kdx jetting

[1990kdx]

what the jetting be for a 1990 kdx with fmf pipe, pro circuit spark arresting silencer, and air box mod. the alitude is 1000 to 2000 feet. the temp is about 70 degrees. thanks

 

[julien_d]

155/45 is a safe place to start. You'll need to jet it to get any closer.

 

[1990kdx]

ok i will start with that thanks for your help.