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I bought a kfx 400 about 2 months ago. I have a vortex twist throttle on it so far....not much I know.....Im getting an HMF exhaust eventually. I also want to know what all I would need to add to my quad when I get the 453 big bore kit. I am welcome to any sugestions........
 

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I bought a kfx 400 about 2 months ago. I have a vortex twist throttle on it so far....not much I know.....Im getting an HMF exhaust eventually. I also want to know what all I would need to add to my quad when I get the 453 big bore kit. I am welcome to any sugestions........
[/b]
Cams, heavy duty cam chain, thumpertalk manual cam chain tensioner, DRZE HD valve springs, full exhaust system, better filter/air box, a better carb, and a good ignition. On the carb I run the $170 04/05 450R carb and I love it. You could also run a 39, 40, or 41mm FCR which will improve the throttle response but not the top end power (over the 450R carb).

Have fun!
 

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Kind of off subject but............IMO, and my own experience i bought a 400ex last year and thought it would be fine and i had no desire to buy a 450. After spending some money on it..... boring, exhaust and the works. i found out that i should have bought a 450 and a matter of fact going to buy a kfx450 soon. So what I'm saying is i wouldn't go and spend a bunch on engine boring and other things unless you either have enough money or you have no desire to buy a 450, because i really, really wish i would have bought a 450 and hope you don't make the same mistake.
 

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well he has a bot of an advantage though because a stock kfx400 will smoke the most modded 400ex you can find
 

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I agree. A modified KFX/DVX/Z is pretty quick. If you are not going for balls out speed, you may be happy with a 400. They are great trail machines and are very reliable. Different strokes for different folks. Thats why they make so many.
well he has a bot of an advantage though because a stock kfx400 will smoke the most modded 400ex you can find[/b]
 

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<div class='quotetop'>QUOTE (KFX 700 @ Feb 28 2008, 02:45 AM) <{POST_SNAPBACK}></div>
I agree. A modified KFX/DVX/Z is pretty quick. If you are not going for balls out speed, you may be happy with a 400. They are great trail machines and are very reliable. Different strokes for different folks. Thats why they make so many.[/b]

Agree completely. I had a Z400 with full exhaust, jet kit with the airbox lid removed. It was an excellent bike on the trails, comfortable, forgiving, reliable. With the basic mods it really opened it up quite a bit.

check out these guys....http://www.z400central.com/invision/
tons of awesome info and great guys.
 

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<div class='quotetop'>QUOTE (mejean450r @ Feb 24 2008, 12:44 AM) <{POST_SNAPBACK}></div>
well he has a bot of an advantage though because a stock kfx400 will smoke the most modded 400ex you can find[/b]
I'd probably rather have a z400 with a 450 kit or so that is properly tuned than my kfx450. They are just all around bad ass bikes. But, watch some of the older huevos movies, you'll change your mind about what you just said lol.
 
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