I just bought a 2003 KFX 400 and its mostly stock. It has nerf bars, front bumber, full skidplate, Renthal Fat bars and Razr's all the way around. It has also been dropped one tooth in the front. I have a warrior and its kind of like my old faithful but i want to put some stuff on the 400 too. What would be the best exhaust setup for it? And what kind of combinations could i throw on it without spending a whole lot of money? I was looking at a Big Gun rev box, would it be worth the money?

 

personaly i dont know about the rev box, but ive got the dmc afterburner 4 slip on and made a custom header for my dvx400(same bike) it runs really good but you will probably have to jett it

 

I have a '03 and have a full yoshimura exhaust, jetted and k&n filter kit and love it. Good power and sound. Mine has a White Bros rev box and like everything except the reverse rev limit is still there.

 

I was leaning towards the yoshimura my buddy has it on his 400ex and i love the way it sounds. This thing is totally new to me i've been riding my warrior for a year and when i get on this thing it feels like night and day.

 

Screw that, go LOUD!!!!!!!! HMF all the way!!! LOL, sorry , had to do it. All the pipes mentioned above are good. Its a matter of preference. The Big Gun rev is the same as the Procom, take your pic of which you want.

 

check the 03 frame around the front shocks to see if it's been guessted ,weak area on the 03

 

yea been thinkin about an exhaust setup myself but i dont much care for all the extra noise.

 

One of my buddies is an HMF man all the way and i cant knock it because it does sound good and it is loud as hell. My buddy works at the local cycle center and races GNCC and he keeps telling me to go with LRD. I've just never heard one...

 

LRD are good, just hard to come by.

 

Definatly go with the full Yosh set up.Those pipes are mad and tuned specificaly for the suzuki engines. They use them on all their racr bikes.