Anyone have any experience with them? This MAPE crank has a high failure rate of the lower rod bearing and the outer bearings. Installing ANY clever named piston kit will NOT fix your thin walled cylinder skirts! These pistons, as all my other CUSTOM pistons, follow this same design procedure, 1245 Industrial Park Rd.Preston, IDAHO 83263PHONE: 208-852-3221Email: torqueline@2strokeheads.com. When you hear that all these aftermarket kits have a tighter tolerance than the OEM.. it is simply NOT true! It suffers from skirt collapse and it is also WAY too HEAVY! In other words.. your piston can LOOK perfect but MEASURE out of spec. Max Trains et Hobby. 6) ANY running of the thinner walled cylinders (2008-2012) can lead to stress and fatigue on the cylinder skirts. They are 100% unique to RK TEK! PLEASE, be patient if you get the voicemail and leave a message. Our CUSTOM pistons (Direct replacement, Drop In, AND Big Bore) are CUSTOM designed! Sorry guys... this is the reality! Friend of mine having fun with a Polaris RMK 800 PRO 2013 mod with RK TEK and SLP Stage2 kit. 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. Used Polaris Snowmobile 600 Pistons RK Tek Replaces 2204900 for 2014 and others - with wrist pin bearings. Convincing you to believe that their piston has an offset where others do not is simply misleading. 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. 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. Skirt collapse happens usually WITHOUT any scoring or visual appearances on the piston. If it uses a 1/4" shim under it, then this is most likely the case. 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. Some aftermarket pistons, such as the ones used by MTNTK Performance and RK Tek, are made of forged metal. However, the piston design is not much better than the 800 Piston. We are the ONLY company that has a kit to aid in lower piston skirt support. The Arctic Cat 800 has the approx 130mm Rod and the same stroke. The phone is busy all day long servicing our clients. We NEVER use "call waiting" to "click" over to another call. We address this with our REV 2 Drop In Kit. Polaris Patriot 850 Dual Ring Direct Replacement Pistons, Polaris Piston Myths vs. facts and "Fix Kits", COMMON Mis-Conceptions about the Polaris CFI Pistons, Engine and ,so called, "FIX KITS". Hopefully, this article will clear up some of the mis-conceptions that surround this engine and its internal design? Closed up to Jan 11. 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. There are some massive gains to be had by drastically altering the piston design. 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 … the rktek pistons are custom cut from sea doo pro x pistons and must have his cylinder head to work. RK Tek Inc is your premier 2 Stroke Performance Shop.. ALL we do is 2 Stroke Engines! Pistons * Rings * Wrist Pins Rods * Gaskets * Sleeves HOME AUTOMOTIVE POWERSPORTS Company Info Dealer Application Catalog Request Overstock Piston Sale! 1) The 2008-2012 Pro 800 CFI Engines use a crank manufactured by MAPE. But is useable. Thread starter Danzick; Start date Dec 15, 2010; Forums. Yes, that's right, RK Tek draws results from "real world" testing. 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. We design the piston that should have been installed from the factory. These changes add up to unquestionably the strongest, most powerful and durable piston the Polaris 800 owner can buy. Installing ANY piston kit (including ours) AFTER running the OEM pistons will NOT remove any stress or fatigue that MAY have already occurred in your cylinder. As you provide your questions below, we'll relay them to Kelsey and staff. Supposedly the PCV with the auto tuner only takes one trip to get it set up and then it is spot on because of the Auto Tuner. If you have any questionscall us anytime we're here to help. Running our piston vs. this piston WILL show some performance enhancements. Performance Motorsports Canada 948 Keyes Drive, P.0. This is 100% false!! This thicker skirted cylinder WILL install into your 2011-2012 cases ONLY if you modify the upper case half to accept the thicker skirt. 1) The 600 Polaris Engine is a great engine!.. 