HITLIS YZ250
HITLIS YZ250
By Productive Power LLC
The HITLIS™ Power Valve Control Kits replace and enhance the power valve controls and governor configuration for all current generation Yamaha YZ250 and YZ250X motorcycles. With their patented design, the HITLIS™ Kits create the most effective power delivery possible for all riders.
See below for further breakdown of HITLIS Woods vs HITLIS Desert
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What's in the Box
What's in the Box
- A. Closing Fork (x1)
- B. Left Pulley (x1)
- C. Right Pulley (x1)
- D. Left Torsion (x1)
- E. Right Torsion (x1)
- F. Governor Spring (x1)
- G. 1.1mm Thrust Washers (x3)
- H. .8mm Thrust Washers (x3)
- I. .3mm Shim Washers (x3)
- J. .2mm Shim Washers (x3)
- K. Linkage Lockup Tool (x1)
- M. Valve Shaft Screws (x3)
- N. 3mm Hex Key (x1)
- O. Brake Pivot Lock Nut (optional) (x1)
- P. Cover Screws (optional) (x4)
- Q. Stickers (x2)
- R. Plano Container (x1)
- S. Instructions (x1)
Shipping
Shipping
Domestic
Free shipping to all 50 states. Delivery usually occurs in 2-5 business days after shipping.
International
All international orders have a $30 flat shipping rate. This does NOT include taxes and duties. Taxes and duties are to be paid by the customer upon pickup, Productive Power LLC does not pay international taxes and duties. Items are shipped via USPS Priority Mail International. Delivery usually occurs 1-2 weeks from shipment.
See Shipping Policy (link found at bottom of page) for full detail of Shipping Policy.
Returns
Returns
Domestic
We offer free returns within 60 days of purchase, if in new uninstalled condition.
International
No international returns are offered at this time, unless due to manufacturing defect discovered prior to installation.
See Return Policy (link found at bottom of page) for full detail of Return Policy.
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HITLIS Woods: Optimal Precision for Lower Ground Speeds
Experience the unparalleled performance of our HITLIS Woods Kit, expertly designed to cater to lower ground speeds. Its carefully calibrated valve sequencing takes into account the heightened demand for engine control in lower gears. The result: The most linear power output ever made.
If your riding terrain involves tight, technical, single track trails, or if you're a Vet motocross rider seeking the ultimate upgrade, the Woods Kit is crafted just for you. Embrace the unrivaled precision and performance it brings to those who frequently use 2nd-gear to take on their challenging off-road conditions.
Beyond its remarkable control on the trails, the Woods Kit offers similar potent power and the same governor adjustability as the HITLIS Desert Kit. This means that even if your adventures take you to wide open places, you can trust the Woods Kit to deliver a thrilling experience, seamlessly adapting to varied terrains.
Make the ultimate upgrade to your bike's potential with the HITLIS Woods Kit and revolutionize your off-road experience. Embrace the newfound control, power, and adaptability, and conquer any terrain with the utmost confidence. -
HITLIS Desert: Superior Control for Higher Ground Speeds
Experience the unparalleled performance of our HITLIS Desert Kit, expertly crafted to cater to higher ground speeds. Its carefully calibrated valve sequencing takes into account the increased load requirements on your engine while in higher gears. The result: A strong and potent power output, delivered in a smooth and linear fashion.
If your riding environment is more 4th-gear oriented, on fast, open, flowing trails, the Desert kit was designed for you. Unleash explosive yet controlled power and performance as you maneuver through expansive open terrains. Calling all Pro motocross riders - the Desert Kit is tailored for you. Unleash your true potential and dominate the track with the commanding power and precision that only the HITLIS Desert Kit can offer.
In addition to its exceptional performance in high-speed environments, the Desert Kit offers a similarly smooth-controlled power output and governor adjustability as the HITLIS Woods Kit. So, even if you find yourself amidst tight, technical trails, rest assured that the Desert Kit will adapt effortlessly, providing you with a versatile and exceptional riding experience.
Revolutionize your off-road journey with the HITLIS Desert kit, and enjoy power and performance like never before.
The Hitlis Story
Since its initial release in 1974, I, along with countless others, believe the Yamaha YZ250 (and YZ250X) to be the best off-road motorcycle ever made. However, there is one often-cited issue with the current generation’s engine that has persisted since its introduction in 1999: it does not provide a linear power output. Additionally, no aftermarket parts have been able to offer the combination of full power and smooth control that everyone desires.
Among the many thousands of hours I have spent riding, working on, and trying to perfect these bikes, I found myself making a cutaway engine. This revealed the reason for the non-linear power delivery: spring resistance inside the PV box. While this spring resistance was necessary to activate the secondary power valves, it was unintentionally disrupting the linear nature of the governor. So, I set out to fix it.
With God’s help, I was able to envision a new system that linked the power valves to the governor while simultaneously eliminating this spring resistance. This new patented system gives the governor complete control of the power valves, and thus complete control of the power output. From there, my focus turned to the governor, and a new governor spring was created to leverage Yamaha's superior cylinder and power valve design. Additionally, adjustability was incorporated into this new governor spring, allowing each rider to fine-tune it to their liking; you can mellow it out as much as you want, or speed it up as much as you can handle. These improvements then highlighted the need to change the valve sequencing in order to make the perfect release of linear power. After trying hundreds of sequence combinations, we were able to accomplish just that.
What’s it like to ride? Simply put, it’s incredible. The bike’s acceleration and deceleration are as smooth as glass. Your newfound control of the power output makes you feel like a surgeon with a scalpel. Everything seems to work better; the traction is better, the suspension works better, the braking is more effective. You end up being smoother, which is safer, while at the same time faster and less fatigued.
All of the components of the HITLIS kit are patented and made in the U.S.A., using the highest quality methods and materials. Step-by-step installation videos on our website make installing the kit easy for riders of all mechanical abilities. Whether you’re plunking around with the kids, in competition, or both, the HITLIS kit will elevate your riding experience. It is the first thing that should be done to these bikes.
- Tim King, Founder, Productive Power LLC