Young lad bought a 95 klx250r runs 20 mins pipe goes cherry red and problems idling running stock jet 1 1/2 turns out on pilot screw lid is off air breather and a crank breather K&N filter.Stock exhaust.Any body have any ideas?

 

im thinking maybe its runnin lean..... maybe something is clogged in the carb??? but im no expert .....

 

Lid off with stock jet? I would say it is running lean!

First thing to do is to put the lid back on.

 

Yea sounds lean, or maybe the pipe is plugged.

 

Lid back on and check the pipe. If it has been setting up for any length of time, dirt dobbers may have tried to set up shop in the pipe.

 

Thanks that's where we started but it up being a worncam chain