[img]i/expressions/face-icon-small-confused.gif[/img] my polaris 400 scrambler runs fine at first but when it warms up ( 1 to 2 miniutes) it runs very very badly. you can not get the rpm's up once it warms up. i replaced the reed vavles and tried every carborator cofiguration possible...to no avail. can anyone help me before i burn it to the ground out of frusteration.

 

try the coil before you buy cdi box just to be sure sounds like coil getting hot