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engine work
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Posted by: 400ex#18

For the money, what would the best thing be to purchace? I want to get more power throughout, and i am running a stock 400ex, with HMF exaust, and a 205 main jet.

Posted by: dirtriderex

Do you mean an FMF, otherwise I would get a k&n airfilter. Besides that there is nothing you can really do besides maybe taking the choke off. I'm just being patient and waiting for Honda to come out with a new quad.

Posted by: speedy400

yeah remove choke and airbox lid, free, after that, a cam and piston.dirtriderex- I think he meens HMF, its a different brand

-darren

Posted by: mikeboone

A 205 main jet? WTH...What brand of jet is that? Dynojet? My mech. has a high built 440ex and only runs a 195 dynojet--

Posted by: GNCC#829

I was thinking that 205 seemed a little huge too.

Posted by: GNCCer

a 205 even a 195 main jets no matter what kind there are, are both way too big there should be no reason for anyone to ever run more than a 170 to 175 main in a 400 ex no matter what motor work is done to it.

Posted by: 400ex#18

Yes it deffinately is a 205, and it is a HMF Exhaust. I am running a k&n filter allready, and i have the lid off. It is a dyno jet, jet. The recomended main was a 200, and i took my lid off, so therefore i run a 205 now. I just want more power, and was thinking of getting a high compression piston, and running race fuel. Any other ideas?

Posted by: Bill Fuller

Lean it out some.Are you positive it's a 205?Put a cam in it and change pipes I would get a Sparks.Also Try a JE piston 416,I love mine it ripps I only run a 150-155 jet.

Posted by: Bill Fuller

Oh yea lose the K&N filter you'll understand after you have replaced the rings a couple of times.I use a UNI filter and have had no troubles.

Posted by: JUSTINcredible

race fuel wont do anything for you unless you have the motor work and high compression motor

Posted by: Sick0

Whats up austin, Best mods for the money is: JE 416 10:8 piston, Hot cam stage two, Carb or ateast remove chock in stock carb, Port and polish, get rid of the air box lid, get a K&N filter skin. Things you may also want to get a heavyduty timing chain, heavyduty valve springs, And get a better clutch set up.

Posted by: 400ex#18

hey choon nothing up here... but hows the quad? and how much will this **** cost me for my quad?

Posted by: Sick0

quote:
Originally posted by 400ex#18
hey choon nothing up here... but hows the quad? and how much will this **** cost me for my quad?

ask aaron, see what he can do for you.

I still havn't look at it.