6) ANY running of the thinner walled cylinders (2008-2012) can lead to stress and fatigue on the cylinder skirts. Dec 11, 2008 596 50 28 Livingston MT . Doug Gardner. Closed up to Jan 11. The longer the rod, the higher the ratio, given the same stroke. RK TEK has a new piston and Cylinder head kit that is designed to help your 800 CFi in 2 ways 1) Improve power 2) Improve reliability of the engine. The REAL issue is that the OEM piston does not REMAIN in spec after use. Two actually as i have the head and test pistons on my both 2017 and 2011 bikes. Re: RK TEK head and new concept piston 2017 300 xcw test. If you are ordering cheater heads, we will need to have your OEM heads to make the modifications. Arrived at my house on Tuesday morning. September 17, 2019. Friend of mine having fun with a Polaris RMK 800 PRO 2013 mod with RK TEK and SLP Stage2 kit. 1) The 2008-2012 Pro 800 CFI Engines use a crank manufactured by MAPE. RK Tek 2 Stroke Performance. This thicker skirted cylinder WILL install into your 2011-2012 cases ONLY if you modify the upper case half to accept the thicker skirt. 4 personnes étaient ici. Doing a compression check will not yield any relevant information regarding the health of your PISTON SKIRTS. its got 1900 miles on it with around 100 psi of compression so we are going to replace the pistons. Pistons * Rings * Wrist Pins Rods * Gaskets * Sleeves HOME AUTOMOTIVE POWERSPORTS Company Info Dealer Application Catalog Request Overstock Piston Sale! I'm not sure as I'm a newbie. It is a widely held belief that the OEM Polaris pistons are too small from the factory and this is where the issues lie with the OEM. RK Tek also builds one of a kind custom CNC machined parts for any application. Some will also have you believe that they have installed a "special" pin offset. Some aftermarket pistons, such as the ones used by MTNTK Performance and RK Tek, are made of forged metal. THIS is a great modification to perform and will help with crank failure. We NEVER use "call waiting" to  "click" over to another call. Our CUSTOM pistons (Direct replacement, Drop In, AND Big Bore) are CUSTOM designed! This stress is amplified by a looser piston and the potential for full cylinder skirt failure increases when a piston is out of tolerance . Both of these kits offer SIGNIFICANT performance enhancement and extend engine life! Wiseco is a USA manufacturer for performance products such as forged pistons, clutch baskets, gasket kits, connecting rods, valves, crankshafts, and camshafts for motorcycles, dirtbikes, ATV, snowmobiles, PWC and automobiles. The Ski Doo 800HO and 800R engines have a 132mm rod and 75.7mm stroke yielding a rod-ratio of 1.74. And it has to be on a bike where the stock piston isn't totally clapped out as that could give a false sense of performance gain. They have very a proprietary design that is unique to ALL of our pistons. Page 1 of 3 - RK TEK head.....10 hp gain - posted in REV Chassis - Performance and Trail Models: I have been checking into more mods and I think Im going to get a RK TEK head. There are some massive gains to be had by drastically altering the piston design. We, usually, end up altering MANY of the OEM piston's design aspects and "correct" the short-comings we feel are present. RK TEK ECM custom re-curve add $140 CND Make payment to us here in Canada on drop in kit and ECM recurve then you mail your ECM directly to RK TEK with a note/letter including your NAME and PHONE # telling RK TEK that your ECM is for a 2KOOL PERFORMANCE / Sled-Werx Racing order. admincheat giveweaponset 0 100 admincheat giveweaponset 1 100 admincheat giveweaponset 2 … Link to his channel: http://www.youtube.com/user/vipe84 Ski-Doo: ZX Sleds. Max Trains et Hobby. NOTE: We return every phone call if a clear message is left. Came off a 06 skidoo 800 rev. 7) Another held belief is that the new AXYS piston has addressed the OEM short-comings mentioned above. Used in there Billet cylinder head. PLEASE, be patient if you get the voicemail and leave a message. I picked up a set of these on Friday. The new engine was torn completely down and inspected for deficiencies. This allows for a lot of rocking in the bore (not good). Sold as a set of 2. ALL of the 2008-2012 800 Engines were prone to lower cylinder skirt cracking! RK Tek spent a better part of the 2008 Season developing a performance package for the new Rotax 800R(ETEC is the SAME ENGINE) Engine. Kelsey Tek Kelsey Manning. In other words,  IF your cylinder is fatigued, it will STILL be fatigued once a better piston is installed. The Rod-Ratio is the ratio of the rod length to the stroke of the engine. Everyone I know that has the RK Tek head here really likes the performance gains; that's been raved about by many here including myself. When you hear that all these aftermarket kits have a tighter tolerance than the OEM.. it is simply NOT true! It has EXCESSIVE skirt taper.. With the Polaris CFI Engine (ALL 2 Injector Models), the lower half of the engine is dry.. meaning there is little to no fuel entering there. Based