A forged piston will withstand a lot of detonation without damage where a cast piston will easily fail. Ring end gap should be measured with the ring square in the bore on a fresh hone. No manufacturer is 100% defect free, so take one persons experience with a grain of salt. 370-8052-Wossner Piston Kit-Gas Gas MC/EC250 '97-'19. | Browse our daily deals for even more savings! I think 4stroker was being a little facetious but he's right. The only reason I think its a wossner is that I can tell it has that black coating on the side when looking at it through the exhaust port. But seriously can you give any useful information or are you completely incapable? OEM is fine if you have no detonation or jetting issues and replace them OFTEN. Adding additional clearance than recommended may create extra engine noise (piston slap) upon start up and cold running. | Browse our daily deals for even more savings! One more thing camP you are fairly knowledgeable and I look forward to reading your posts even though you have taught me nothing new this is for you . That's reality. It is good practice to check over piston crown and valve pockets for and sharp edges. Using Clay is the most common method. Are you going to mention that? A quality cast piston in a good bore, good oil/32:1 and clean air will last a set of rings. Both are great pistons. Piston to Bore Clearance: Wossner pistons already have the recommended clearance built in. Buy Engine Pistons, Rods & Parts for 2012 Opel Corsa and get the best deals at the lowest prices on eBay! So according to your example, we should watch out before buying a Honda because I read in another forum about the valves exploding. Copyright© ThumperTalk, Inc. - All rights reserved.ThumperTalk® is a registered trademark. 15632 Graham St. Huntington Beach CA 92649. Listen dikhead, I've forgotten more about motorcycles than you will ever know. Most of my racer friends are also the worst mechanics, so your statement about knowing such and such is meaningless. Just learned from a friend that has the same issue. Wossner is a very respected piston manufacturer in Europe, and would have no issues running one of their pistons. I believe you are talking about Wossner (sorry I can't do the oumlot) they produce good pistons and have a lot of 993 and Gt3r slugs even up to 104mm. Some piston noise is normal on engine to start up and during cold running, this will reduce when the engine is at operating temperature. For the development of our snowmobiles, we work with our partners in the Scandinavian countries as well as with pr PLEASE READ CAREFULLY BEFORE INSTALLATION. Cylinder should be free of any taper. Why is that so hard for you to admit? Great Savings & Free Delivery / Collection on many items Wrist Pin Clips: Most of Wossner pistons use a Round Wire type lock. It's true. 5-6 engines all under 1500 kms . 40 hr for a pro 300 hr for a guy chasseing around his kid on a crf50. 15632 Graham St. Huntington Beach CA 92649. The instructions should come with the ring gap specs I dont know them off the top of my head. Please be patient while we are still making updates. By Wossner forged pistons have a low friction coating, use Mahle Aluminum piston material (higher Silicone content than their counterparts), resulting in less piston expansion, and they are made in Germany. *DO NOT COMPRESS LOCK TOGETHER TO GET INTO THE GROOVE, this will distort the lock and can cause lock failure. meatheads. Oh and usually its a good idea to relieve the exhaust bridge slightly. I always go forged FWIW, just make sure you warm them up good before wringing it's neck. On pistons with centered wrist pins, the smaller valve pocket(s) to the exhaust side of the engine except for some five valve engines. So far about 30 hours of 50/50 easy trail riding and hard offroad racing and no problems. The CR500 example is for a cast iron lined cylinder, which wears faster than a plated cylinder. They are marketed in the US under the Athena brand name. Lets agree to disagree. It is advisable to avoid high loads or high RPM during engine warm up. I think they have barrels for some of the units maybe Poton sleeves. Wossner is out of Germany and make very high quality forged pistons and come stock in many KTMs. Skip to main content.ca Hello, Sign in. skags, September 17, 2010 in Honda 2 Stroke. Prime Cart. Now lets talk about your 2 stroke dirt bike. Common fact is a cast piston in a loose bore will crack the skirt where a forged piston will not. If that's directed at me, I never said National #57 Roy Schellenberger worked on his bikes. It wiped out his cylinder in the process. You can go run your cast and us people who like to not have pistons break inside our engines run forged. Sharp edges should be removed to avoid potential “Hot Spots” on the piston. Its good stuff so run it with confidence. Try. Skirt diameter is smaller than the recommended bore size (see sizing on box). | Free shipping on many items! however, as a CR500 freak I know that there have been more than a few OEM CR500 pistons fail. Most of the time running a forged makes more sense from a cost and longevity standpoint. The point is a fast rider will get much less time out of a piston than a slow trail rider regardless of it being, Your ridiculously stupid comment that 99.9% of riders dont need a. Copyright© ThumperTalk, Inc. - All rights reserved. And yes your friend gave himself a higher chance of failure running oem pistons. 