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August 2025 by Advantage Star Mortgage
Purchased the head insert for my 2022 Husqvarna TC125 and WOW what a transformation!!! Who thought a 125 could have so much low end and easier to hit the powering. Much more linear. No loss of top end over revs. A must have. Best performance upgrade for your money!! RK Tek definitely know what they are doing
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April 2024 by Chris George
I ordered a head for my 2023 Sherco 300 SE Factory. Arrived very quickly. I run a smart carb, and after installing this and hitting the trail, what a difference, when you read RK Tek's description on there website of what you'll notice using there head, that is exactly it to a "T". Broad linear power all the way through, lots of torque, and very smooth acceleration. I would recommend to anyone looking into a aftermarket high compression head. Easy installation as well. Thanks RK tek.
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November 2023 by Brad Bitely
Purchased the claimed Polaris 800HO fix it kit. Thinking I was getting a set of Wossner pistons, I was disappointed to find that the new piston kit is made by Weisco. Installed it anyway, hoping for the best. Did the proper break in by doing several heat cycles before riding it. I NEVER just jump on and ride. I let the motor warm up at least a minimum of 15 minutes before riding. With a little over 500 miles on the motor, it cold seized and locked up on me. Absolutely would not recommend this kit. If you need to rebuild, I would definitely spend the money on OEM and not smoke and mirrors.
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June 2023 by Cam K
Awesome product and I really appreciate the help he gave me on fixing my bike.
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April 2023 by Rod Courtenay
Game changing cylinder head inserts. I have purchased 2 KTM 150 inserts. 2 YZ 250X insert and a Beta 200 Race insert and they do everything that Kelsey said they would do. A must have smooth usable performance upgrade that is first on my list. Pay attention to Kelsey’s fuel recommendations if available. Look no further than the stock carburetor as jet less ones bring carb icing issues and run too lean! sacrificing longevity, torque and horse power.
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September 2022 by J Shepherd
Great guys to work with. Listen to his advice and he will get the most out of your bike. Purchased two heads for my KTM 150 xcw and KTM250 xc. Jason from Canada
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June 2022 by Ben Hanson (KTMBEN)
Fantastic product and customer service. Thank you RK Tek for making my riding time more enjoyable.
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May 2022 by Mitch Barker
Bought a billet head for my 2020 husqvarna te250i. I cannot believe how much it changed this bike! The power difference is amazing! Runs cooler and so much more power all throughout the rpm range. 10/10 already recommended to all my friends :)
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March 2021 by Christopher Turner
Ordered the factory head reshape for my 2015 KTM 250XCW and from the time they received it, I had it back in my hands in about a week. The increase in low and mid-range power is impressive, even more so when compared to the cost. Would highly recommend.
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January 2021 by Joshua Minix
Fantastic quality heads, and very well-tailored to my specific preferences. I had one custom cut for my altitude, preferences in performance, and fuel type. RK absolutely nailed it. The performance is exceptional and to my surprise fuel consumption is substantially reduced, allowing me to complete most rides with the stock tank where previously I'd have needed to use my larger tank (2019 TX300). I've been riding/racing two strokes for 30years and am quite picky. This was spot-on right out of the box.
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June 2020 by Christopher Field
Great product
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January 2020 by Pappy Boyington
The head simply did not work on my bike and he would not honer his money back guaranty, caused me a lot of problems and he would not take any responsibility at all. He would not allow me to return it.
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January 2019 by Rob Wigdorski
Great guy to work with, easy to talk to, fantastic product. I've purchased heads for my last two bikes from them. Worth every penny.
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June 2018 by Derik Violette
Just installed my new Rk head on a 2017 beta 300. Insane difference. It pulls hard from start to top end. Very very impressed! Thanks alot!
