Does anyone know what jets the 650 has in stock form and has anyone leaned down from stock settings? I ride at a baseline of 3000' and ride in the mountains to 6000' The problem is that I ride from
-20 Celcius to +25 celcius. Any jetting recommendations would be appreciated.
Also, does anyone have experience with "hopping" up the 650 such as exhaust changes etc? Thank you in advance.

 

Stock mains are 138 front carb 142 rear carb. I am pretty sure the manuel calls for a 134 main front and 138 main rear carb for 3000-6000 ft, twoo sizes smaller than stock for that elevation, also 2 turns out on the air screw's stock, try 1 and 3/4 turns out and see if runs better, I have a post on here about my exhaust and other hop-up's.