hey guys i am thinking about getting a 06 crf450r but i want to know more about maintenance. atm i have a 06 ktm 250sx i have only had it for about a month but i think a 4 stroke might be better for me. the guys at my local bike shop said that my sx would be alot cheaper to maintain because the crfs chew valves and something about tappet clearance. so could someone tell me what needs to be done and how often i would do all the work myself cause dad is a mechanic so he will help me. im am doing a bit of racing and i do alot of riding in the bush. do you think it would be cheaper than my sx. any help would be great
thanks tyson