lets talk valves

[bens250ex]

ok so im just curious how needy is the 400ex on upgrading the valves when using a big bore with a hot cam? i have been running it for about 3 years with stock valves and never adjusted them if this something i should do? should i upgrade while i have it apart or just check over the stock valves?

[steve181]

you must baby your quad to havent touched the valves in 3 years

yah, get new valves

[timmy400exfast]

yeah that would be a good i dea lol

[bens250ex]

i don't babby it, when i ride it its usually hittin rev limiter. its the girlfriends bike so she don't rev it too much. what should i do valve wise springs and valves or what? rockers ? is there a whole kit out there some place or do i gotta buy the valves seperate?

[steve181]

Originally posted by bens250ex
i don't babby it, when i ride it its usually hittin rev limiter. its the girlfriends bike so she don't rev it too much. what should i do valve wise springs and valves or what? rockers ? is there a whole kit out there some place or do i gotta buy the valves seperate?



get some kibble white valves and hd springs to be safe

[bens250ex]

anyone know of a whole kit?

[coreo5]

make sure the cam chain tensioner is good before putting valves in it or you will end up like me.....put 4 brand new kibblewhite valves in the head...started it up riding it around tryin to get the rings to seat and boom. jumps time and piston smacked both exhaust valves....now i have two bent kibblewhite exhaust valves as souveniers in my room

[brokenmike]

I still have the original valves in my 2001 440ex. my valve lash has been the same for about two years and still are not out of adjustment...I don't baby it either