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View Full Version : What's the biggest i can go????


stuntman_12
08-09-2006, 04:12 PM
What's the largest size piston kit i can get w/ out having to get a different sleeve? I am about to rebore and want the biggest thing that'll fit in a stock sleeve. Is 407cc the largest i can do? I'm about to order....:D
400exstud
08-09-2006, 04:23 PM
426
02440exkid
08-09-2006, 05:06 PM
x2
RiderTRX400ex
08-09-2006, 08:25 PM
yes 426, i think thats .120 over, for some people they have problems and for others it works fine..
400exrider707
08-10-2006, 12:45 AM
You can fit a 426 piston in, however it is the last bore on the stock sleeve, and the cylinder walls become very thin, which can cause reliability issues. I would do a 416 personally, it is the largest reliable bore IMO on the stock cylinder.
firefighterjosh
08-10-2006, 01:44 AM
Go 416. They have proven reliability and I don't think you will notice any diffrence going to a 426
underpowered
08-10-2006, 06:05 AM
go with a 426. mine has been together for three years now with no real problems. only a few head gaskets.
stuntman_12
08-10-2006, 06:15 AM
I ordered the 416 Wiseco... and it comes w/ a gasket kit made by Namura. Is that a good gasket kit? I paid 144$ for it to be at my door. I get a bore and hone job for 35$!
H400exRacr
08-10-2006, 02:59 PM
you shouldve just spent the money and bored and stroked it to a 500cc fire breathing monster.......show those yfz's whos boss my 465 with smoke a yfz even
400exstud
08-10-2006, 04:30 PM
Originally posted by H400exRacr
you shouldve just spent the money and bored and stroked it to a 500cc fire breathing monster.......show those yfz's whos boss my 465 with smoke a yfz even

For that much money he could've sold his 400 and bought the yfz