Have no worries.. HELP is finally here for the
800 Polaris CFI Engine!
No "gimmicks" that claim to address the issues
but really do nothing.
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%!
"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.
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
We, REALLY, do address some of the OEM piston design issues with
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 11 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.
outperform ANY other "Bolt On" product you can ,currently, buy for this engine!
NO FUEL Controller required!!
(on 2008-2012 800 CFI Engines)
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
If you are looking to take it to the next
level...Look for the
858 Big Bore Kit
$799.00 and will include the
2ea) RK Tek Custom, Snowmobile Specific
Pistons and Rings
1ea) RK Tek
Custom Billet Head with our
our Industry 1st OEM Cheater Head
Call anytime to hear more about this great