PISTON KIT 74.00 CR 9.5:1 YFM250RX 08-13, XT250 13-19, WISECO 4951M07400 YAMAHA ATV

The Wiseco forged piston kit with a 74.00mm bore is designed as a direct replacement for Yamaha YFM250R Raptor (2008–2013), YFM250RX (2008–2013), and XT250 (2013–2019) models. Built in the USA, this high-performance piston is forged for strength and durability, with a moly skirt coating to reduce friction and wear.

Features

• Forged piston designed for high strength and resistance to impact and fatigue
• Moly skirt coating for reduced friction and improved wear resistance
• Manufactured in-house with full control over the forging and machining process
• Direct OEM replacement
• Made in the USA

Specifications

• Displacement: 249 cc
• Bore (Standard): 74.00 mm
• Actual Bore Diameter: 73.95 mm
• Stroke: 58.00 mm
• Compression Ratio (Actual): 9.5:1
• Skirt Coating: Moly
• Bore Oversize: STD

Cross-Reference OEM Part Numbers

• Piston: 4951M07400
• Part No.: 56-W4951.WI
• Ring Set: 2913XA
• Locks: CW17 (17mm Round Wire Locks - Set of Two)
• Pin: S688 (17 x 42 mm Non-Chromed TW)

Vehicle Fitments

• Yamaha YFM250R Raptor 2008–2013
• Yamaha YFM250RX 2008–2013
• Yamaha XT250 2013–2019

Dispatch Times

Local Stock: Dispatches in < 24 hours

Parts showing as available at our Warehouse in Gorey ship the same business day if ordered before 1pm. 

Supplier Stock: Dispatches in 2-4 Days

Parts showing as available at our Supplier Warehouse are ordered from our supplier and delivered to us before we can dispatch. More info is available on this page under "Stock Availability".

OEM Special Order: Dispatches in 3-10 Days

This website does not have access to live stock levels from our OEM Suppliers. In most cases the parts will be available but in the case of backordered parts we will notify you. We receive parts from Yamaha in 3-4 days, All others including Honda, Suzuki, Kawasaki, Polaris please allow 7-10 days for us to receive the parts. 

Delivery Times

Ireland & Northern Ireland:

1-2 Days using GLS/An Post

Germany, France, Netherlands, Belgium:

3-5 Days using GLS/Fedex

Italy, Spain & Other EU Countries:

4-7 Days using GLS/Fedex