POLARIS 800 CFI 15HP "Drop In" Piston/Head Kit

Have no worries.. HELP is finally here for the 800 Polaris CFI Engine!

This kit has been running for OVER 3 seasons  logging 1000's of miles each season and the results are outstanding! 1000's of them out on the snow and performing! Cylinder and piston cracking has been eliminated with this kit!

After MANY tear-down and inspections, this kit has PROVEN to be solid and, more importantly, to fix the issues that are associated with running the OEM piston.

 Serious HP (15HP) is realized and the reliability IMPROVED for a very small cost!

No "gimmicks" that claim to address the issues but really do nothing.

You can NOT get this kind of power AND address an internal engine problem anywhere else for this low of price!

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 REAL "HELP" will come in the form of 2 Custom Pistons and a Custom Head that will completely transform your engine into what it should have been from the Factory!

With our custom piston geometry, the porting is altered resulting in huge HP and Torque gains!

Piston side loading is reduced due to our unique piston's weight. Yes, this piston is much lighter than the OEM piston and having a lighter piston will reduce piston side load pressures AND reduce the stress on the crank!

Also find that annoying vibration is gone with these pistons.. You know how the PRO likes to "shake" at low idle? Check out what one customer (who is actually a Polaris Mechanic/Service Manager) had to say after an install

We find that the OEM Polaris Piston will NOT hold its form after a very short time of running. We have found it common to see the piston to cylinder wall clearance DOUBLE in less than 1000 miles.. THIS is the #1 reason behind these cylinder failures associated with the Polaris Engine!! IT IS NOT due to a rod ratio error! It is SOLELY related to excessive piston to cylinder wall clearance! 

The RK Tek Pistons address this issue 100%!

 

NOTE: This is VERY important...These pistons have a VERY unique design criteria. You do NOT have to treat these pistons any different (in any way, shape or form) than your stock piston! They require ZERO added "treatment"! They will NOT fail unless they are subjected to a low fuel or high heat condition! These pistons are the BEST piston available on the market today! BAR  NONE!

 

 

"Hey Kelsey. Put my drop in kit in today, nice stuff. On this sled also all the annoying vibrations and 3000rpm death-shake are gone. Smooth. The stock pistons were 3 grams different in weight. The RK Tek Pistons were a full 27 grams lighter and exactly the same weight to the gram. The old setup when idling the coolant temp would gradually climb of course and continue to climb without hesitation. Your head cools so efficiently that i never could get the temp over 133F it would just sit there. Even when brought up to 4500-5500 rpm the temp would slowly climb to 140F. What an amazing difference. Can't wait for good snow now. Turned the oil pump up one full turn and running 91 octane on the non eth resistor. 1/2 litre of semi synth oil in full tank fresh fuel. Anything else you think i should know bud shoot me a pm when you get a chance, i know your flat out. Have a good one man.
Thank you,"

 

 

AND another statement from a different Polaris Dealer Service Manager

have roughly 50 miles on my 2013 155 pro with kelsey's drop in kit with the higher compression head. I have "stacked" his set up with an slp pipe can power commander and my own clutching (not slp's set up). It is a noticeable difference. as far as track speed i do not know yet as we only have about 2 feet of snow right now. what i do know for fact is that with this set up running the slp stage 4 map which is def. on the rich side i was able to quite easilly beat a 2012 stage 4 slp pro 800 in a short drag race. not only that i am pulling 2 grams heavier weights than the same set up with out the drop in kit. and i'm pretty sure i'm going to have to add even more weight. the power band feels much SMOOTHER and it even gives the motor a lot crisper sound. I am sold on these kits so far after a little bit of experience around kelsey's product last year and this year. Lets just say that mine ran good enough not even broke in that i have already sold 7 more of kelseys drop in kits. Eric Woog (owner of VOHK) is also running these kits and he def. knows what he is doing when it comes to making power on sleds.

 

Piston design is altered for OEM in order to address, what we feel, are problem areas with the OEM piston

 Less Stress = More longevity and more power!

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

No more "SLOPPY" OEM piston with poor piston geometry--> which can cause cylinder skirt cracking.

BEST PART: NO AFTERMARKET PIPE is needed! We, purposely, designed this kit to perform using the stock exhaust components!

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

 

We have been doing these "Drop In" Kits for over 12 years on the Ski Doo  and now we are applying our expertise to the "lacking"  800 CFI Power-Plant.

 

There is NO DOUBT that this mod is the best mod for the money you can do.

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

It WILL outperform ANY other "Bolt On" product you can ,currently, buy for this engine!

 

NO FUEL Controller required!! (on 2011-2012 800 CFI Engines, Fuel controller required on the 2013-Newer )

Kit works EXCELLENT on the CFI-4 engines but they will require a fuel controller

 

 

In fact, we designed this kit to run on the oxygenated fuel (Ethanol) and still use the NON-ETHANOL factory resistor!! So, it extremely safe on bad gas! How great is that?

 

It does not get any better than this for the $$ spent!

 

If you are looking to take it to the next level...Look for the 30+HP 858 Big Bore Kit

Cost for this 15HP Drop in Kit (See Below)

 

Cost is $845.00 and will include the following:

2ea) RK Tek Custom, Snowmobile Specific Pistons and Rings

1ea) RK Tek Custom Billet Head with our PATENTED Combustion Chamber design OR our Industry 1st OEM Cheater Head ($100 LESS)

1ea) Base gasket

 

Call anytime to hear more about this great upgrade

 

 

 

 

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