what do u guys think about this

[m.h.s.c.#527]

alright what is the best oil to use right now im usin 10w-40 all year should i run 5w-30 or 10w30 or stick with what i got also keep in mind the only time i ride is when i race xc

[250X_project]

I'd run 5-30 with this cold weather.

[250X_project]

Also what size is your 250EX, bored and stroked?