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View Full Version : just got a kfx400


taz28
03-14-2009, 07:40 PM
Just got a 03 kfx400 for 1500. It has a tapping sound but it still rides good and it fast. my top speed was 70mph witch i think is good. but i race import and i want to go faster. and i need some where to ride like some trails. what can i do to have more fun.
cataway
03-15-2009, 04:03 AM
a tap or a tick can be many things ,do you know if it has had any mods done to it ?
KAWIRYDER
03-15-2009, 08:40 PM
That tapping sound can also sometimes be the chain slapping on the guide plate. It may also be something loose ,hope you have fun on that thing.
taz28
03-15-2009, 10:18 PM
i dont know if it has any mods what should i do or what should i buy first.
PLCracing
03-18-2009, 08:12 AM
If you're looking to go faster anyways, it might not be a bad idea to remove the head and check over the valve train components along with the timing chain. Always better to check out those little noises before they become big noises with big $$$. Good luck.
taz28
03-19-2009, 08:22 AM
i know how to work on cars but not lil motors. where can i get a manual or should i pay somebody to look at it.
PLCracing
03-19-2009, 09:01 AM
These "lil motors" aren't so bad. Definitly get yourself a service manual. Either from a dealer or plenty of places online. I'm just about to tear into my motor, bought a "Clymer" manual on ebay for about $25. If you've got basic mechanical knowledge from wrenching on cars, you should be able to tackle a top end rebuild with the manual no problem.
k-f-x440r
03-19-2009, 10:25 AM
i would read up on some of the many things you could do then go from there there very basic motors and if u want a big jump in power and feeling i would go for the big bore its a great start on bulding your motor and is quite relieable
taz28
03-20-2009, 06:06 PM
so why don't yall get the 700 and play with that.
PLCracing
03-21-2009, 07:51 AM
From what I've ridden, I think the 400's actually have a better feel and balance to them.
Funny how your GA accent comes out even while writing, if I wanted to say "we all", would you say "wall'?
KAWIRYDER
03-21-2009, 08:07 AM
Now that is funny lol.
taz28
03-22-2009, 10:06 PM
no u just yall
PLCracing
03-23-2009, 07:03 AM
lol, just kidding. Seriously, maybe you can find a friend who has a 700 then ride them both. Maybe you'll like the 700 better, it'll probably cost more to build, but you've already got the 400 which can be hopped up pretty easily. Everyone has thier own preference though, I wouldn't spend the time and effort building up the 400 if you're just going to switch to a 700.