[whipit9]

2004 crf250r engine rebuild put in a hotrods stock stroke crank all new bearings new cylinder stock bore j&e 13.5-1 piston 2007 ported cylinder head. Should we run a 2007 base and head gasket or will the 2004 one work? I see they are a different part number. I also see that a lot use 15w40 t4 rotella in the motor and trans is that a good idea. Or would 5w40 t6 rotella work ?

Thanks!

[crfsonly]

we recommend matching the head gasket to the head and the base gasket to the cylinder.

ken

[whipit9]

what about the oil?

[crfsonly]

i don't make oil recommendations other than what Honda recommends. in my own bikes i run Rotella T synthetic on the engine side and Delo400 organic on the trans side.