PLEASE READ!!! I have an 04' YFZ with the basic pipe, jet, filter. I have about $800 bucks to blow, What should I do to get the most power for the money?I almost only ride dunes(Reason: buddy has a troy lee addition pred. wit about $2700 bucks in it, and I want to kick his a$$)please comment bros, see you on the sand!

 

New carbs or get it bored out if you have the time to yank it apart (and never plan on racing in a 450 class). This is assumming you already have some nice tires.

 

don't forget the free cam-mod...

 

Do you have paddles?

 

head work!

 

boring doesn't help... it may help a little but not enough

hi-comp piston
stage 1 cams
hell maybe even stroke it

 

Can someone explain to me what boring is? and what stoking is?? Thanks im still a noob i know [img]i/expressions/face-icon-small-smile.gif[/img]

 

There's no reason for you to decrease your reliability with a port job, or by increasing your bore and stroke.

here's a simple, affordable way to get more horsepower out of your machine: Buy a high-compression piston and a stage 1 cam and then try running your machine on a mixture of some high-octane race fuel like VP or Cam2 with good pump gas. You will see a noticeable increase without decreasing your reliability and still having a hundred bucks or so left over to change your gearing with a new set of sprockets and a chain. Up the gearing and you'll be able to increase your top-end speed.

 

if u can get your hands on about 1600 u can get a 470 stroker kit (does the works)

 

If u drag race you dont want top end cuze your only goin at the most 300ft (100yrds) i geared down a couple teeth got the portand pollsished head ported intake 470 stroker kit, bore it is to make the cylinder (sleeve) larger in diamater stroking is just geting a shorter rod and changing the crank to change the stroke. I have no problems beating the predys