Jump to content
Sign in to follow this  

280cc kit help

Recommended Posts

Hi guys, I have some questions for you guys. First of all a have a 1997 XR250R, and a decide to put the 280cc kit on it. I bougth a Wiseco 77mm piston and I rebore and hone the cylinder with thumper-racing people. My first question is: Which is the exact bore of the cylinder after rebore? is 77mm exacts?. I ask because I think that the piston feels loose inside the cylinder, I know that between the cylinder and the piston should be a gap (0.05mm).

For all the 77mm pistons, the machine shop rebore the cylinder at the same diameter?

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Reply with:

Sign in to follow this  

×