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View Full Version : first thing to do to the KFX 400



Dill Pickle
02-20-2004, 02:44 PM
i just picked mine up today.

its really fast stock, but i am going to be adding a pipe jet kit and kn air filter.

i was wondering what the best full exhaust system for it is. most hp and low end gains

thanks

alberndt
02-20-2004, 05:48 PM
My buddy has an lrd full kit and is really happy with it. Its pretty loud, sounds good

beak7707
02-20-2004, 06:00 PM
HMF would be a good choice. If you dont plan on doing any motor mods like cams and piston, the slip on would be fine.

lsittingbull
02-20-2004, 11:34 PM
HMF, Bill Ballance edition?

jbfoco
02-21-2004, 02:19 AM
Sparks is my first choice but HMF and Yoshi are all great pipes

A 13 tooth front sprocket really helps on a near stock bike

Matt756
02-21-2004, 08:04 AM
hmf

popo
02-21-2004, 08:04 AM
Send your Z to me with a credit card. I can fix it up real nice for you. :D

Matt756
02-21-2004, 08:07 AM
Originally posted by popo
Send your Z to me with a credit card. I can fix it up real nice for you. :D
u have the nicest quad i ever seen

elliptic
02-21-2004, 12:20 PM
I like my HMF alot, but hear alot of good things about ct racing and sparks

Matt756
02-21-2004, 12:44 PM
SPARKS WOULDNT BE A BAD CHOICE EITHER THOUGH

jtsurfer
02-21-2004, 04:36 PM
In the exhaust shootout for the LT-Z400 and KFX400 the Pro Circuit won for the best bottom end and it also reached its peak power the quickest. The Ct had the most peak power overall.

batgeek
02-21-2004, 07:15 PM
that was a crap shoot-out...

no air box mods were done to any of the quads. also, jetting was done as per recommended by the manufacturer on the documentation supplied. if none was supplied, the manufacturer was not called and they guessed on the jet setting.

differing numbers are achievable by every one of those pipes with correct jetting and air box modifications.

fyi - i run a CT Sonic full system with a 160 main/stock pilot and Alba Max Flow filter adapter with a K&N filter.

Out_Sider
02-22-2004, 05:39 PM
i'd have to say Alba ;)

Shuee_400
02-22-2004, 07:22 PM
Yoshi

shaff107
02-22-2004, 08:06 PM
LRD all the way. I promise call mike at LRD he will tell u everything u could ever want to know about the KFX he knows his stuff and will talk with all day about whatever!

shaff107
02-22-2004, 08:09 PM
i have a 400ex but i had a yoshi before my LRD and my yoshi just didnt give me the power that it should have. the LRD brought my motor to life i love it. im just guessing but i would think that it would do the same as a CT or Sparks cuz they are pretty much the same pipe if the CT has a turn down. just my 2 cents

Blakey
02-27-2004, 12:31 PM
Reinforce the frame to keep it from cracking..