Question by jimmy: Is it necessary to change the rings and piston on a 2 stroke every 40 hours?
Im buying a 2 stroke dirt bike, a yz 125. They guy said I need to change the rings and piston every 40 hours but I have never heard of that. My friends have been riding dirt bikes for ever and they said on his 100 he has over 300 hours on it and never had to do that. What should I do? listen to my friend or the guy im buyin it from?
Answer by Zack
Every 40 hours would be ideal if your a motocross racer and you ride the bike as hard as you can everytime your on it, but if you just do a lot of trail riding/occassional jumps then no not every 40 hours. It just depends on how hard you ride your bike. I changed mine once a year before riding season every year and I dont even think I needed to do it that much, I just did it to be on the safe side.
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