on these FACTS, I think it is safe to assume that the rod-ratio is not an issue and claiming that is nothing more than a scare tactic. Please visit our website at www.2strokeheads.com Lastly is our MCB Drop-In kit: This kit was designed for those who prefer to simply upgrade the piston quality and leave the OEM geometry as-is. The Arctic Cat 800 has the approx 130mm Rod and the same stroke. FEED SYSTEMS MANUFACTURER AND SUPPLIER All products manufactured to PED and ASME standards FEED SYSTEMS MANUFACTURER AND SUPPLIER All products manufactured to PED and ASME standards Applications SR-TEK containers setup Applications Why SR-TEK What our brand stands for Why SR-TEK References Some of our projects References PRESSURE TANKS Stainless steel swing … This allows your 2011-2012 engines to run with the better 2013 cylinder. _____________________________________________________. RK TEK says they run the Boondocker control box but my mechanic is convinced the Power Commander V and Auto tuner is the way to go. We feel this piston to be mildly superior to the previous piston but also feel it is a lesser quality piston than what we offer. These pistons have about 1500 miles on them. The truth is that the OEM piston's tolerances are in spec, they just don't stay there. People always state "I pulled my OEM pistons and they LOOKED fine and compression reading was still in spec!". Ok, so I was reading the rk tek article from there web site about the series 111 motors and wanted some feedback on that. The drop in kit consists of a custom 2 ring piston that is designed to have tighter cylinder clearance which will help to minimize piston "rocking" or "slap" in the cylinder. Heat is one of the primary causes of skirt collapse and skirt collapse is ONE of the primary issues with the OEM design.. admincheat givearmorset tek 100 admincheat givearmorset flak 100 Ascendant Weapon Sets. This FUJI crank WILL install without any modification into any 2008-2017 engine case. RK Tek is located in Preston, Idaho and is owned and operated by Kelsey and Rex (hence RK). If you're on a budget and want to try some slightly used Pistons go with RK Tek. Performance Motorsports Canada 948 Keyes Drive, P.0. The Polaris rod is approx 132mm in length and the stroke is 70mm yielding a rod-ratio of approx 1.88. These pistons, we offer, are FAR from ANY "off the shelf" OR "aftermarket" piston available today! 2) The 2008-2009 CFI-4 engines had a VERY thin lower cylinder skirt that was prone to cracking especially once the OEM piston gets lose in the bore. Fantastic service, and a pleasure to talk with Kelsey on the phone to place my order. But is useable. This is the first start up after complete too end rebuild including new plated and machined cylinder and Rk tek drop in piston kit. These are very clever marketing terms to impose the "idea" that by installing these kits that the engine is "fixed" and will no longer be prone to failure. This Price Already Includes a Refundable Core Deposit of $100. When you are talking to us, you have our full attention and will not be cut short. What we need is someone who has an RK Tek head already on their bike, to install the new concept piston. RK Tek SKI-DOO 800R/ETEC Drop In Piston Kit ETEC Kit is ONLY $570 PTEK Kit is $845. Thread starter Danzick; Start date Dec 15, 2010; Forums. If you are ordering cheater heads, we will need to have your OEM heads to make the modifications. Polaris thickened up the skirt, again, for 2011-12 CFI-2 Engines. Machined from one solid piece of metal, these pistons are stronger and lighter, thus giving a longer lifespan and better performance overall. These pistons, we offer, are FAR from ANY "off the shelf" OR "aftermarket" piston available today! However, the piston design is not much better than the 800 Piston. Ski-Doo - RK Tek 827 High Elevation Domes. 5) It is also believed that there exists a Rod-Ratio issue with the Polaris 800CFI engines. This is not a bad change but does very little to aid with the skirt collapse, extreme piston weight, and heavy ring drag. If you have any questionscall us anytime we're here to help. THESE pistons address many issues associated with the OEM design (Balance, weight, ring location to name a few).. "FIX KITS" Or other "Clever" marketed named Kits. 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 have spent the time and developed a Piston Kit and a Drop In Piston/Head kit for the 600 Twin.. ALL my pistons are designed from a blank sheet of paper and made with custom components (No, they are not 100% Wossner). This is a great modification and can be done by any competent machine shop. FUEL (NOT COOLANT) is the #1 cooling agent for ANY Engine (important to remember) and this engine has none! Clever named kits do not address the MAPE Crank Issues! They are also lighter than the OEM Piston and that will help with the acceleration from a stop. Kawasaki Ninja ZX-14R. RK Tek is located in Preston, Idaho and is owned and operated by Kelsey and Rex (hence RK). 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