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.







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
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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.
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.
Is the kit compatible with my bike?
HITLIS kits are designed specifically for Yamaha YZ250 and YZ250X models.
I’m a more seasoned rider 70 and have just been off for 6 months with a shoulder injury, yes another bike mishap. I usually ride at least one a week, doing doing singles and 4wd trails in Victoria, Australia.
I have a 2022 YZ250X and also a tm300i en, both great bikes. Usually ride 120 to 150 hours a year.
Now to my return ride last weekend, yes when I got on it it felt different, not too much on the transport sections, but that was probably due to me being cautious being my first ride back, then we quickly headed off into the singles and as my confidence returned it showed me a little of what the HITLIS can do.
* reduced vibration through the bars
* more lugging power which reduced the need to change down even on tight or steeper sections
* ability to ride the singles a gear higher, making it smoother and faster
* reduced wheel spin when accelerating
* significantly increased traction in areas that would previously be difficult due to loss of traction
* no reduction in power, just delivers it in a useable way
These are what I noticed on my first ride with HITLIS, can’t wait to see how I feel after half a dozen rides as my friend is on about his 6th ride with HITLIS and is more impressed after every ride, he also has a lot of experience and other bikes to compare it with (YZ300X, YZ450FX, YX125X) all current models.
It’s a Public holiday here next Friday so we are heading out Friday and Saturday this weekend.
Pic, out riding with my son and grandson.
Thanks Tim and your crew for the work to develop this and the exceptional customer service.
Rob
First, Tim is outstanding. I would give 6 stars if I could. He talked me through some questions late at night while I was installing it in my garage. He was patient and extremely helpful, and made sure everything was perfect. After some light testing to get used to it, I did 40 miles of desert single track, about half of it on the race course USRA uses for the Nutty Putty Enduro each year. The trail was rocky and nasty, with lots of steep ups and downs, and I had just ridden the same ride on the stock 250x a week before.
Hitlis was incredible. Power whenever I needed it. It had the sensitivity and control I used to have on my Beta in the slow grunty sections, but with the ability to fly and pull like a YZ when I twisted the throttle. There were multiple sections that I had never hit cleanly before (on my Beta or the stock 250x) that I was now able to do without putting a foot down. I know they say you can't buy talent, but I feel like I did. Truly incredible.
After I started trusting it more, I found myself riding in 3rd gear and using the clutch instead of just trying to "rev & pray" through the tech in 2nd, which used to be the only option. My YZ250x is really a do-it-all weapon now.
I was most amazed at how smooth it makes the bike. I was less tired after 40 miles than my last ride of 20 on the stock 250x PV setup. These bikes should come stock from the factory with this.
Great Product- works as advertised for taming the hit of my 2014 YZ250. Very analogous to a flywheel effect- in that it just knocks the 2 stroke hit/spool up down to manageable ( adjustable) levels yet doesnt reduce overall torque or horsepower. Coming off a series of the Orange bikes- 350/450's- it works very much like a modern map adjustment. But its "set it and forget it". Highly recommended and allows MUCH better throttle control on modern tracks with 4 stroke style- sweeping outside- lines.
Does way it'd meant to do
The hitlis is like unlocking a new mode on your yz250. When you first install it and cruise it around, you feel like you can feel something right away. But it’s not until you get it on the track or trail that you really notice the wow factor!! This thing creates a new bike! And the next couple times you ride it after that, the more you notice the difference. This has now made my yz250 my new favorite bike, it is so much more fun to ride! This will be the FIRST thing I put on my next yz250.