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View Full Version : FMF Power Core 4, are they any good for a 400EX?



speedracer350X
06-07-2005, 03:00 AM
I know most everyone here says HMF, but I see Golden West Cycle is running a special, silencer, K@N, pre-charger and jet kit for $300, which seems like a good price to me, since most silencers are close to $300 anyways. That' basically all the mods I'm gonna do to my 400, mainly for reliability and longevity reasons. Any ideas? Thanks!!!

06-07-2005, 06:26 AM
I dont under stand the concept of the slip on, you get in trobble for the noise of a full system with mild proformance, for the extra little dough you get a big proformance gain.

nowukno
06-07-2005, 06:35 AM
actually the difference in performance between a slip-on and full system are not that much , unless you plan on doing some serious engine mods in the future , get the slip-on and i have never owned a fmf myself but a friend recently came in with his raptor and had a fmf powercore 4 and i thought it sounded great but i could not tell you how much of a performance gain it gave since it was my first time on a raptor but he said that it gave it a nice gain.

Rico
06-07-2005, 07:22 AM
I ran a powercore 4 many years ago. It was a nice slipon that gave decent gains and was not overly Loud. I say go for it...:macho

FoxMxRiders
06-07-2005, 10:10 AM
my friend run a powercore 4 slip-on and its loud but have a good sound :devil:

troutman561
06-07-2005, 10:24 AM
i run the powercore 4 and love it.. good gains and have gotten many compliments on the way it sounds..

bonified5
06-07-2005, 10:34 AM
hows the sound and performance compare to an hmf? anyone got pics?

troutman561
06-07-2005, 10:38 AM
not many people run hmf around here so therefore i have never raced one... have heard one once it sounded pretty good tho.. i guess its just a preference.. i know its better than the the Wb e series which everyone and their mother runs on their 400's around here cause it won the dirt wheels pipe shootout... but i like the powercore 4 id day buy that

400exrida06
06-07-2005, 04:00 PM
What about the titanium 4?

johnnydufus
06-07-2005, 06:04 PM
i had a powercore 4 on my raptor and it sounded wicked and it gave it a very nice power gain. i now run a big gun on my 400ex and it sounds quite nice and has a very nice bottom end-mid range

Speedy81304
06-07-2005, 09:34 PM
i have put a powercore 4 and the FMF powerbomb header on the 400ex and i say you can feel the power diffrence, now with the piston and cam. I know theres more power hiden in there so some more fine tuning and ill have the 400 the way it should have been built.

jokerman_28
06-07-2005, 09:50 PM
my old man's running it on his completly stock otherwise 400 and i can feel a difference. it sounds pretty good too.

speedracer350X
06-08-2005, 04:34 AM
Thanks for all the advice. I have a Cobra Jet pipe on my 350X 3 wheeler and it was way to loud until I got a "Sparky" spark arrester for it, now it's down to a tolerable, nice sound level. I'm not all for overly loud pipe, such as the neighbor down the street who has a TC shorty on his Yamaha 450. I'm about ready to grab him by the neck. People, noise does suck and it will bother everyone if things are obnoxiously loud. Anyways, I'm going to keep my 400 stock, I just want to let it breath a little better, maybe it'll wake it up some. That's basically why I'm not pushing for a full system, don't really plan on digging into the motor. For real though, my friend has a full WHite Bros. that he put on his 400 back in 2000, and I think it sounds decent. I guess I just want to be a little different. Thanks again for all the help!!!

kamikaze_rzrbak
06-08-2005, 10:28 PM
i have a powercore4 and love it, i can definetly feel the difference in power and it sounds great too

400exrider26
06-09-2005, 04:21 AM
how do they compare to hmf? what about noise comparisons?

VA400EX
06-09-2005, 09:05 AM
I cannot compare my FMF to any other exhaust systems because I just bought my quad with the FMF already on it but I am very pleased. See http://www.exriders.com/vbb/showthread.php?s=&threadid=164936

I think it sounds real nice but I don't think it's too loud and it pulls real nice.

HIPPYHUNTER
06-09-2005, 09:28 AM
I have a fmf Ti 4 and HAD a power core IV before that. I like the Power Core IV better. Less loud,includes a spark arrester screen & better built.