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View Full Version : HP Rating of a 440


09-19-2001, 06:13 PM
If I was to take my relatively stock 2001 400ex, add the 440 kit, what would be the est. HP?

If anyone would know, It would be much appreciated..

Thanks.

Biglazyass:huh
09-19-2001, 06:16 PM
well with all the mods in the 440 kit maybe 38
trx400ex
09-19-2001, 07:01 PM
up to 45 , but regular money will get ya around 41
400exBro
09-19-2001, 07:18 PM
If you go full out and spend a lot of $$$$$$$$$$$$$$ you can get up to 50 hp out of her i guy i ride with put a whole wack of stuff on her and put it on the dyno and got 48 hp but the pipe he has isn t the best pipe around lol
400exBro
09-19-2001, 07:20 PM
Thanks fellas, I am just wondering what would give me the best bang for the buck. Havent done much here now, Twinair filter, Dynojet Kit and a 14 Tooth in the front, should get the exhaust happening I guess. Not looking for a drag machine, more of a torque machine.

Any info would be great..

Thanks

Biglazyass:huh
400exBro
09-19-2001, 07:24 PM
Ya that sounds good but if you do get a exhaust the best troque one is the big gun or yoshi in my opion
lata
400exBro
nakomis0
09-19-2001, 07:56 PM
Raptakilla14, is right your toping out at 38max hp.

With my mods I have about 34-38hp.

This is to the ground HP, Hp from the motor would probably be about 10hp more.

Heres a link to a built 440ex dyno....

http://mobiledyno.com/sys-tmpl/dynoruns/view.nhtml?profile=dynoruns&UID=10002
bsr
09-19-2001, 09:57 PM
Does anyone know the torque of a stock 400ex ?
MOFO
09-20-2001, 05:21 AM
For some reason 19lb/ft comes to mind. I think I read that somewhere....dont quote me on it though. ;)


Eric
MJNOVA
09-20-2001, 08:53 AM
I am getting 37.5-38.5 at the axle. 440 Sparks cam, 1mm larger valves, 39FCR, sparks x-6, 50 pilot-172 main.

We were able to get 1.2 HP by pulling the air cleaner.I always run a standard Foam--

Our Dyno bolts to the rear hubs. Stock 400EX without lid. 28.6
oynot400
09-21-2001, 08:20 AM
I don't know where some of these guys get those numbers but with my mods I got 35 hp at the counter sprocket.
MJNOVA
09-21-2001, 09:10 AM
My numbers are from Roush Racing. We do dyno testing for everyone from Ford-GM-DCX-Toyota-Honda-Arctic Cat-And all of our Nascar Teams. Numbers from Dyno to Dyno can be different so in my opinion the best way to test is to get a run at the beginning(before mods) and then each after. My bike started out at 28.5 HP(6 runs) and is now in the High 38's to 39.