400ex piston kit choice je or wiseco

[bradrychlik]

can someone please give me some advice on what to choose. 87mm, 88mm, or 89mm piston kit, je or wiseco

thanks

[400ex28]

JE

[jak1389]

get the je 87mm 10.8:1 comp piston. we good power. wiesco's compression ratios are not accurate when it comes to the 400ex.

[bradrychlik]

what has more horsepower?
416 426 or 440 kit
what is the best compression to use?

[03pissedoff426]

i like the 426 88mm im using the JE 13:1 piston and it was mean, before my last rebuild. now i need a new connecting rod.

stay with a lower comp. piston or you will be rebuilding your bottem end as i am

[bradrychlik]

thanks for the advice

[underpowered]

i think the 426 is the best bore for the 400ex. i have a JE 11:1 426. i would stick to about 11:1 comp., you can still run 93 pupm gas and run great.

[IRONMIKE113]

so u would say the 426 is better out of the three that answers my question,do u anyone who sells a package deal with 426 kit .:D

[426ex]

I'd definitely say the 426. Mine has a 10.5:1 comp and I haven't had a bit of trouble...my son though has a 12:1 in a 440 kit and the bottom end locked up this weekend. We'll be rebuilding this week looks like.

[400exrider707]

I have a JE 416 10.8:1 piston for sale if anyone is interested.

[ommkevin]

is it the quad or the motor

[400exrider707]

Originally posted by ommkevin
is it the quad or the motor

???:confused: Im not sure what your asking here?

[bradrychlik]

THANKS GUYS, I CHOOSE THE JE 416 KIT FROM C&D RACING, GREAT PRICE

[03pissedoff426]

smart move, i hope you like it!!!