Find used OEM parts for the Yamaha Grizzly 600 at Sun Coast Cycle Sports. Produced from 1998 through 2001, the Grizzly 600 was the original big-bore utility ATV that launched the Grizzly nameplate and redefined what utility quads could do. Powered by a 595cc air-cooled single-cylinder four-stroke engine derived from the Yamaha XT600 dual-sport, the Grizzly 600 featured Ultramatic CVT transmission, selectable 2WD/4WD, and was the largest-displacement production ATV of its era. It was replaced by the Grizzly 660 in 2002. All parts in our catalog are inspected by our Florida-based technicians and listed with individual photos.
Grizzly 600 generation and parts compatibility
The Grizzly 600 was produced for four model years (1998-2001) with minimal changes. The 595cc XT600-derived engine, Ultramatic CVT, and selectable 4WD system remained consistent throughout. The primary updates were cosmetic color changes.
The Grizzly 600 and Grizzly 660 are related but distinctly different platforms. The 600 uses a 595cc engine derived from the XT600 with SOHC and 2 valves, while the 660 uses a 660cc engine derived from the Raptor 660 with SOHC and 5 valves per cylinder. The most significant chassis difference is the rear suspension: the Grizzly 600 uses a rigid rear axle with a single shock, while the 660 has independent rear suspension with dual shocks. This makes the frames, rear suspension, and rear axle components completely non-interchangeable between the 600 and 660. Some front suspension components, controls, and electrical items may cross, but this should be verified per part number.
Common Grizzly 600 failure points and replacement parts
Fuel overheating and vapor lock (early models): The original 1998-2001 Grizzly 600 had a known issue with fuel overheating in hot weather due to the fuel tank's proximity to the engine. This caused vapor lock symptoms including stalling, hard re-starting, and poor running when hot. Yamaha addressed this with a recall that included vented side panels and a heat reflector under the fuel tank. Used Grizzly 600s should be checked for these updated components.
CVT belt wear: The Ultramatic CVT belt wears over time, especially under heavy loads or in mud. Belt inspection and replacement are routine maintenance items.
Carburetor issues: The single Mikuni carburetor is susceptible to ethanol damage and varnish buildup from stale fuel. Carb cleaning or rebuilding is frequently needed on bikes that sit between seasons.
Rear axle and differential wear: The solid rear axle uses a gear reduction and differential that need periodic fluid changes. Neglected gear oil leads to premature wear and noisy operation.
Starter clutch and starting issues: The one-way starter clutch can wear, causing the starter to spin without engaging. This is a common age-related issue on Grizzly 600s with higher hours.
Commonly replaced Grizzly 600 parts
- CVT drive belt and clutch components
- Carburetor rebuild kit and fuel system components
- Heat reflector and vented side panels (recall)
- Starter clutch and starter motor
- Rear axle bearings and differential seals
- Wheel bearings (front and rear)
- Plastics, fenders, and bodywork
- Brake pads and brake hardware
Frequently asked questions
Q: Will Grizzly 660 parts fit a Grizzly 600?
Very few parts cross between the Grizzly 600 and 660. The two models use different engines (595cc 2-valve vs. 660cc 5-valve), different rear suspension designs (rigid axle vs. IRS), and different frames. Some front suspension components, handlebar controls, and electrical connectors may be shared, but engine, transmission, rear end, and bodywork parts are not interchangeable.
Q: Was the Grizzly 600 fuel overheating problem fixed?
Yamaha issued a recall for the fuel overheating issue that included installing vented side panels and a heat reflector under the fuel tank. These modifications significantly reduced vapor lock occurrences. When purchasing a used Grizzly 600, verify that the recall has been performed by checking for vented side panels and the heat shield.
Q: What engine is in the Grizzly 600?
The Grizzly 600 uses a 595cc air-cooled SOHC 2-valve single-cylinder engine derived from the Yamaha XT600 dual-sport motorcycle. It produces approximately 37 hp and is paired with the Ultramatic CVT automatic transmission. This engine was replaced in 2002 by the 660cc 5-valve engine in the Grizzly 660.
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