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View Full Version : Jetting recomendation



IcutMetl
04-22-2009, 07:16 PM
Just trying to get a baseline as far as jetting; at least for break in.

Previous setup:
.020" wiseco piston, stock cylinder, no porting, P.T. Hi-Rev Pipe, no airbox, K&N with outerwears. 50:1 golden spectro on pump gas, 38mm PJ; not sure about the needle, but the main is a 160. Started easy, warmed up and ran out good. Never fouled a plug, and the plug was clean with no major buildup. Very little smoke.

Soon to be:
.060" wiseco piston, stock cylinder, midrange portig, FMF Fatty pipe, airbox with vented or no lid (havent decided), 40:1 Klotz Super Techniplate on pump gas; same 38mm PJ. I wouldn't mind breaking it in rich, but what jets should I buy to trim it in with?

Thanks for the help guys!

Honda 250r 001
04-24-2009, 09:24 AM
mix at 32:1, and run a 180 main to start. and 50 pilot

IcutMetl
04-25-2009, 07:06 AM
Thanks for your help; I appreciate it.

Looks like I have a 55 pilot jet currently. Would you still reccomend getting a few above and below to be safe?

I found the chart below elsewhere which may be helpful to other people too.