat project under construction
1977 CB750K - another project!

Member of Moto Guild SF

Offline cxman

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Re: Comstars + gsx-r front end
« Reply #1 on: Apr 22, 2017, 21:36:20 »
if you want to machine  rotor adapters you can use them
1978 CX650 Super Deluxe
1979 XS1100 Special
1974 xl350
1983 cx650 Custom
1973 cb750
1980 cb750
1981 cb650
1982 cb900 c
1974 kawasaki 350 bighorn
1983 GL1100 aspy full dress
1983 GL1100 Nekid
and a bunch of others

Offline J-Rod10

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    • Slipstream Cycle Works
Re: Comstars + gsx-r front end
« Reply #2 on: Apr 22, 2017, 21:49:13 »
Spacers and rotor adapters. Easy work, if you have a mill and a lathe at your disposal. Probably a couple hundred if you don't.

Offline cxman

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Re: Comstars + gsx-r front end
« Reply #3 on: Apr 23, 2017, 08:34:51 »
first one i did cost me over 500 due to the thickness and sizeof the blanks plus axle spacers and bearings and seals ect











i also found since that using rotors from a honda black bird will require way thinner spacers

and more or less  right up to the comstar you have to weld redrill the moount holes the rotor comes with 6 holes and the comstar 5

http://www.ebay.com/itm/97-Honda-Blackbird-1100XX-Front-Brake-Rotor-75E-/152140998673?hash=item236c4f6811:g:JuUAAOSwzJ5XYf5w&vxp=mtr
« Last Edit: Apr 23, 2017, 09:40:50 by cxman »
1978 CX650 Super Deluxe
1979 XS1100 Special
1974 xl350
1983 cx650 Custom
1973 cb750
1980 cb750
1981 cb650
1982 cb900 c
1974 kawasaki 350 bighorn
1983 GL1100 aspy full dress
1983 GL1100 Nekid
and a bunch of others

Offline rs_ss350

  • Posts: 88
Re: Comstars + gsx-r front end
« Reply #4 on: Apr 28, 2017, 12:42:56 »
Thanks guys - glad to know it's possible (anything is possible).  I don't have the engineering skills myself to do this but have friends.  I can turn a wrench like a monkey though. Can you give me the specs for what you did? I have gsx-r rotors already, so i guess the measurements would need to be a bit different than what you have.  Couple hundred would hurt me a lot less than cobbling together a laced wheel with cognito parts so I am very into this.
1979 CB750K - 10th Anniversary Limited Edition
1982 CB750K - Cafe/brat project under construction
1977 CB750K - another project!

Member of Moto Guild SF

Offline rs_ss350

  • Posts: 88
Re: Comstars + gsx-r front end
« Reply #5 on: Apr 28, 2017, 12:44:33 »
What's needed as far as the axle? i haven't attempted to size them up yet before deciding if it's even possible
1979 CB750K - 10th Anniversary Limited Edition
1982 CB750K - Cafe/brat project under construction
1977 CB750K - another project!

Member of Moto Guild SF

Offline rs_ss350

  • Posts: 88
Re: Comstars + gsx-r front end
« Reply #6 on: May 23, 2017, 14:41:19 »
Would anyone here want to make a few bucks to machine up what I need?

THanks!
1979 CB750K - 10th Anniversary Limited Edition
1982 CB750K - Cafe/brat project under construction
1977 CB750K - another project!

Member of Moto Guild SF

Offline CrabsAndCylinders

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  • Careful With That Axe Eugene
Re: Comstars + gsx-r front end
« Reply #7 on: May 23, 2017, 15:37:55 »
What is the process for riveting the adaptors to the original part, do you require special tools etc.? 
Lighter, Quicker, Faster.
ZX-14, 900F x 2, 1100F, R100, CBR600, SR500, GT500, RZ350, KZ1000 x 2, Moto Guzzi Lemans lll, CBX550, RD 350, 750 SOHC police special, RG250, TL1000R, GT750, KTM Super Duke 1290 R, Harris/Z-1, Norton 750 Commando, Green 77 KZ650

Offline crazypj

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Re: Comstars + gsx-r front end
« Reply #8 on: May 23, 2017, 21:14:00 »
Personally I would bolt them on using original mounting holes just use one extra long bolt (if any rotor holes line up)
Honda spent a LOT of time and money 'fixing' the Comstar's. The original wheels with cheap 'stainless steel' (they go rusty) 'spokes often loosened up requiring new wheels under warrantee (I was running a workshop at Honda dealers when the various new 3~4 valve motors and Comstar wheels were launched)
'you can take my word for it or argue until you find out I'm right'
Best thing I ever overheard
"yep, PJ's my boss, he taught me everything I know, just didn't teach me everything he knows"
Brian Morgan, 1982

CB360's,  http://www.dotheton.com/forum/index.php?topic=11736.0
XS650,  http://www.dotheton.com/forum/index.php?topic=11922.0

Offline rs_ss350

  • Posts: 88
Re: Comstars + gsx-r front end
« Reply #9 on: Jun 17, 2017, 22:20:52 »
OK, so i found that Ninja rotors line up almost perfectly with the honda 5 holes.  the question now is what thickness of spacer i'd need to get the rotors to line up with the calipers...

and then, what's the solution for the axle?  The GSX-r is 25mm, the original is 15mm.  Is there a bearing that's going to work in there?  then a 25mm diameter spacer between them?

THanks!
1979 CB750K - 10th Anniversary Limited Edition
1982 CB750K - Cafe/brat project under construction
1977 CB750K - another project!

Member of Moto Guild SF