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HITLIS YZ250

HITLIS YZ250

By Productive Power LLC

Regular price €324,95 EUR
Regular price Sale price €324,95 EUR
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Shipping calculated at checkout.

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

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

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

Domestic
We offer free returns within 60 days of purchase, if in new uninstalled condition.

International
No international returns are offered at this time.

See Return Policy (link found at bottom of page) for full detail of Return Policy.

View full details

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

  • 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.

Frequently Asked Questions

What does the HITLIS kit do for my YZ250 and YZ250X?

The HITLIS kit improves throttle response and power valve control, offering smoother and more precise power delivery for technical and high-speed terrain.

Which kit should I choose?

The Woods Kit is ideal for slow, technical riding, while the Desert Kit excels in high-speed environments.

Is the HITLIS kit easy to install?

Yes, we provide an installation guide and video to simplify the process.

You can watch our playlist by clicking here.

Is the kit compatible with my bike?

HITLIS kits are designed specifically for Yamaha YZ250 and YZ250X models.

Customer Reviews

Based on 118 reviews
97%
(114)
3%
(3)
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(1)
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J
Joseph
Smooths out the hit of getting on the pipe without sacrificing anything

I have a completely stock 2020 yz250x and this was the first performance mod I did to it. The change is night and day. I won’t bother explaining it, as everyone else already does a good job of that!

Tim was/is a huge help in make sure everything went smoothly on the install as well as helped with any random yz questions I had (I have a lot, as this was my first 2 stroke ever).He also gave me some great advice for tuning the carb even further to get the most out of the new Hitlis system. Needless to say, the product is a 10/10 and Tim’s excellent help and customer service made it an 11/10. Quality all around experience and product. You truly get what you pay for in this.

G
Gary Johnson
My 2025 YZ250X Is Now the Bike I Thought I Was Buying

I came from riding big four-stroke bikes like the DR650. When I first got my YZ250X, it was harder to ride than I expected. I thought I just needed more practice, but then I kept hearing about this HITLIS mod. After thinking about it for a while, I decided to try it.

The install was easy. Tim, the guy who made it, even helped me over the phone while I was putting it on. I now have about five hours riding with the HITLIS, and my bike feels completely different. It’s exactly how I thought the YZ250X would feel when I bought it—smooth, fast, and fun. The power is easier to control, and I don’t get as tired as before.

I did wonder if I should have just learned to ride the stock bike, but after trying this, I don’t think I’ll ever go back. Now I can focus on becoming a better rider instead of fighting the bike. Next, I’ll be working on the jetting with Tim’s help, and I plan to add a YZ250 head and GYTR flywheel weight. After that, I don’t think I’ll change anything else. I’m just excited to enjoy this bike for years to come.

This mod was definitely worth it to me.

Q
Quentin Oliver
First two rides

This product is honestly a game changer if you want to ride the YZ platform for challenging, technical riding.

I'm on a 24 YZ250x with a 24 YZ250 cylinder and ignition with a bunch of bolt on goodies.

In every situation I am now riding a gear higher and am considerably quicker in the hard stuff since installing HITLIS.

Bike pulls so hard straight off the bottom but always controllable. I spent a fair bit of time in 1st gear before but now in 2nd and sometimes 2 gears higher.

Deadset the best mod you could do for your YZ.

Awesome work Tim.

Quentin ( In Australia)

R
Rodrigo
Muy buen producto, lo recomiendo.

Creo que hitlis debería venir instalado de fábrica, mejora significativamente el comportamiento de la motocicleta. Luego de la instalación, mi yz250x se siente con mayor poder, más torque y mucho más ágil y amigable de pilotear. Se puede conducir de forma más agresiva y fluida que antes, teniendo un margen de error mucho mayor. Desde el despacho hasta tener el producto en mis manos, transcurrió aproximadamente 1 mes. Cabe destacar que el servicio de venta y post venta es increíblemente bueno.

S
Stephan G
Totally worth it

Don't sit on the fence anymore, just do it. I was worried it would turn my bike into a marshmallow but it still breathes fire when I wrap the throttle on. But when you want it to be tame and linear it just lugs like a champion. Best mod I've done. 06 yz250 Woods kit.