Product description
The Prox Piston Kit For Honda CRF250R 2004-2007 77.98 mm is part of the latest collection from Prox.
Features:
- Kit includes piston, rings, wrist pin and circlips
- Precision machined on state of the art CNC equipment
- Made with low expansion, low friction alloy
Specifications:
- Bore - Oversize Metric: Standard
- Bore - Oversize: Standard
- Bore Size: 78.00 mm
- Compression Ratio Imperial: 12.9
- Compression Ratio: 12.9
- Displacement: 250 cc
- Engine Type: 4-Stroke
- Piston Material: Aluminum Alloy| Forged
- Piston Size Metric: 77.98 mm
- Piston Size: 77.98 mm
- Product Name: Piston Kit
- Skirt Coating: Moly Coated
To fit:
- HONDA CRF 250 R 2004 All Models
- HONDA CRF 250 R 2005 All Models
- HONDA CRF 250 R 2006 All Models
- HONDA CRF 250 R 2007 All Models
- HONDA CRF 250 X 2004 American Models
- HONDA CRF 250 X 2004 European Models
- HONDA CRF 250 X 2005 American Models
- HONDA CRF 250 X 2005 European Models
- HONDA CRF 250 X 2006 American Models
- HONDA CRF 250 X 2006 European Models
- HONDA CRF 250 X 2007 All Models
- HONDA CRF 250 X 2008 All Models
- HONDA CRF 250 X 2009 All Models
- HONDA CRF 250 X 2010 All Models
- HONDA CRF 250 X 2011 All Models
- HONDA CRF 250 X 2012 All Models
- HONDA CRF 250 X 2013 All Models
- HONDA CRF 250 X 2014 All Models
- HONDA CRF 250 X 2015 All Models
Manufacturer part number: 01.1338.B
View all Prox. View all Parts and spares.
Contents
Your package will include the following:
- 1 X Prox Piston Kit For Honda CRF250R 2004-2007 77.98 mm
To fit:
- HONDA CRF 250 R 2004 All Models
- HONDA CRF 250 R 2005 All Models
- HONDA CRF 250 R 2006 All Models
- HONDA CRF 250 R 2007 All Models
- HONDA CRF 250 X 2004 American Models
- HONDA CRF 250 X 2004 European Models
- HONDA CRF 250 X 2005 American Models
- HONDA CRF 250 X 2005 European Models
- HONDA CRF 250 X 2006 American Models
- HONDA CRF 250 X 2006 European Models
- HONDA CRF 250 X 2007 All Models
- HONDA CRF 250 X 2008 All Models
- HONDA CRF 250 X 2009 All Models
- HONDA CRF 250 X 2010 All Models
- HONDA CRF 250 X 2011 All Models
- HONDA CRF 250 X 2012 All Models
- HONDA CRF 250 X 2013 All Models
- HONDA CRF 250 X 2014 All Models
- HONDA CRF 250 X 2015 All Models

ProX is a Dutch brand specialising in high-quality replacement parts for motorcycles, motocross, ATVs, and other powersports vehicles. Their range includes pistons, connecting rods, clutch components, bearings, and valves, all manufactured to OEM standards. ProX parts are trusted worldwide for durability, precision, and performance, making them a go-to choice for riders.
Product description
The Prox Piston Kit For Honda CRF250R 2004-2007 77.98 mm is part of the latest collection from Prox.
Features:
- Kit includes piston, rings, wrist pin and circlips
- Precision machined on state of the art CNC equipment
- Made with low expansion, low friction alloy
Specifications:
- Bore - Oversize Metric: Standard
- Bore - Oversize: Standard
- Bore Size: 78.00 mm
- Compression Ratio Imperial: 12.9
- Compression Ratio: 12.9
- Displacement: 250 cc
- Engine Type: 4-Stroke
- Piston Material: Aluminum Alloy| Forged
- Piston Size Metric: 77.98 mm
- Piston Size: 77.98 mm
- Product Name: Piston Kit
- Skirt Coating: Moly Coated
To fit:
- HONDA CRF 250 R 2004 All Models
- HONDA CRF 250 R 2005 All Models
- HONDA CRF 250 R 2006 All Models
- HONDA CRF 250 R 2007 All Models
- HONDA CRF 250 X 2004 American Models
- HONDA CRF 250 X 2004 European Models
- HONDA CRF 250 X 2005 American Models
- HONDA CRF 250 X 2005 European Models
- HONDA CRF 250 X 2006 American Models
- HONDA CRF 250 X 2006 European Models
- HONDA CRF 250 X 2007 All Models
- HONDA CRF 250 X 2008 All Models
- HONDA CRF 250 X 2009 All Models
- HONDA CRF 250 X 2010 All Models
- HONDA CRF 250 X 2011 All Models
- HONDA CRF 250 X 2012 All Models
- HONDA CRF 250 X 2013 All Models
- HONDA CRF 250 X 2014 All Models
- HONDA CRF 250 X 2015 All Models
Manufacturer part number: 01.1338.B
View all Prox. View all Parts and spares.
Contents
Your package will include the following:
- 1 X Prox Piston Kit For Honda CRF250R 2004-2007 77.98 mm
To fit:
- HONDA CRF 250 R 2004 All Models
- HONDA CRF 250 R 2005 All Models
- HONDA CRF 250 R 2006 All Models
- HONDA CRF 250 R 2007 All Models
- HONDA CRF 250 X 2004 American Models
- HONDA CRF 250 X 2004 European Models
- HONDA CRF 250 X 2005 American Models
- HONDA CRF 250 X 2005 European Models
- HONDA CRF 250 X 2006 American Models
- HONDA CRF 250 X 2006 European Models
- HONDA CRF 250 X 2007 All Models
- HONDA CRF 250 X 2008 All Models
- HONDA CRF 250 X 2009 All Models
- HONDA CRF 250 X 2010 All Models
- HONDA CRF 250 X 2011 All Models
- HONDA CRF 250 X 2012 All Models
- HONDA CRF 250 X 2013 All Models
- HONDA CRF 250 X 2014 All Models
- HONDA CRF 250 X 2015 All Models

ProX is a Dutch brand specialising in high-quality replacement parts for motorcycles, motocross, ATVs, and other powersports vehicles. Their range includes pistons, connecting rods, clutch components, bearings, and valves, all manufactured to OEM standards. ProX parts are trusted worldwide for durability, precision, and performance, making them a go-to choice for riders.































