Yamaha YFM350A Grizzly 350 / YZF600R Complete Engine Motor

This high-quality complete engine assembly is designed as a direct OEM replacement for two classic Yamaha power models: YFM350A Grizzly 350 ATV and YZF600R street sport motorcycle. Adopting mature 4-stroke air-cooled technology, this motor features stable power output, reliable cold start performance and excellent overall durability. Every engine is fully pre-assembled and strictly factory tested, effectively solving common failures including weak power, hard starting, oil leakage, idle jitter and abnormal noise. It is the perfect cost-effective replacement solution for aging original engines, suitable for ATV off-road working and motorcycle daily street high-speed riding.

• Exact OEM fit for Yamaha YFM350A Grizzly 350 ATV and YZF600R sport motorcycle
• Durable 4-stroke air-cooled structure, stable heat dissipation for long-hour continuous operation
• Strong low-end torque for ATV farm work & climbing; linear acceleration for street sport riding
• Reinforced anti-vibration and wear-resistant internal structure, low failure rate under heavy use
• Optimized carburetor fuel system for stable combustion and reliable cold start
• Full complete assembly, direct bolt-on installation with zero modification required
• 100% compression, pressure and idle running tested before shipment
• High-precision core components, long service life and low maintenance cost
• Fully compatible with original frame, wiring harness, fuel system and exhaust system

YFM350A Grizzly 350 (ATV)
Engine Type: 4-Stroke, Single Cylinder, Air-Cooled, SOHC
Displacement: 346cc
Bore × Stroke: 86mm × 59.6mm
Max Power: 21kW / 7500rpm
Max Torque: 30Nm / 5500rpm
Ignition: Digital CDI
Starting Mode: Electric Start
Fuel System: Carburetor
Lubrication: Pressure & Splash Combined Lubrication

YZF600R (Motorcycle)
Engine Type: 4-Stroke, Inline 4-Cylinder, Air-Cooled
Displacement: 599cc
Max Power: 72kW / 10000rpm
Max Torque: 65Nm / 8500rpm
Ignition: Digital CDI
Starting Mode: Electric Start
Fuel System: Carburetor
Lubrication: Full Pressure Lubrication

Universal: Recommended 10W-40 4-stroke engine oil

The engine casing is made of high-strength die-cast aluminum alloy, lightweight, impact-resistant and durable for complex road conditions. Thickened cast iron cylinder liner provides excellent wear resistance and high-temperature resistance, preventing cylinder pulling during long-time operation. Forged steel crankshaft and connecting rod are dynamically balanced to ensure stable running without jitter. Heat-resistant piston and precision valve train guarantee sufficient combustion efficiency and stable power output. Integrated heat dissipation rib design ensures efficient air cooling performance, greatly improving overall engine stability and service life.

Compatible Models:
• Yamaha YFM350A Grizzly 350: All year models, full trim levels ATV
• Yamaha YZF600R: All generation street sport motorcycles

Fitment Advantage: 100% OEM standard mounting holes, wiring interfaces and fuel pipeline positions. Plug-and-play direct replacement, no drilling, cutting or modification needed. Perfectly matches original frame, transmission and exhaust system with ultra-high fitting accuracy.

All engines are produced in ISO9001 certified factories with standardized production processes. Each finished unit undergoes strict pre-shipment tests, including compression test, oil pressure sealing test, idle stability test and load endurance test to ensure zero leakage, sensitive startup and stable power. We provide 6-month professional quality warranty. Non-human damaged quality issues support free replacement and professional technical after-sales service for global dealers and individual users.

Adopts professional export-grade packaging with internal anti-rust oil treatment, waterproof film wrapping and high-density foam shockproof protection. External reinforced wooden box avoids collision and moisture damage during international long-distance transportation. Supports sea freight, air freight and international express, suitable for global retail and bulk wholesale business.

Professional mechanic installation is recommended. Replace new gaskets and oil seals during installation to prevent leakage. After assembly, check oil circuit, fuel circuit and wiring tightness. New engine requires 500km break-in period; avoid full-load and long-time high-speed operation during break-in. Replace engine oil after break-in and clean filter elements regularly. Keep heat dissipation ribs clean to ensure optimal air cooling effect and extend engine lifespan.

Ideal for personal vehicle engine replacement and repair, motorcycle & ATV repair shop spare parts supply, bulk procurement, power upgrade modification and global powersports parts wholesale. Widely used in farm off-road work, outdoor exploration, daily commuting and street sport riding scenarios.

• Mature air-cooled structure, easy maintenance and strong environmental adaptability
• Dual-model compatibility for Grizzly 350 ATV and YZF600R sport bike
• OEM exact size, direct bolt-on installation without modification
• Stable power output, excellent torque and acceleration performance
• Wear-resistant and anti-vibration design, ultra-low failure rate
• Full complete assembly, ready to install and save matching cost
• Factory direct price with stable quality assurance
• Strict pre-shipment testing and reliable after-sales support