Quick Piston and carb questions/400EX

[RED121572]

Ok, heres a dumb question thats been burning in my skull for awhile now. I have a 11:1 86mm piston. Its one mm larger than stock. How many cc's does that make my 400 now? Also, since day one, a small amount of gas will fall back into my airfilter, is this common?

Thanks for your input fellas!:confused:

[Jim300ex]

my 330 kit changes from 282 (74mm) to 330 (80mm) so your's should be about a 440 maby.

[ChadEXer]

No Way dude. That aint no 440!!! Its a 406 aint it???

I beleive your right,,cuz an 87mm is a 416.

the gas in your air filter is probably from tipping the quad up and the gas in the float bowl is goin thru the carb back to the filter..

[MR. HONDA EX'S]

It's a 406cc. Because as RICO said a 87mm is a 416. And because RICO, and CHAD says it is!!!!!!!:devil

[RED121572]

Ok, we dont have to get violent about this. lol

A 440 would be a 89mm? Is that right?

By the way, anyone gotta answer for the carb part of the question too?

[ChadEXer]

I would say the gas in the airfilter is NOT normal. i tip mine all the time and i have never had that happen. maybe your carb isnt completely closing all the way????