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, Polaris Patriot 850 Dual Ring Direct Replacement Pistons. RK Tek sets itself apart from other performance shops by testing its products in the best lab in the world - the great outdoors. Mine an OEM Ski-doo track and his is the predator 1. The REAL issue is that the OEM piston does not REMAIN in spec after use. It would have required a HUGE final bore machining/boring error for this to happen... again, this is a clever gimmick to try and sale you something! We have measured 100's of these cylinders and NONE of them have been out of spec! RK Tek is located in Preston, Idaho and is owned and operated by Kelsey and Rex (hence RK). There is NO problem with the sizing of the cylinders. I'm not sure as I'm a newbie. Skirt collapse happens usually WITHOUT any scoring or visual appearances on the piston. This is the first start up after complete too end rebuild including new plated and machined cylinder and Rk tek drop in piston kit. Voir. End gases will NOT be trapped in the squish band where they can't contribute to the power process. There IS a problem with the pistons . Piston … If you have any questionscall us anytime we're here to help. FINDINGS: We find that the OEM Polaris Piston will NOT hold its form after a very short time of running. We, REALLY, do address the OEM piston design issues with this kit. NOTE: ALL pistons come with Rings, Wrist Pin, and Circlips! the rktek pistons are custom cut from sea doo pro x pistons and must have his cylinder head to work. Shop with confidence. Sold as a set of 2. Snowmobiles: Brands, Performance & Modifications. Re: RK TEK head and new concept piston 2017 300 xcw test. Heat is one of the primary causes of skirt collapse and skirt collapse is ONE of the primary issues with the OEM design.. You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. They will NOT fail unless they are subjected to a low fuel or high heat condition! Seems to me they have the taper dialed in to be very close if not spot on to stock up to bottom of rings. Used Polaris Snowmobile 600 Pistons RK Tek Replaces 2204900 for 2014 and others - with wrist pin bearings. There are no "set-up" concerns, no reliability concerns. Voir. 2 were here. Have no worries.. HELP is finally here for the 800 Polaris CFI Engine! The OEM Polaris piston is 100% in spec and the proper size when new in the box! If you are looking to take it to the next level...Look for the 858 Big Bore Kit OR the DROP IN KIT, RK Tek is located in Preston, Idaho and is owned and operated by Kelsey and Rex (hence RK). They require ZERO added "treatment"! __________________________________________________________________________________________________________________________________. 2001 SKI-DOO SUMMIT 600 Left Or Right Cylinder Jug 76mm. We will open again on … RK Tek also has their own piston line to assure the best performance and longevity with ALL of the engines . BAR NONE! The RK Tek Pistons address this issue 100%! The RK Tek (www.2strokeheads.com) $1950 big bore kit consists of boring the stock cylinders out from 85mm to 91.5mm and fitting them with proprietary tight-fitting forged pistons. Ski-Doo: ZX Sleds. THIS is the #1 reason behind these cylinder failures associated with the Polaris Engine!! ______________________________________________________________________________________________. ______________________________________________________________________________________. In other words.. your piston can LOOK perfect but MEASURE out of spec. Please be aware of "CLAIMS" that the OEM cylinders are over-sized from the factory!! Our CUSTOM pistons (Direct replacement, Drop In, AND Big Bore) are CUSTOM designed! RK Tek Inc is your premier 2 Stroke Performance Shop.. ALL we do is 2 Stroke Engines! This is simply a sales "gimmick". Sell one like this. The piston we use is VERY CUSTOM! Less Stress = More longevity and more power! Sled: 05' Summit X 800 HO, RK TEK. MUCH Smoother running at ALL RPM.. Piston side loading is reduced due to our unique piston's weight. What an amazing difference. Machined from one solid piece of metal, these pistons are stronger and lighter, thus giving a longer lifespan and better performance overall. Polaris Patriot 850 Dual Ring Direct Replacement Pistons. We, usually, end up altering MANY of the OEM piston's design aspects and "correct" the short-comings we feel are present. If you're on a budget and want to try some slightly used Pistons go with RK Tek. Troubleshooting. Two actually as i have the head and test pistons on my both 2017 and 2011 bikes. The failure is caused by the piston clearance in the cylinder being ill-fitting and loose, allowing the pistons to rock in the cylinder bore. RK-PISCINES: Adresse (RCS) 112 AVENUE FRANKLIN ROOSEVELT: Code postal (RCS) 69120: Ville (RCS) VAULX EN VELIN: Pays (RCS) France: Nom (adressage INSEE) RK-PISCINES: Adresse (INSEE) 112 AV FRANKLIN ROOSEVELT: Code postal (INSEE) 69120: Ville (INSEE) VAULX-EN-VELIN: Pays (INSEE) France: Catégorie: Commerce de détail: Code APE (NAF) de l'entreprise : 4752A: Activité (Code NAF ou APE) … People always state "I pulled my OEM pistons and they LOOKED fine and compression reading was still in spec! SKI DOO > SHR 860 V. RK Tek Rev 800 Head(High Elevation 14. J'ai lu que les piston ring 2015 reglait les problemes connu sur les pro. We love talking to our customers. Below is a little information regarding the issues with the OEM Piston. I ran RK-Tek's drop in kit and got the MPEM recurved on my 2001 mxz 800, ran like a mofo with out any issues. NOTE: This will address the issues associated with the OEM pistons! Pistons PEUGEOT Citroën 104 – Visa Chrono – Samba Rallye 1219cc. The kit simply addresses the issues associated with the stock (OEM) Piston. Condition: Used. Mar 9, 2017 280 54 28 stillwater MN. Reliability is NOT compromised in any way, shape, or form and the cost is VERY affordable. Can't … The old setup when idling the coolant temp would gradually climb of course and continue to climb without hesitation. We, purposely, designed this kit to perform using the components! Kit includes caged bearings, dual ring pro x pistons, piston pins, piston rings,clips, base gasket and torque line billet head. Ski- Doo Rotax Engine Pistons and Rings The REAL reasons behind the Ski Doo 600/700/800 Twin Engine failures! RaceTec™ is the highest quality, precision manufactured piston option available, made out of forged or Billet 2618 aluminum alloy.