Kurly154
03-01-2007, 07:35 PM
I have a 87 Honda 250X. Stock jets are main 125 pilot 35. I have a 38 pilot in it now. I just ordered a FMF Powercore4 full system and wanted to know what main jet I should run at 937 ft elevation with the air box lid off? I was thinking about a 128 or 129. Thanks in advance.