Originally posted by 3434
Hope you didn't bet on it. OS part# 21451010 is the crankcase for all three.
Crap.... so that means the only diffrence between the (P) T and the E/R-Spec is the head and 3 port piston and cylinder.
I wonder if the E/R-Spec is as fast or faster than the (P) T

there so hard to bloody find any suggested shops etc..