Has anyone put one of these Dyno jet kits on there machines. How do they work and is it worth it. What is the cheapiest best mod to do?

 

I have the Dynojet jet kit on my 400 and I love it. I had it installed at the same time I put my new FMF slip on pipe on. I can defenitely tell a difference. The cheapest mod that I have done is a 14 tooth sprocket. I payed about 20 dollars for this piece and it has made a noticeable difference. This mod is not for anything other than trail riding. It does reduce your top speed but you get a lot more low end power.

00' 400EX FMF Powercore IV, Dynojet kit, 14 tooth front sprocket.

 

no not just 4 trail riding...Duning too... My cheapest mod was my free stickers..hehe no really it was the Curtis Sparks Advanced Timing key.. Best bang for you buck.. increases HP and Trottle response.