A Little History....
RK Tek was the 1st company to recognize the short-comings of the OEM BRP pistons. In 2000, the Ski Doo 700 Twin was introduced with its single ring piston design and it Moly impregnated cast piston rings. We, quickly, discovered that the rings were flaking on any pro-longed pull lasting over 45 seconds. Upon further inspection, we determined that the rings were being overloaded with heat and this would cause the ring faces to "chip" or "flake" and performance would suffer because of this.
After countless efforts to remedy this situation (including, Cryro-Genic treatments, different ring materials. etc..) we came to the realization that the single ring was simply inadequate to transfer the heat from the piston to the cooling system. At this point, we decided to find a better suited piston that was equipped with 2 rings vs. 1.
This kit is our now, infamous, "DROP IN" piston and head kit (over 5,000 sold) where , not only, did we fit the engine with 2 ring pistons, we also gave the engine a VERY nice porting change via the piston geometry. So, the engine would now be fitted with a much better piston and also have a better port timing design than stock. HORSE-POWER was WAY up! This kit has proven the test of time (over 10 years and running) and has put smiles on 1,000's of people faces!! We could not be happier.
It took Ski Doo until 2004 to fully realize the issues that plagued their engines (remember RK Tek discovered this problem in 2000).
Ski doo only realized
half of the issues and decided to keep the single ring design BUT change
the ring design to a better design that would not suffer from "ring
flake". So, now, we had a better ring but the same old single ring
piston. You can read more about the benefits of a dual ring piston and
why BRP might have opted for this design in the
Tek-Nikal Section of this
Since the RK Tek designed pistons are so successful, We decided to expand our piston design line to include many other pistons that are specifically designed for snowmobile engine applications!
Our pistons have a geometric
design that is specifically for the rigorous
use that a snowmobile engine subjects the piston to... We also use a
different alloy that better suits the snowmobile engine..
We have went the extra mile
and developed our own piston using a custom forging, cam grind , and
taper.. basically a snowmobile, high LOAD. design that allows for
sustained , heavy, running without failure...
Another added "BONUS":
The stock Ski Doo 800R piston with pin and ring weighs in at a whopping 567 grams.
The RK Tek Direct Replacement 800R Piston with pin and rings weighs 484 grams.
So, the piston is 83 grams LIGHTER than the stock piston! This will translate into
more power and LESS stress on your crank. The engine will rev quicker and last longer!
See below for more weight comparisions All weights include pins and rings:
800R Stock(2007-2011): 567 grams RKT Direct Replacement: 484 grams
800R Stock(2007-2011): 567 grams RKT Drop In Piston: 471 grams
Stock(2001-2007): 513 grams RKT Drop In Piston:
Here is a list of what RK Tek has to offer to make your snowmobile engine much "happier"
800HO and Non-HO (Series III) Engine: "Drop In" Dual Ring Piston and Head Kit
800R Engine: 800R "Drop In" Dual Ring Piston and Head Kit
800R and 800 ETEC Engine: 800R Direct Replacement Dual Ring Pistons
600HO, 600 SDI, 600RS Engine: Direct Replacement Dual Ring Pistons
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