What should i mod???????????

 

Send me the $600 and I will send you a lucky racer charm.....LOL.

 

full system and add a filter to that z. I reccomend a HMF they are awesome [img]i/expressions/face-icon-small-wink.gif[/img]. but ct, pc, yoshi, and fmf are good pipes too.

 

I agree fastest

 

yep, one of the first and easiest ways to tap open the power in any atv is a new exhaust system. however which system you choose may be up to your riding style or how much you want to fork over, i dont have much experience with z400's so i cant give an answer of whats 'best'.

 

The first thing to mod is the engine breathing, not just the exhaust. This requires a low back pressure exhaust system, a K&N filter (or equivalent) remove the air box lid and most importantly rejet the carb to your new system.
Good luck

 

I'd start with the suspension. You can get Works with res. up front and rebuild your rear for $600.

 

Nerf bars, tether switch, K&N air filter w/Curtis Sparks foam pre-filter, Sparks,HMF, or Yoshi pipe(get a quiet pipe).
[img]i/expressions/face-icon-small-smile.gif[/img]

 

exhaust system is a good place to start. [img]i/expressions/face-icon-small-wink.gif[/img]

 

Hey, i jsut orded the whole rossier engineering kit, it comes with the full pipe, dnyonjet jet kit, and air filter, i know that rossier maybe isnt as heard of as hmf, but i gurantee u, u will be satisfied with it, ask anyone on here, they told me they havent heard anythang bad about it, ....a buddy of mine has it on the yfz 450, and he said it kicks A#$... it made his bike so much faster after he got it put on, ....i was goin with hmf, but when i sen wat it did for his bike, i ordered it, u cant go wrong for gettin the whole kit, for 480$....here check it out....www.rossier.eng hope u make a good choice...