63 HP stock bore 400ex ? Could this be right?
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Could these numbers be correct? read on...
I have a friend that know a guy thats claiming 63 HP out of his 400ex. Some of you might remember when i first posted this topic a long time ago. Well I figured out what he has done to it ... 13:1 high comp piston, xr400 cam, K&N with no airbox, some porting (not full race of anything), full pro circuit pipe, STOCK BORE, CDI box and geared. Runs on high octane race gas. Could this claim of 63 HP out of it be right? I was thinking more around 45 or so. What do you guys think? He also said he could smoke me of my raptor, is this true?
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63 HP stock bore 400ex ? Could this be right?
HaHa I think its he funny how big and bad he thinks his 400ex is(not starting anything, he is just very cocky). Id love it if he could read what you guys are saying. Thats what Im thinking now pleasure4qt after listening to the responses, 35-40HP. I wonder if he meant 63 HP at the crank but then again you wouldnt lose 25 HP from the motor to the rear wheels.