I'm putting together a 250R to rip around on the snowmobile trails this winter. Does anyone have a jetting suggestion? I run the stock (145 I think) in the summer. What size would be a good starting point for say 30 degrees?

 

Go BIG im running a 175 with the needle in the center. The temp is around 0 ot-15 C. Go big then work you way down its easy to go lean in the cold weather, and damage your motor.

 

i live in mn and i have a 165 or and its great! (havent owened it long enough to see more than 5in of snow but its still cold)

 

Thanks for the replies....I'll start with a 175 and work my way down(I hope) from there.