i just bought a 2003 rincon 650 and i changed the oil , new waterpump , all new gear oil , air filter is clean and spark pulg looks good, my problem is , when riding on dirt road i noticed i can only get it to go about 45mph, and when there a slight incline in the road i cant get it to accelerate past 30 -35 with the throttle hamerd down in esp mode nore auto it just doest seem to want ot pull it self any faster in the higher rmps and speeds i know this 650 has more than what im getting out of it , i dont understand has plenty of power down low gets me up the nastiest hills in 1fst gear just cant figure out why it wont accelerate like it should any info would be greatly taken thanks

 

Has atv been sitting any? Try running atv with the air box lid off! Its runs better than I would check the air snorkel for an dirtdopper nest..this will make engine not have enuff air in high gears or harder pulls......Just an thot....Let us know after you do this......