I recently bought my first quad; a 2000 400EX. I need a little help with the mods. Everything is stock except for a Motion Pro twist throttle. I cant do much to it because i am only 17, and i no longer have a job. Please tell me anyway to make my quad faster, lighter, all around better using the least amount of money as possible

 

Remove your parking brake, maybe remove your airbox lid and rejet... Talk to 86atv250r about how to modify your stock exaust...

 

Try a 14 tooth counter shaft sprocket, bout $30 for a decent one and will give you lots for low end, lost a little top end. I think it's work the trade off.

 

UNI Filter, moded air box lid, xr250 rev box and 14 tooth sproket and you will be happy. Still have money? Then get an exaust. Or if you cant ge tthe whole thing get a silencer. Checkout http://www.Gthunder.com they have a sweet exahust. Good luck.-
Eddie

 

UNI Filter, moded air box lid, xr250 rev box and 14 tooth sproket and you will be happy. Still have money? Then get an exaust. Or if you cant ge tthe whole thing get a silencer. Checkout http://www.Gthunder.com they have a sweet exahust. Good luck.-
Eddie

 

UNI Filter, moded air box lid, xr250 rev box and 14 tooth sproket and you will be happy. Still have money? Then get an exaust. Or if you cant ge the whole thing get a silencer. Checkout GT thunders sweet exahust. Their site is the same as their name. Good luck.-
Eddie

 

I'd say the 14 tooth sprocket is definitely the best bang for the buck. Also, you can modify the airbox lid to help out airflow a little, and rejet to compensate. What I did to my airbox lid is drill a 3" hole at the rear of the lid, and put a 3" ABS pipe vented end cap (available at hardware store) in the hole, which made a 3" by 2" deep port into the airbox. This keeps the big chunks outta the airbox, and also keeps water and mud from getting directly on the air filter (since the 'port' is behind the filter). This will also be much cheaper, and should flow more air than half a dozen of those 1" filtered plugs everyone is using.

 

Thanks for all the replies. I am going to do the 14 sprocket and the 3" air box hole, but, one last question for now, How do i rejet?

 

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uni-filter and biggun exhausts!!