- Location
- Sweet Valley, pa
250f's are harder on valves for obvious reason. your wide open alot more, so they are revving more. i am on the rev limiter ALOT and put a set of vavles in in the spring and they were fine all year. the first time you have the motor apart have someone cut the valve seats so they allow the valve head to hit with alittle more surface area, it makes huge difference on the kawis. the first year i had a 250f i put three sets of intakes in it, now i do them once a year and they never move....if you want next time i got home i will tell you teh specs on how i had mine cut, i would tell you but i am at school.