714-369-8547 or 714-369-8879 sales@wossnerpistons.com The pistons will fit to Audi 1.8T, Audi 2.0 TFSI, RS2 5 cylinder, Audi 2.7T Biturbo and Audi R8 V10 engines . From Price R2,271.00. ***Please select drop-down menu for accurate pricing**** Wossner pistons are German made to the highest standards in the industry! Piston to Head Clearance (Squish): Wossner recommends a minimum of 0.7-1.0mm (.027"-.040") for naturally aspirated engines and 1.0-1.5mm (.040"-.060") for Turbo, Supercharged, or Nitrous applications. Other parts such as connecting rods, needle bearings, crankshaft bearings and head seals are not included in our piston sets and piston kits. Get the best deal for Pistons, Rings, Rods & Parts for Audi TT from the largest online selection at eBay.com. Wossner Steel Connecting Rods. These pistons need to be installed with the offset to the thrust side of the engine. Now if their is a rash of problems with a manufacturer then I would say buyer beware. Should not say all will do the same . Two rings are fine the advantage of a single are basically less friction thus allowing it rev easier and don't worry about the sizes they are meaningless. All Wossner Forged Con Rods are made in Germany. 714-369-8547 or 714-369-8879 sales@wossnerpistons.com 99% of the riding public is slow and doesn't need a forged piston in their 2T unless they are sticking it in a worn out iron bore. 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. In Stock. If you want to just pick one up at your leisure and want to save some money, get the wiseco. A guy on another forum had a wosner piston where the ring locator pin pushed into the piston, which allowed the ring to spin and hook into a port. | … 2strokenumbnut says you can't do 20 hrs on a cast piston, LOL. He must be a dumbarsh for taking chances like that. You can post your opinion and call me names and I can post my opinion. MCB all wossne r pistons that I personally had to replace have knocked the skirts of this is in Polaris fix kits and skidoo 800r . Some applications: Nitrous, supercharged, turbo, and cold water marine engines may need more than the recommended clearance. Wossner Pistons USA. #8. If your cast piston breaks inside your engine, it's because you ran it so long that the clearances were worn way out of spec. I personally like Vertex cast pistons, since you can typically get them in A, B, C, D sizing. Insert one end of the lock in the groove and spiral lock into groove. Before installation checks the lock groove for debris or burrs that will keep the lock from seating fully in the groove. Wössner GmbH. Lubricate wrist pins with oil or assembly lube before installation. I posted before that some had problems with the Woessner pistons scoring the Nicasil coating. Just install the ring in the bore and check the ring gap with a feeler gauge. They work or they don't for the most part and both wiseco and wossner pistons work! I have never used Wossner but I know engine builders who prefer them over Wiseco. 370-8055-Wossner Piston Kit-RM125 '89-'99. Bottom line is, in racing everyone knows a forged piston is the best most durable piston. In a plated cylinder I would have no problem accumulating just as many hours on a cast piston as a forged one. Skirt diameter is smaller than the recommended bore size (see sizing on box). On the interwebs, delusional guys like you can claim to be "A" riders and some people might believe you. Don't worry about it man. I think 4stroker was being a little facetious but he's right. Wossner Pistons USA. We recommend a thin coating of oil on the piston skirt and cylinder wall. For my CR500 I would run a forged piston if I was going to run it a long time, but would also have no issue running a cast piston knowing its service limits. Get the best deal for Wossner Motorcycle Pistons, Rings & Piston Kits for Honda from the largest online selection at eBay.com. 1 product rating - Wossner - 8093DA - Piston Kit, 65.94mm Kawasaki KDX 200 0910-4822 With Wisecos we like to drill a line of holes at the exhaust bridge. You need to be a member in order to leave a comment. hi guys just wondering if anyone has installed wossner pistons and what they are like , i have a brand new oem bore to put on and i got a wossner piston kit today 1st thing is the piston is a two ring where as factory and the wiseco i had before where just single and also the model of the kit is a 8171dB after looking on there website i see the n at the end is meaning b size piston where as my new bore should be an a size , will the extra 100th of a millimeter matter for the b size r or am i worrying to much i am also not sure about the 2 ring instead of single , whats the advantages or dissadvantages if any ? Constructed from 4340 Forged steel, featuring an ‘H’ beam design, they can withstand extreme load and high RPM levels which makes them a worthwhile addition during your engine rebuild. We don't know when or if this item will be back in stock. btw CamP does know more than you about dirt bikes, believe it. Good for him! Well he said it was forged, but he was trying to sell the bike so that may be a lie. 300hrs? Adding additional clearance than recommended may create extra engine noise (piston slap) upon start up and cold running. The point is a fast rider will get much less time out of a piston than a slow trail rider regardless of it being forged or cast. When have I said anything to the contrary, numbnut? Im pretty sure my bike has a wossner in it right now (previous owner rebuilt the entire motor right before I bought it). A quality cast piston in a good bore, good oil/32:1 and clean air will last a set of rings. Keep telling people you haven't had a problem in 200 years blah blah blah. Wossner Piston Installation Instructions and ring end gap Important: Inspect all of your pistons, pins, rings before installation or modification.Parts that are altered, scratched, or damaged are non-returnable. Piston to Valve Clearance: With the many cam profiles, gasket thicknesses, and deck clearances available it is important to make sure there is adequate clearance between the piston and the valve. If you want to be an oddball and don't mind waiting order the wossner. In Stock. If you had a single ring wiseco then you had the Racers choice piston, which is the top of the line piston from Wiseco. 