This winter i am going to rebulid my 2000 ttr 250 is it best to use all yamaha parts or are after market gaskets sets ok whats best just picked up a wisco piston looking for cams who makes cams and stock or hi performace whats best here in utah we have lots of desert to ride in so i can do alot of wide open rideing i am thinking oil cooler please let me know what you guys think thanks