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View Full Version : 425 vs. 440



Sammy_P_Racing
11-16-2003, 08:46 PM
I am curious as to how a 425 engine kit fully loaded with a 11:1 piston, cam, porting, and bore would hold up against a 440 on mx tracks?

roostin_dale
11-16-2003, 08:53 PM
i think it will do great. and if the motor ever blows you have room to go bigger.

Wait for some other people to reply...i dont know alot about 400ex engines...