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Chris.. Glad your parts showed.. Sketch... I am glad you agree... The simple truth is that Polaris "Cheaped" on the pistons to save money.. So, the metalurgy is simply not correct and the pistons do not hold their shape.. Couple this with the lack of cylinder lower support and you have the...

If you are seeing anything over 140 then you should do something to lower that temp.. We usually always run at about 126.... I would just pull the T Stat and that should do it.. But I have heard people having some luck with the Ski doo t stat set up.. We use all stock and have no issues.. We...

Very nice... Love the wrap.. Adding those KOOL RK Tek Stickers would look good also!!;)

Great question Turbos have more raw unburnt fuel in the crankcase fuel cools.. Also case pressures are higher in a turbo... also turbos are never run WOT constantly, like N/A engine.. Turbos put more stress on the crank train but CAN run provide more "cushion" due to the excess fuel that is...

Cast Vs.. Forged.. Simply a different method of "forming" a part.. Forgings are stronger and usually lighter but are more expensive to produce.. this is the main reason why cast is used on most production vehicles... HOWEVER; there are more and more production autos beginning to use a forged...

Great question Here is what we have seen over the years with this engine (dating clear back to the 2008 IQ Chassis) The pistons, when new, are properly sized... the problem is (and worse since 2011 when they change piston manufactuers) is that the piston does not hold it shape or tolerances...

I thought it may be helpful to post a little info on this engine and the large amount of "information" that surrounds this engine. I think S&M may have the more level headed members and HOPE that this thread can stay civil.. PLEASE take it as ONLY MY opinion (even though there are many other...

The stock pistons will simply not hold up to the the 300 HP that the engine was making.. Yes, they tried them.. The head design was CRITICAL in acheiving the 300 HP... I know this because I worked with them on this and also because they told me that the RK Tek components were vital to the...

These pistons and custom heads set WORLD RECORDS!!! Check it out... You are right.. LOTS of BS out there and LOTS of claims. BUT WORLD RECORDS really do speak for themselves... World record speed for snowmobile on water! 2013 - YouTube

Jaws recommends specifically to NOT alter the airbox with their pipe.. We have done many alterations with the stock air box and all of them lost power (same with what Jaws found) We found the very same with the M series air boxes... everytime you would mod them.. they would lose power... Air...

Yes, good porting will add some power as well.. Poor porting will remove power. The Drop In Kit , we offer, alters port timing via the piston, so, with the Drop In Kit, you do get a better piston and a porting change.. that is why it works so well and adds the power that it does..

Guys.. just to clear things ups... ALL RK Teks products have a warranty.. The warranty covers ANY item that is not in spec or has issues. Keep in mind, when you get an Indy specialty engine, you are NOT getting a warranty against piston failure... you are getting a warranty against the crank...

Really not sure where these prices stemmed from... but just to clear up the misconception... The RK Tek kit is $375 plus $48 to ship.. no taxes..

With all due respect, the PMS kit and the 858 kit are very different.. same comparing the PMS kit with our Drop In kit.. they could not be more different.. The 858 kit is an OVER-BORE.. Meaning, the cylinders have been bored, ported, and replated..It also comes with our Patented combustion...

Again.. That is what we have produced

Yes, that is what we have.. butnot round on the outer due to weight .. The inner portion is what is critical.... As for balance.. not an issue since the shaft has way too manyother things attached to it (track, drivers, snow built up, belt etc) that allows for imbalance.. Our little part weighs...

I guess the pics are not that good.. But what you have wished for is exactly what we have produced... Since I know what it looks like I guess it is difficult for me to be objective as to what the pic actually shows... But, rest assured, the part is a custom fit piece that hugs the shaft and...

Ahh, that is exactly what it is.. I am confused on what you think this part, wemake, looks like.??.

This is not a permanent fix for this issue.. The design of this shaft is flawed .. What I am offering is a re-enforcement that WILL strengthen the critical areas.. This is an interim measure to ,help, get people on the snow and riding while Polaris get the recall going.. The recall could take...

Rivets introduce the possibility of fracture. AND, many people are not comfortable drilling and riveting a shaft..Not to mention, if Polaris does this ona warranty basis vs a recall.. the riveted ones will not be covered. If the shaft can not "tear" then the end cap can not seperate from the...