[400xrider]

i just got a new 2009 400x and looking for some cool stuff to do to it.

 

[Redracer]

Protection wise- Skid plates, bumper, nerf bars.

Performance wise- Exhaust, intake, jetting

 

[tomgodd]

Agree with Redracer!!! Those are very important things. I did those things first.
Later look at the exhaust and air intake. I want to purchase the new HMF comp series. MMmmm! I have a Curtis Sparks so its not on my preiority list though.
Tires are also a nice upg5rade. The stock tires are not that great. I would suggest Maxxis Razr products.
www.maxxis.com

 

[69quadracer]

Get the suspension right before anything.

 

[400xrider]

yea all of that are a grate start i might go with a skid plate and tires and then move on to a exhaust as soon as i get the muney

 

[mud99]

Looks like these guys gave you some good advice. Welcome to the forums.