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102mm Big Bore Cylinder Piston Kit for Yamaha Grizzly 660 Rhino 660 Raptor 660R
102mm Big Bore Cylinder Piston Kit for Yamaha Grizzly 660 Rhino 660 Raptor 660R
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Product Overview
Upgrade or rebuild a compatible Yamaha 660 top end with this 102mm big bore cylinder and piston kit, designed for selected Grizzly 660, Rhino 660, and Raptor 660R applications.
The stock Yamaha 660 engine uses an approximately 100mm bore, while this kit increases the bore to 102mm. When used with the original 84mm stroke, the resulting displacement is approximately 686cc-class.
The kit features a 102mm cylinder bore and 102mm piston, with listed mounting dimensions of approximately 120mm × 110mm and 20mm mounting-hole diameter.
Product Compatibility
| Make | Model | Model Code | Year Range |
|---|---|---|---|
| Yamaha | Grizzly 660 | YFM660 | 2002–2008 |
| Yamaha | Rhino 660 | YXR660 | 2004–2007 |
| Yamaha | Raptor 660R | YFM660R | 2001–2005 |
OEM Cross-Reference Numbers
Yamaha 660 Cylinder Family
- 5KM-11310-00-00 — Cylinder
- 3YF-11310-00-00 — Earlier cylinder reference
- 3YF-11310-01-00 — Earlier cylinder reference
Related Yamaha 660 Top-End References
- 3YF-11631-00-X0 — Standard piston reference
- 3YF-11633-01-00 — Piston pin
- 93450-24028-00 — Piston pin circlip
- 3YF-11181-00-00 — Cylinder head gasket
- 3YF-11351-00-00 — Cylinder base gasket
- 93211-01467-00 — O-ring
- 90105-10649-00 — Cylinder-related flange bolt
- 90105-09648-00 — Cylinder-head-related flange bolt
Important OEM Note: These OEM numbers identify the original Yamaha 660 engine family and related components. The aftermarket 102mm piston and cylinder are oversized parts, so the original 100mm piston/ring numbers should be treated as application references rather than exact dimensional replacements.
Specifications
| Specification | Details |
|---|---|
| Product Type | Big Bore Cylinder & Piston Kit |
| Engine Platform | Yamaha 660 |
| Engine Type | 4-Stroke, Single Cylinder |
| Cylinder Bore | Approx. 102 mm / 4.02 in |
| Piston Diameter | Approx. 102 mm / 4.02 in |
| Piston Height | Approx. 54 mm / 2.13 in |
| Mounting-Hole Spacing | Approx. 120 mm / 4.72 in |
| Secondary Mounting Spacing | Approx. 110 mm / 4.33 in |
| Listed Mounting-Hole Diameter | Approx. 20 mm / 0.79 in |
| Stock 660 Bore | Approx. 100 mm |
| Approx. Displacement with Stock Stroke | 686cc-Class |
| Replacement Type | Aftermarket / Big Bore |
| Condition | New |
Key Features
- 102mm Big Bore: Increases bore from the standard 100mm Yamaha 660 configuration.
- 660 Engine Compatibility: Designed for compatible Grizzly 660, Rhino 660, and Raptor 660R engines.
- Cylinder + Piston Kit: Intended for compatible top-end rebuilding or big-bore conversion.
- OEM-Family Reference: Cross-references the original 5KM / 3YF Yamaha 660 cylinder and piston family.
- Dimension-Based Fitment: 102mm bore, piston dimensions, mounting pattern, and gasket shape should all be checked before installation.
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Fitment FAQ
Will this part fit my specific model and year?
This kit is intended for compatible:
2002–2008 Yamaha Grizzly 660
2004–2007 Yamaha Rhino 660
2001–2005 Yamaha Raptor 660R
Verify the original engine and cylinder configuration before ordering.
Do I need to match the OEM part number?
Matching the original cylinder family is strongly recommended.
The primary cylinder reference is:
5KM-11310-00-00
Earlier associated references include:
3YF-11310-00-00 / 3YF-11310-01-00
Because this is a 102mm oversized kit, the supplied piston and rings will not use the same dimensions as the original 100mm Yamaha piston.
What models or situations does this part not fit?
Do not assume this kit fits:
Yamaha Grizzly 700
Yamaha Raptor 700R
Other Yamaha 700cc engine platforms
Engines using a different cylinder base
Applications with different cylinder-stud spacing
Engines with incompatible piston-pin dimensions
Engines requiring a different gasket or combustion-chamber design
What should I check before ordering?
Confirm:
Yamaha Grizzly 660 / Rhino 660 / Raptor 660R
Compatible 5KM / 3YF 660 engine family
102mm cylinder bore
102mm piston
Approx. 54mm piston height
Approx. 120mm × 110mm mounting pattern
Cylinder sleeve diameter and crankcase clearance
Piston-pin dimensions
Head-gasket bore
Base-gasket shape
Piston crown and valve clearance