i just been thinking about new engine for my savvy and a mate sent me this thread as a link.
whats teh general idea on the fs 40 or the 52 with teh 40 valve springs
is it worth it over a 2 stroke they sound sick but is it worth the money?
if i got one i would drop a slide carby and new muffler on would it be a worth powerplant?

thnx