If the origional valve's have never been adjusted you might have some time before they need to be replaced lol. The origional titanium valve's have a thin hard coating, once that coating wears off they will wear out fast. That's why keeping the air filter clean Is so Important. I put stainless valve's & springs In my 450 over a year ago, and just now adjusted them for the first time. I had a guy here In Michigan cut the seats after learning that you don't just slap valve's In without cutting the seats![]()
Ron Hamp Cycle!!! He Is a genious with any modern high reving 4 stroke![]()



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