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View Full Version : 400ex vs. 440ex


ridesa02400EX
06-22-2003, 03:30 PM
i didnt think that havin a 440 would make much of a difference but i dragged raced my friend that has a 400 with a slip on and air filter and i have a 440 with a slip on and air filter we were dead even until i hit fifth gear then i just took off i was just really suprised i didnt think it would be much faster than a normal 400
mikeboone
06-22-2003, 03:37 PM
If you are running the stock cam and a low compression piston you probably only make a few more hp than he does. Was this on dirt or grass?
ridesa02400EX
06-22-2003, 03:41 PM
this was on dirt i guess that little bit of hp really helps
JD400exrider
06-22-2003, 04:08 PM
rides02 Did CHM build it. Running the XR cam or something different.
ridesa02400EX
06-22-2003, 04:12 PM
ya CHM built it they put a 440 kit in it and a chm slip on im just running a stock cam how much did it cost you to get the porting done by CHM?
twisted threads
06-22-2003, 04:30 PM
ridesa02 just think you haven't even started makeing any power yet.;) wate till you get a cam and head work.
ridesa02400EX
06-22-2003, 04:32 PM
ya i cant wait i have 200 bucks but ive gotta put that into my truck :(
quader400
06-22-2003, 04:39 PM
alright ive asked this so many times but never gotten a straight answer. how much would it cost to have a 440 installed, cam, valve springs, and a port and polish job. and does the 440 add more top speed or just hp? thanks.
06-22-2003, 06:53 PM
Originally posted by twisted threads
ridesa02 just think you haven't even started makeing any power yet.;) wate till you get a cam and head work.

what he said :)
mikeboone
06-23-2003, 09:53 AM
Originally posted by quader400
alright ive asked this so many times but never gotten a straight answer. how much would it cost to have a 440 installed, cam, valve springs, and a port and polish job. and does the 440 add more top speed or just hp? thanks.

That price can vary SEVERAL hundred dollars depending on the builder. The parts will be much more than the labor but you may be able to get by for around $1200 for parts and labor. You got: $200-250 for sleeve/piston, $140-160 for cam, $120-140 HD valve springs, and $200-300 for port/polish head. You need to find a reputable builder that you trust to do the install at a price you can afford. If your on a small budget; get the bore and cam maybe do the HD springs and ported head later.