overbore pistons for the 650 FOUND!

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cgswss10
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overbore pistons for the 650 FOUND!

Postby cgswss10 » Tue Jul 24, 2012 5:30 pm

Just an FYI for you guys. I have been looking all over for over bore pistons for my 650. Well I found some. If anyone is looking for them:

http://www.dynoman.net/engine/pistons/custom.html

totem12
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Location: ocean shores, wa.

Re: overbore pistons for the 650 FOUND!

Postby totem12 » Tue Jul 24, 2012 9:43 pm

i don't need them yet.....but, nice job on the find!!!!

unleashed
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Joined: Mon Jul 09, 2012 1:25 pm

Re: overbore pistons for the 650 FOUND!

Postby unleashed » Wed Jul 25, 2012 7:09 pm

Way cool find man, I could not believe there were no oversized piston & rings sets available for the CB650's. 674cc is a good size for new bore. :wink:
"Silly Rabbit Trix Are For KIds"- General Mills

cgswss10
Posts: 132
Joined: Mon Apr 30, 2012 3:17 am
Location: South east Michigan

Re: overbore pistons for the 650 FOUND!

Postby cgswss10 » Wed Jul 25, 2012 7:43 pm

Just wish they were a couple hundred bucks cheaper.

cb650
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Re: overbore pistons for the 650 FOUND!

Postby cb650 » Thu Jul 26, 2012 8:11 am

All the extras they might be worth it but rather just get the pistons and rings at a cheaper price.
Did you clean the tank out?!?!?!?!

unleashed
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Joined: Mon Jul 09, 2012 1:25 pm

Re: overbore pistons for the 650 FOUND!

Postby unleashed » Thu Jul 26, 2012 8:52 am

Ya really $125 for a piston, rings, wristpin & circlips is not a bad deal. Hell I just bought a(rare) stock Hondaline 300r big bore(76.5mm) piston & rings set for my 84' 250r ATC for $180. I had $650 into the complete top end with rebuilt 34mm Keihin PE carb & full Bassani exhaust but sold it for $970 so I could buy my 81' CB650C. A good trade I would say! :mrgreen:
Last edited by unleashed on Thu Jul 26, 2012 10:26 pm, edited 1 time in total.
"Silly Rabbit Trix Are For KIds"- General Mills

cgswss10
Posts: 132
Joined: Mon Apr 30, 2012 3:17 am
Location: South east Michigan

Re: overbore pistons for the 650 FOUND!

Postby cgswss10 » Thu Jul 26, 2012 3:16 pm

Not saying they aren't worth it, but if they wer a couple hundred cheaper, I could buy a set!

unleashed
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Re: overbore pistons for the 650 FOUND!

Postby unleashed » Thu Jul 26, 2012 9:18 pm

You should email that guy & let him know you posted his parts here on hondacb650.com's website as I'm sure hes going to be, in time, selling some of his kits to members on the board here. He can "THANK YOU" by giving or selling you a set at a discounted price. Its what's "the right thing to do" you just got to make him believe it! :mrgreen:
"Silly Rabbit Trix Are For KIds"- General Mills

cgswss10
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Location: South east Michigan

Re: overbore pistons for the 650 FOUND!

Postby cgswss10 » Thu Jul 26, 2012 10:35 pm

I was thinking a "how to" thread with "after" test results (g)

They also have cams for the 550 (regrinds) I can't help but wonder why they couldn't weld up a 650 cam and used that "race" 550 profile on the 650 blank. Seems to make perfect sense to me...

unleashed
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Joined: Mon Jul 09, 2012 1:25 pm

Re: overbore pistons for the 650 FOUND!

Postby unleashed » Fri Jul 27, 2012 12:28 am

There you go! I believe I saw a thread on like a "German" or "Euro" 50hp cam & also a like 64hp cam as well. It show'd the differances in the lobes & think they were CB650 cams. Volker_P, cb650 or yourself would know the ones I'm talking about.
Ya a "Before & After" thread with video & audio. Get MAC/Jardine to send you a 4 ito 1 exhaust, Clubman to supply the bars, K&N the filters & then the carbs would definetly need to be re-jet & tune'd. :mrgreen: lol
"Silly Rabbit Trix Are For KIds"- General Mills

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Volker_P
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Re: overbore pistons for the 650 FOUND!

Postby Volker_P » Fri Jul 27, 2012 1:41 am

Here you find the "German cam" comparison picture.
Cosky's great (free) online manual: http://cosky0.tripod.com

forum links to common technical issues

joejohn
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Joined: Sat Jul 28, 2012 8:38 pm

Re: overbore pistons for the 650 FOUND!

Postby joejohn » Sun Jul 29, 2012 2:59 pm

Well if any one wants to set up a group buy, I'm in. I was already considering buying a set when I found this thread. :wink:

mikeyboy1
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Re: overbore pistons for the 650 FOUND!

Postby mikeyboy1 » Mon Apr 15, 2013 9:56 pm

if my new rings still use alot of oil I'll be bying a set this summer

scott s
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Re: overbore pistons for the 650 FOUND!

Postby scott s » Tue Apr 16, 2013 6:23 am

cgswss10 wrote:I was thinking a "how to" thread with "after" test results (g)

They also have cams for the 550 (regrinds) I can't help but wonder why they couldn't weld up a 650 cam and used that "race" 550 profile on the 650 blank. Seems to make perfect sense to me...



Just use the 550 cams. Put the 650 sprocket on it and change the tach drive or go with an electronic tach.

salzig hund
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Re: overbore pistons for the 650 FOUND!

Postby salzig hund » Mon May 16, 2016 7:10 pm

Hope this thread ain't dead! After honing my bores, the ID expanded to just about and/or at the wear limit. What should I do?
Over sized rings or pistons?

I mapped the bores as one should, and they all measure around 2.356-2.358".


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