4785M09500 Wiseco Std Piston Kit for Yamaha WR450F 2003-2015 95.00 mm 12.5:1 CR
4785M09500 Wiseco Std Piston Kit for Yamaha WR450F 2003-2015 95.00 mm 12.5:1 CR
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Piston Kit for Yamaha WR450F
This Wiseco standard bore piston kit for Yamaha WR450F models from 2003 through 2015 delivers a 95.00 mm bore with a 12.5:1 compression ratio, cross-referenced under part number 4785M09500.
Overview
This piston kit for Yamaha WR450F is a forged top end replacement made to standard bore dimensions. The 95.00 mm piston with a 12.5:1 compression ratio balances compression and pump fuel compatibility for trail and enduro riding. It is built for riders and shops servicing 2003 to 2015 WR450F machines that need a reliable replacement piston.
Built For Performance
- Forged construction for durability under load
- 95.00 mm standard bore sizing for a direct fit
- 12.5:1 compression ratio suited to pump fuel
- Kit includes piston, rings, pin and clips
- Cross-referenced to part number 4785M09500
- Machined skirt profile for smooth cylinder contact
Fits These Machines
- for Yamaha WR450F 2003
- for Yamaha WR450F 2004
- for Yamaha WR450F 2005
- for Yamaha WR450F 2006
- for Yamaha WR450F 2007
- for Yamaha WR450F 2008
- for Yamaha WR450F 2009
- for Yamaha WR450F 2010
- for Yamaha WR450F 2011
- for Yamaha WR450F 2012
- for Yamaha WR450F 2013
- for Yamaha WR450F 2014
- for Yamaha WR450F 2015
On-The-Job Use
- Top end rebuilds after compression loss or piston damage
- Trail and enduro riding on the WR450F
- Scheduled maintenance at recommended service intervals
- Refreshing a high hour engine before the season
Specs At A Glance
| Part Number(s) | 4785M09500 |
| Bore Size | 95.00 mm |
| Compression Ratio | 12.5:1 |
| Piston Type | Standard bore |
| Construction | Forged |
Good To Know
Q: Does this kit come with rings and a wrist pin? A: Yes, this style of piston kit typically includes the piston, rings, wrist pin and retaining clips for a complete top end assembly.
Q: Is the cylinder bore checked before fitting? A: Always measure bore and clearance against the service manual, because a worn cylinder will reduce the service life of any new piston.
Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.
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