Used OEM parts for the Yamaha Raptor 660 are available at Sun Coast Cycle Sports. Produced from 2001 through 2005, the Raptor 660 (YFM660R) was the first big-bore sport ATV and the machine that launched an entirely new category in the quad market. Powered by a 660cc liquid-cooled five-valve single-cylinder engine with dual Mikuni carburetors, five-speed manual transmission, and chain drive, the Raptor 660 replaced the iconic two-stroke Banshee 350 as Yamaha's performance flagship. All parts in our inventory are sourced from donor machines, checked by our technicians, and ship with individual photos from our Florida location.
Raptor 660 generation and parts compatibility
The Raptor 660 was produced from 2001 to 2005 with running changes but no major generation breaks. The 2001 first-year models had a known second-gear engagement issue that Yamaha corrected from 2002 onward. A 2004 recall addressed rear brake performance concerns related to engine vibration agitating the master cylinder reservoir. All Raptor 660s share the same engine, frame, and mechanical components across the full production run, with the noted improvements in later years.
The Raptor 660 shares its five-valve engine architecture with the Grizzly 660 utility ATV (2002-2008). Some internal engine components (cylinder, piston, head, valvetrain) may cross between the two, though the Grizzly uses a CVT automatic while the Raptor has a manual gearbox, and tuning differs significantly. The Raptor 660 does not share parts with the Raptor 700 (2006+), which uses a completely different 686cc four-valve fuel-injected engine in a redesigned chassis. The Raptor 660 also shares no components with the Raptor 350, which uses the smaller Warrior 350 engine platform.
Common Raptor 660 failure points and replacement parts
Second gear engagement (2001 models): First-year 2001 Raptor 660s had a documented issue with second gear popping out under load. Yamaha corrected the gear design from 2002 onward. Used 2001 models should be checked for this issue.
Starter clutch weakness: The one-way starter clutch is a known wear point on the Raptor 660. Symptoms include a whirring or grinding sound when the starter is engaged without the engine turning over. Replacement requires splitting the engine cases on some models.
Top-heavy center of gravity: The Raptor 660's engine placement results in a higher center of gravity compared to later sport quads. This contributes to instability during aggressive riding and is a design characteristic rather than a component failure. Riders commonly address this with aftermarket suspension and wider A-arms.
Carburetor synchronization: The dual Mikuni 33mm carburetors require periodic synchronization for smooth power delivery. Out-of-sync carbs cause flat spots, uneven power, and poor throttle response.
Rear brake master cylinder (2004 recall): Engine and driveline vibration during sustained high-RPM riding could agitate the rear brake fluid reservoir, introducing air bubbles and reducing rear brake performance. Yamaha issued a recall to address this on affected 2004 models.
Commonly replaced Raptor 660 parts
- Starter clutch and starter motor
- Transmission gears (especially 2001 second gear)
- Carburetor rebuild kits and synchronization hardware
- Chain, sprockets, and chain tensioner
- Brake pads, rotors, and master cylinders
- Plastics and fender assemblies
- Radiator and cooling system hoses
- Clutch plates and clutch basket
- A-arm bushings and suspension components
Frequently asked questions
Q: Does the Raptor 660 share engine parts with the Grizzly 660?
Both the Raptor 660 and Grizzly 660 use the same basic 660cc five-valve single-cylinder engine. Some internal engine components may cross between the two. However, the Raptor uses a five-speed manual transmission while the Grizzly has a CVT automatic, so transmission parts do not interchange. Intake, exhaust, and tuning also differ between the sport and utility applications.
Q: Will Raptor 700 parts fit a Raptor 660?
No. The Raptor 700 (2006+) is a completely different platform from the Raptor 660. The 700 uses a 686cc four-valve fuel-injected engine in an aluminum/steel hybrid frame, while the 660 uses a 660cc five-valve carbureted engine in a different chassis. Engine, frame, suspension, and bodywork parts are not interchangeable between the two.
Q: What year Raptor 660 should I avoid?
The 2001 first-year models had the second-gear engagement issue. While many 2001 units have been repaired, the 2002-2005 models are generally preferred for reliability. The 2004-2005 models represent the most refined versions of the platform.
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