I wish I found the HITLIS sooner! I've loved the yz250 for as far back as I can remember and I've tried about every modification/upgrade available for these machines. This system knocks the rough edges off of the antiquated power delivery of the yz250. It remains the absolute animal the yz is known to be but more predictable, more versatile and overall more rideable in tighter trails. Trust me your bike needs the HITLIS! Also worth noting my order showed up with a hand written note thanking me for my purchase along with Tim's number offering answers for any question I may have about the system or install support. Tim offered suggestions on my build for the best results as well as tailored jetting for my build that was spot on from the first kick start! My bike is dialed and I couldn't be happier!

J’ai monté le kit désert taré à 0.8 sur une Fantic xx 250 accouplée à une ligne d’échappement DOMA racing , le résultat répond à mes attentes . Moto facile, puissance linéaire. Merci pour la conception de ce kit et les conseils. Au top ! Salutations de Suisse

A couple weeks ago from writing this i got my first yz250. The bike was tuned for motocross racing so it was VERY aggressive. But my friends told me about hitlis so I decided to give it a shot and oh boy was that the best decision I ever made.

My bike now has way more low end torque and the power band is a smooth transition instead of the instant nothing to everything. Now I can ride trails with the boys with way more confidence!

Thanks Tim for an amazing product and the best customer service I've every had.

Highly recommended

This kit makes the yz a smooth and powerful bike you will love, and Tim is such a great guy. If you want to make a yz something you will enjoy to ride start here!