hey, i have an 04RM250 that has about 40 minutes on it.. when i push the kick start down slowly, i can hear an air sound on the first few inches of travel.. what is it? ive got a new cylinder on it (with no crack) and it runs simply amazing.. the dealer said it was the intake (i believe) and is completely normal... i want to believe them but im not sure if they just wanted to get rid of me or not? bike starts first kick easily.. thanks dan
After my porting I noticed an increased 'suction' noise coming from the intake...I would believe this is normal but knowing for sure may warrant further inspection. Good luck.