Piston Kit OS 0.50 - Yamaha YFM 660 Grizzly Rhino Raptor 2002
Piston Kit OS 0.50 - Yamaha YFM 660 Grizzly Rhino Raptor 2002 is backordered and will ship as soon as it is back in stock.
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- Standard delivery (2-4 working days) - £4.99 on eligible UK mainland orders under £50.
- Express delivery - £6.99 on eligible UK mainland orders placed before 2pm.
- Large equipment including international orders are subject to different delivery rates and timescales.
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Piston Kit OS 0.50 - Yamaha YFM 660 Grizzly Rhino Raptor 2002 is backordered and will ship as soon as it is back in stock.
Engineered to meet or exceed Yamaha’s performance benchmarks, this OS 0.50 oversize piston kit restores compression and sustained power for Yamaha YFM 660 Grizzly, Rhino, and Raptor models manufactured from 2002 through 2007. The kit is designed to drop into the stock bore with tight, precision tolerances, delivering reliable top-end sealing and improved throttle response. It’s an ideal choice when you’re chasing lost compression from worn rings, bore wear, or consistent power fade after years of trail and farm use.
This aftermarket replacement is precision-machined to restore peak performance in demanding riding conditions. The OS oversize approach helps reclaim lost compression by compensating for bore wear, reducing blow-by, and reestablishing power for difficult climbs, heavy loads, and long days on rough terrain. For trail riders and farm work alike, it offers a dependable, bolt-in solution that revives engine efficiency without resorting to a full engine rebuild.
OEM & Aftermarket Cross-Reference Information
| Part Number | Brand / Type | Cross-Reference Notes |
|---|---|---|
| 2C6-11636-00-00 | OEM | Cross-reference to aftermarket OS 0.50 piston kit; fits Yamaha YFM 660 Grizzly/Rhino/Raptor (2002 - 2007) |
| 3YF-11636-00-00 | OEM | Cross-reference to aftermarket OS 0.50 piston kit; fits Yamaha YFM 660 Grizzly/Rhino/Raptor (2002 - 2007) |
What’s Included
This piston kit comes complete with the essential top-end components you need for a proper refresh.
- Piston
- Rings
- Wrist Pin
- Piston Circlips
Fitment
| Manufacturer | Models / Series | Years / Details |
|---|---|---|
| Yamaha | YFM 660 Grizzly | 2002 - 2007 |
| Yamaha | YFM 660 Rhino | 2002 - 2007 |
| Yamaha | YFM 660 Raptor | 2002 - 2007 |
Specifications
| Attribute | Details |
|---|---|
| OEM Reference Part Numbers | 2C6-11636-00-00, 3YF-11636-00-00 |
| Type | Piston Kit OS 0.50 oversize |
| Manufacturer | Aftermarket Replacement |
| Application | Cylinder/piston kit for Yamaha YFM 660 Grizzly, Rhino, and Raptor (2002 - 2007) |
| Piston Material | Forged aluminum |
| Bore Size / Oversize | 100.50 mm / Oversize +0.50 mm (OS 0.50) |
| Stroke | 84.0 mm |
| Displacement | 686 cc |
Installation Notes
- Verify bore size before installation and confirm you need OS 0.50 oversize; re-bore if the cylinder shows excessive wear beyond tolerance.
- Thoroughly clean the cylinder, honing deposits and scoring before installing rings and the piston; inspect ring grooves for wear.
- Lubricate the piston, rings, and wrist pin with assembly lube or clean engine oil during assembly to prevent dry startup.
- Install rings in the correct orientation and stagger ring gaps to minimize blow-by; use a proper ring compressor for even seating.
- Insert the wrist pin and secure with circlips, ensuring clips are fully seated and not protruding into the oil passage.
- Follow the engine’s service manual for any related gasket replacements and final torque checks on adjacent fasteners; avoid over-tightening bearings or fasteners around the cylinder head.
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