7) Another held belief is that the new AXYS piston has addressed the OEM short-comings mentioned above. He said an honest 10 hp and have nothing but positive feedback on it. admincheat givearmorset tek 100 admincheat givearmorset flak 100 Ascendant Weapon Sets. These pistons, we offer, are FAR from ANY "off the shelf" OR "aftermarket" piston available today! well worth it if your looking for some more performance. 4) There is a common belief that the 2013 and newer engines have a cylinder or crankshaft offset compared to the earlier years. They have very a proprietary design that is unique to ALL of our pistons. The Rod-Ratio is the ratio of the rod length to the stroke of the engine. Condition is "Used". One would hope that any of these other pistons would also contain this same OEM offset. Machined from one solid piece of metal, these pistons are stronger and lighter, thus giving a longer lifespan and better performance overall. When you are talking to us, you have our full attention and will not be cut short. The MAPE crank was discontinued in 2013 and newer engines in favor of a new manufactured crank by FUJI. 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. Yes, that's right, RK Tek draws results from "real world" testing, 1245 Industrial Park Rd.Preston, ID 83263 Phone: 208-852-3221, Copyright © 2017 RK Tek - All Rights ReservedCreated by Mountain West Web Design. People always state "I pulled my OEM pistons and they LOOKED fine and compression reading was still in spec!". 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. I picked up a set of these on Friday. FUEL (NOT COOLANT) is the #1 cooling agent for ANY Engine (important to remember) and this engine has none! Please speak loud and clear when leaving a message. This is a great modification and can be done by any competent machine shop. Ski-Doo: ZX Sleds. The MTNTK fix kit addresses piston failure that is common with some Polaris engines. Visual inspection will tell you NOTHING about the size of your piston. We, usually, end up altering MANY of the OEM piston's design aspects and "correct" the short-comings we feel are present. Ski-Doo. Remember this, VERY IMPORTANT, a compression check will tell you little to nothing about the health of your skirts. RK Tek 2 Stroke Performance. D. Danzick Free Member. The new AXYS piston is basically, the SAME piston with some added oil retention grooves on the exhaust upper skirt. ALL of the 2008-2012 800 Engines were prone to lower cylinder skirt cracking! This FUJI crank WILL install without any modification into any 2008-2017 engine case. Polaris thickened up the skirt, again, for 2011-12 CFI-2 Engines. This allows your 2011-2012 engines to run with the better 2013 cylinder. RK Tek SKI-DOO 800R/ETEC Drop In Piston Kit ETEC Kit is ONLY $570 PTEK Kit is $845. Some will also have you believe that they have installed a "special" pin offset. KTM and Husqvarna. If you are ordering cheater heads, we will need to have your OEM heads to make the modifications. This stress is amplified by a looser piston and the potential for full cylinder skirt failure increases when a piston is out of tolerance . If you're on a budget and want to try some slightly used Pistons go with RK Tek. 4 personnes étaient ici. 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. its got 1900 miles on it with around 100 psi of compression so we are going to replace the pistons. The TRUTH of the matter is that MOST of these "Fix Kits" are nothing more than an Arctic Cat 800 Piston under a different name. RK Tek sets itself apart from other performance shops by testing its products in the best lab in the world - the great outdoors. 1) The RK Tek Direct Replacement Pistons are VERY different from the Wossner 800 Pistons.. yes, they are made by Wossner but they are VERY different in design. The truth is that the OEM piston's tolerances are in spec, they just don't stay there. If you are ordering cheater heads, we will need to have your OEM heads to make the modifications. You can have a BROKEN off lower skirt and the compression reading will not change! 2 were here. Both of these kits offer SIGNIFICANT performance enhancement and extend engine life! Does any one have an opinion on this? Snowmobiles: Brands, Performance & Modifications. Cart empty × Cart empty ... Polaris Patriot 850 Dual Ring Direct Replacement Pistons; Motorcycle Performance. Came off a 06 skidoo 800 rev. The piston kits we offer (some call a fix kit.. we do not) are the highest quality piston on the market today.. 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