Jump to content
Sign in to follow this  

High Compression Piston Re-Jetting question?

Recommended Posts

Not sure if this should be in the "jetting" section or not. move if necessary.

but after 12 or so hours a buddy any myself put a new crank, cam chain and new 13:1 high compression piston.

the bike started right up (3rd kick) we were worried though :thumbsup:

just from starting in up in the garage i noticed that it seems to be running lean, i played with the air/fuel screw but that didnt do much. its backfiring a little, and also the revs are hanging. like it takes a little whilte before the revs drop down to idle when throttle is cracked.

what would u suggest i change? main jet, clip etc.

thanks for any input here

Share this post


Link to post
Share on other sites

I am not an expert on this high comp stuff but I know that the fuel mix will have to be changed on both main and pilot circuits. I am guessing that it probably wouldn't be more then one up on the pilot and some needle clip adjusting and maybe a richer main but not sure........anyone else?

Share this post


Link to post
Share on other sites

thanks for giving it a go - anyone else?

can i get away with moving the clip only or is it the main now?

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  

×