40 hr for a pro 300 hr for a guy chasseing around his kid on a crf50. Here comes another brilliant reply from 2strokenumbnut! We believe these are truly the best-forged piston on the market, and so will you! Avoid using Synthetic oil during engine break-in as this may keep the rings from properly seating. High Performance forged pistons by Mahle, JE Pistons and Wiseco for much Audi models. I better clarify on the wossner pistons. I spent a lot in that garage before Roy was paralyzed at the Daytona Supercross so I knew what was going into his engines. Piston to Bore Clearance: Wossner pistons already have the recommended clearance built in. NEW 2003-2019 KTM 85SX 85 SX TC85 Wossner Piston Kit 47.00 mm standard SX85 He never worked on his own bikes. Wossner Pistons Are An Ideal Replacement For O/E Cast Pistons, Which In Our Experience Can Fail Without Warning… Especially If The Engine Has Experienced Any Detonation As A Result Of D.I Cassette, Catalyst Problems Or Over – Boosting. Wossner pistons are measured 90 degrees from the pin axis at the widest point on the piston skirt. Sorry For confusion. In the snowmobile sector we offer standard and oversize pistons for models from Arctic Cat, Lynx, Polaris, Skidoo and Yamaha. 15632 Graham St. Huntington Beach CA 92649. If its too close take a file to it and get it in spec. get the right tools to take measurements and a workshop manual or send it to someone else who knows what they are doing. Shop with confidence on eBay! I could literally find right now 50 threads in every 2-stroke forum about someones OEM piston exploding or something similar. Important: Inspect all of your pistons, pins, rings before installation or modification. hi guys just wondering if anyone has installed. Pistons are one of those things where there's not a good, better, and best. 15632 Graham St. Huntington Beach CA 92649. 714-369-8547 or 714-369-8879 sales@wossnerpistons.com He even finished top 10 at Millville that year. Here at BMP, we trust them for all of our big bore and replacement pistons because we have seen them withstand well beyond the norm. It just makes sense, if failure is not an option, to run a forged over a cast. They are marketed in the US under the Athena brand name. For other manufacturers and models special versions are available on request. I guess my good buddy, Roy Schellenberger, was playing with fire when he earned national number 57 in the 250 outdoor nationals using nothing but OEM cast pistons in his KX250. Shop from the world's largest selection and best deals for Wossner Engine Pistons, Rods & Parts. jesus. This can cause damage to the pistons and/or cylinder. | Browse our daily deals for even more savings! Its great he lucked out and did so well. Konrad-Zuse-Strasse 2 D-79576 Weil am Rhein Germany Phone: +49 (0)7621 - 956649 - 0 Fax +49 (0)7621 - 956649 - … The high quality is evident once you hold one in … | Free shipping on many items! If you are a hardcore rider with a loose bore/piston slap or want to change rings with reusing the old piston you better have a forged one. The initial 3.8 for DP grand am and ALMS apps were produced by Wossner. His dad lived next door to me and did all his work. ring end gap needs to be right too. Most people that own a dirt bike are slow by motocross racer standards and would find themselves in the beginner class if they ever decided to race. From Price R2,954.00. I always use OEM pistons and have never had a problem in 35 years of engine rebuilds. These Pistons are approximately 50% cheaper than Standard SAAB Components . There was a problem adding this item to the Cart Please try again later. 370-8057-Wossner Piston Kit-KX125 '99-'00. Wossner recommends a minimum of 1.5mm (.060") Intake and 2.0mm (.080") Exhaust. Wossner Pistons USA. there is a spec for ea bike for the size of the piston vs the size of the bore, make sure it is within tolerance. Cast pistons are fine as long as your bore is within spec. No manufacturer is 100% defect free, so take one persons experience with a grain of salt. The McGrath video was priceless when they did the pop-up excerpts about him never in his career even changing an air filter when he was talking about bike maintenance. Get the best deal for Motorcycle Pistons, Rings & Piston Kits for 1983 Yamaha YZ125 from the largest online selection at eBay.com. 714-369-8547 or 714-369-8879 sales@wossnerpistons.com Parts that are altered, scratched, or damaged are non-returnable. This can cause damage to the pistons and/or cylinder. Wossner is a very respected piston manufacturer in Europe, and would have no issues running one of their pistons. Account & Lists Account Returns & Orders. Come on. Your ridiculously stupid comment that 99.9% of riders dont need a forged piston.. Wrist Pin Offset: Many Wossner pistons have an offset wrist pin. Either way, she runs great.