Satanic Mechanic Forum Index
Author Message

<  Performance issues  ~  Cr750

peter c
Posted: Wed Dec 06, 2006 4:56 pm Reply with quote
Rookie Rookie
Joined: 06 Dec 2006 Posts: 5 Location: UK
Hi folks, wer'e building a cr750 for classic racing in Uk and Europe. What we need are some sensible priced pistons to keep within 750cc class. if we bore to +1mm to get max capacity with stock pistons what model piston would give the best comp ratio as a starting point. We already have yoshi cam,big valves ,springs and some cr carbs.

regards peter c
View user's profile Send private message
Satanic Mechanic
Posted: Fri Dec 08, 2006 2:09 pm Reply with quote
Moderator Moderator
Joined: 04 Sep 2005 Posts: 309 Location: Munich, Germany
Hi Peter,

congrats to your project and welcome to the forum!

The CB750 F2/F3 ('77/'78 ) stock pistons have a higher dome than the earlier models (see http://www.satanicmechanic.de/board/viewtopic.php?t=93). With an earlier model's head you should get around 12.5 c/r, but you will have to carefully check the clearances. I haven't found the pistons at David Silver or CMS, though, hopefully they are still available from Honda.

Hope that helps!
View user's profile Send private message Visit poster's website

Display posts from previous:  

All times are GMT
Page 1 of 1
This forum is locked: you cannot post, reply to, or edit topics.

Jump to:  

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum