my buddy has a 87 250r the motor is stock with a bills pipe but it came with a 38 mm air stryker carb what should the jetting be set at

 

Thats vague, could you clue us in on mods, where you live, etc. Is it running rich or lean right now. What is the current JEt. My advice, find someone who knows how to rejet, and have them do it.

 

it has no mods its stock i said that already and the elevation is 1450 ft what should we start at

 

This is my bike it has a bills pipe on it, thats the only mod. I just got the carb and im not sure where to start with the jet. thanks

 

Start Fat on the main. Id say if those are the only mods you guys have then around 165. I almost garentee this will be to rich but every motor is diffrent, and its not worth leaning it out. Keep doing you plug chops and go down by one size each time. If you do this then you WILL get dialed in perfectly. When i had my 38mm carb on my bike with a pipe, and filter i was at about 155- 158 in the hott summer. Now im at 165 in 20 degree( a bit rich to be safe) maine weather, and PA shoulnt be to far away from that.

 

thanks for the info

 

anytime bud.