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Polaris 800 DR Piston-1
Polaris 800DR piston-3
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Polaris 800DR piston-37
Polaris 800 DR piston-5

Polaris Patriot 850 Dual Ring Direct Replacement Pistons

2019-Newer 850 Patriot Engine Dual Ring Replacement Pistons
Snowmobile Make:



NOTE: As of JAN 2023 were are out of stock on these pistons.. We HOPE to be back in stock come March 2023


In TRUE RK TEK Fashion, we could not stand for a Single Ring Piston on a high HP 2 Stroke Snowmobile Engine. 

We did what we always do... Designed a CUSTOM DUAL RING PISTON for this engine. 




Polaris CFI Engine! Yes, these fit the new HO Engine.
No "gimmicks" that claim to address the issues but really do nothing.

Please be aware of "CLAIMS" that the OEM cylinders are over-sized from the factory!! This is simply a sales "gimmick". We have measured 100's of these cylinders and NONE of them have been out of spec!

It would have required a HUGE final bore machining/boring error for this to happen... again, this is a clever gimmick to try and sale you something!

There is NO problem with the sizing of the cylinders. There IS a problem with the pistons .

Please see below to learn more about our solution!


The RK Tek Line of Customs Pistons are VERY Unique... ALL pistons are designed from a blank sheet of paper and uses only the highest quality of components. We design the piston that should have been installed from the factory. We, usually, end up altering MANY of the OEM piston's design aspects and "correct" the short-comings we feel are present.


The piston we use is VERY CUSTOM! We have been designing our own pistons since 2005.

These are the BEST pistons you can buy!!


NOTE: The RK Tek Line of Pistons are VERY different from any other production piston.

NOTE: This is VERY important...These pistons have a VERY unique design criteria. Y!

Less Stress = More longevity and more power!

We, REALLY, do address the OEM piston design issues with this kit.

No more "SLOPPY" OEM piston with poor piston geometry.

BEST PART: NO AFTERMARKET PIPE, Fuel controller, OR anything else is needed! We, purposely, designed this kit to perform using the components!

Once you have the kit installed.. YOU ARE DONE!!

Reliability is NOT compromised in any way, shape, or form and the cost is VERY affordable.

NO FUEL Controller required!!

If you are looking to take it to the next level...Look for the 858 Big Bore Kit OR the DROP IN KIT 


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Don'f Forget to Send in Your OEM Heads !

If you are ordering cheater heads, we will need to have your OEM heads to make the modifications.  If you have any questions
call us anytime we're here to help.