REAR SPROCKET STEEL 39 [JTR301/210.39] 520, DOUBLE DRILLED JTR301, JTR210, L17-0239, MX-80339

Dirt Racing Rear Drive Sprocket

This high-quality rear drive sprocket is designed for optimal performance and durability. Constructed from C45 high-carbon steel, it undergoes a heat-treatment and sandblasting process to reduce surface tension, ensuring longevity. The sprocket features a dual-fitment mounting pattern, accommodating both countersunk (8.5 mm) and plain (10.5 mm) bolt types, and is available in either a protective black powder coat or a bright zinc plating finish for corrosion resistance. It meets or exceeds motorcycle industry compound standards and serves as a direct OEM replacement part.

Key Features:

• Material: Crafted from C45 high-carbon steel for superior strength.
• Durability: Heat-treated and sandblasted for enhanced toughness and reduced surface tension.
• Versatile Mounting: Features a dual bolt pattern with both countersunk (8.5 mm) and plain (10.5 mm) options.
• Protective Finish: Available in black powder-coated or silver bright zinc plating for excellent corrosion resistance.
• Industry Standards: Meets or exceeds motorcycle industry compound standards.
• Direct Replacement: Designed as a direct OEM replacement for a seamless fit.

Specifications:

• Tooth Count: 39
• Chain Size Compatibility: 520
• Mounting Type: Dual fitment (CSK 8.5 mm and CTB 10.5 mm)

Cross-Reference Part Numbers:

• JTR301.39
• JTR210.39