Wiseco Piston Kit for 2003-18 Yamaha YFM 450 models - 85.50 mm - 4939M08550
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Wiseco Performance Oversized Piston Kit
- These kits contain everything you need to complete your piston repair, the first time
- High Performance ring kit and alloy pin included with each piston kit for extended life and sustained power.
- Dedicated forgings used for superior strength to weight ratio utilizing aerospace alloy.
- All Piston Kits are precision crafted and forged in the USA
Wiseco's Piston Kits are offered for nearly every popular application in the powersports market. These kits contain everything you need to complete your piston repair, the first time. High quality parts specifically chosen by us to match our forged pistons are included in this kit for easy one stop shopping. 2-stroke kits feature our Pro-Lite pistons that are CNC machined for optimal cam shape and profile for peak HP and service life. 4-stroke kits feature a race-ready dome finish with smooth edges for improved combustion flow. Horizontal slot-pin oiling reduces friction and provides scuff resistance, along with a pressure seal groove for maximum ring seal. 4-stroke race applications feature Wiseco's Armor Glide skirt coating to provide reduced friction and noise to contribute to increased horsepower. Each piston is built from race proven designs that are chosen by the top race teams in all forms of racing including Supercross, Motocross, GNCC, Super-bike, and more.
Product Line Wiseco Piston Kit Part Number 4939M08550 Fitment Type Model-Size Specific Fitment Use Type Aftermarket Performance Replacement Unit Sale Qty Kit Style Position Material ALUMINUM ALLOY / FORGED Finish Piston/Cylinder Size 85.50 mm Piston Size Added 1.00 mm Cylinder Stroke Volume 75.00 mm Final Engine Displacement 431 cc California Emissions FALSE Product Disclaimer You MUST measure the size of your cylinder BEFORE ORDERING. Damage/Return of a piston due to ordering the wrong size will not be accepted. Fitment Note Fitment Note Fitment Note Fitment Note Fitment Note 8550XX - 85.50MM RING SET
CW20 - 20mm Round Wire Locks - Set of Two
Ring - Set
S520 - PistonPin 20mm x 2.362" NonChromed TW2018 Yamaha YFM450F Kodiak
2014 Yamaha YFM450F Grizzly
2013 Yamaha YFM450F Grizzly
2012 Yamaha YFM450F Grizzly
2011 Yamaha YFM450F Grizzly
2010 Yamaha YFM450F Grizzly
2009 Yamaha YFM450F Grizzly
2008 Yamaha YFM450F Grizzly
2010 Yamaha YFM450F Wolverine
2009 Yamaha YFM450F Wolverine
2008 Yamaha YFM450F Wolverine
2007 Yamaha YFM450F Wolverine
2006 Yamaha YFM450F Wolverine
2009 Yamaha YXR450 Rhino
2008 Yamaha YXR450 Rhino
2007 Yamaha YXR450 Rhino
2006 Yamaha YXR450 Rhino
2006 Yamaha YFM450F Kodiak
2005 Yamaha YFM450F Kodiak
2004 Yamaha YFM450F Kodiak
2003 Yamaha YFM450F Kodiak - These kits contain everything you need to complete your piston repair, the first time
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Shipping Policy
Items will be shipped within 1 business day from the date of purchase to the address provided. Orders submitted before 3PM EST will often ship the same day. We will use an appropriate shipping service and/or carrier based on the shipping service selected at checkout and can not be changed/upgraded/modified in any way once the order is submitted.
Shipping Address RestrictionIf your address has a carrier restriction and is not serviced by one or more of the US domestic carriers (USPS, UPS or FedEx), then it is YOUR RESPONSIBILITY to notify us of this restriction at the time of purchase with either an order note entered before checkout, or a direct message within 15 minutes of order submission.
International PurchasesAll items shipped internationally will be shipped with customs declaration of purchase value; ALL duties/tariffs/fees imposed by the destination country are the buyers responsibility and are NOT calculated or imposed by us at any level and we are not liable for any additional cost that your destination country imposes. Often, these fees are due prior to or at delivery of the shipped product/s and are not subject to negotiation. If you have questions about the calculation of the fees, please contact your home nations customs/import agency for additional details as we have no control over how these amounts are calculated.
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Sales Terms
All orders must be paid in full before an order can be shipped. Cost of any additional shipping service upgrades are due at the time of checkout and can not be added once the order is complete. Certain destinations are subject to sales tax which is calculated and applied to the order total before checkout and order submission.
Part Compatibility PolicyApplication specific parts will have part compatibility indicated in the "Fits" or "Fitment" section of the product description and will be provided for all application specific products. These fitment indications are sourced from the product manufacturer and may be subject to change. Please be careful in reading any/all fitment indications for exact Year-Make-Model-Sub Model indications to make sure the part ordered will fit your exact application/s. If you are uncertain about a part compatibility and will to clarify before purchase, please feel free to message us at anytime and an experienced support staff member will assist you in verifying fitment to his/her best ability.
Image PolicyProduct specific images displayed on listings will be provided IF available, and when not available, a generic (non-specific) image will be provided that represents the general product type listed. Listing images should not be used as the exclusive basis for making your purchase decision and it is the customer responsibility to review the product description and all fitment indications before adding the item to cart.
Return PolicyAt SVS Powersports we understand that a product does not always look, fit or function as expected. If such a situation arrises, we do accept returns of all Unopened, Unused items with original packaging within 30 days of purchase/delivery. If your item is damaged, defective or completely different from the item ordered, please DO NOT submit a return request, please contact our knowledgable support staff with a clear description of the issue and someone will get back to you in a prompt time frame.
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Additional Support
At SVS Powersports we are proud to offer unparalleled level of customer support and if any question or issue should arise, do not hesitate to contact us at any time. We have a very experienced and knowledgable support staff that can assist you with virtually any inquiry. Support staff is available 6 Days a week (Monday Thru Saturday) 10AM to 6PM EST by calling 1-800-787-5817 OR via email at inquiries@svspowersports.com with most inquiries responded to within less than an hour during our staff support hours. If you contact us outside these hours, we may still get back you right away, but a response may be delayed until the next business day.
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