What 400ex Kit 440-426-416

[HiZ]

What kit to use for the best performance gains?

Head work no cam just headwork, exhaust, and high compression piston, just which one?

[onefiftyone2003]

i just bought a 440ex, and man I love it it's got tons of power...


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2000 440ex, stage 2 hot cam, twist throttle, maxxis razr's all around, uni- air filter, nac's rear breaks, whitebros. E-series slip on, race cut fenders, renthal bars, ITP rear rims,

[Teufel]

I like the WIseco 440 kit , I would also recommend throwing in a hot cam , with some port work it makes for some awesome power gains. I just completed 2 of them and the guy's that own them love the set up:macho

[Natertot426ex]

There are a lot of threads on this subject. I like my 426 and hotcams stage 2. Do that and a port job and you will have a screamer!!

[quadkrazy400ex]

i was thinking about a 415 w/ je piston 10.8:1 kit from powroll with hotcam stage 2. would i benifit more with going with a 426? i was not going to get the head ported is this a mistake. and last will the stock carb keep up with the larger displacement?

[Natertot426ex]

Going with the 415 will just allow you to bore it out one more time after the 415. 426 does get a little hotter though since the sleeve wall is pretty thin. The port job will help out a lot. The stock carb will work just fine as well. :D

[quadkrazy400ex]

so the mild port or race? i do quite a bit of duning in little sahara oklahoma, and i am constantly riding hard.

[Natertot426ex]

I would go with the race port.!!!

[cals400ex]

Originally posted by Natertot426ex
I would go with the race port.!!!



who ported yours??

[Natertot426ex]

The guy that ported mine is here in town that used to race moto cross on a dirt bike and used to work at a cycle shop here in town. he is a very good mechanic.

[quadkrazy400ex]

do you recomend any dealership for the race port? i was thinking about profab


www.profabatv.com

[BIGRED400]

416:macho