Up for sale is a New Wiseco Top End Piston Kit (Part # PK1729) designed specifically for 1997–2009 Honda XR70 and CRF70 dirt bikes.
Wiseco is the industry leader in forged performance pistons, offering superior strength, reliability, and power compared to cast factory alternatives. This complete top-end package is perfect for your next engine rebuild or routine maintenance.
Key Features & Specifications:
Premium Forged Construction: Provides maximum durability and resistance to high temperatures.
47mm Bore Size: Standard dimension designed to match stock or compatible setups perfectly.
Complete Package: Includes the main piston package components required for a proper top-end refresh.
Part Numbers Included: Main kit PK1729, Piston 4880M04700.
Wiseco Top End Kit – Standard Bore 47.00mm, 10.5:1 Compression
This top end kit contains all the necessary components for rebuilding your top end. The kit includes forged pistons, rings, wrist pins, circlips, and a top end gasket set.
Specifications
- Bore: 47.00mm (Standard)
- Compression Ratio: 10.5:1
- Displacement: 72cc
- Stroke Length: 41.40mm
- Cylinders: 1
- Piston Diameter: 46.97mm
- Piston Material: 4032 Aluminum Alloy
- Skirt Coating: Non-Coated
- Engine Type: 4-Stroke
Kit Contents
- Forged piston
- 1850XE ring set (47.00mm)
- Wrist pin – 13mm x 1.535in (S592)
- Round wire pin locks – 13mm, pair (CW13)
- Top end gasket set
Features
- Forged pistons are tougher and more durable than cast pistons
- Dedicated forgings allow for optimized strength-to-weight ratio
- Designed and built for each specific 4-stroke powersports engine
- Improved tensile strength of forged material optimizes strength and service life
- Domed 2-valve piston design
- Wiseco ring types are not interchangeable; correct replacement ring style is stamped on the dome of the piston
Note: Cylinder boring required for oversizes. Cylinder sleeves must be purchased separately.
Fits the following:
- Honda CRF70F: 2004-2009, 2011-2012
- Honda XR70R: 1997-2003