Kyosho RB6.6 SP Idler 40T RC Gear - UM737

The Kyosho UM737 is a 40-tooth idler gear designed as a direct-fit replacement part for the Kyosho RB6.6 SP competition off-road buggy. The idler gear sits within the drivetrain, transferring power between the gears in the transmission, and is a key component to keep the RB6.6 SP running smoothly. Sourced directly from Kyosho under part number KYOUM737, this is an OEM-spec spare that restores the drivetrain to factory condition when the original gear wears or strips.

Key Features

• 40-tooth idler gear machined to Kyosho OEM specification for the RB6.6 SP
• Direct replacement for a worn or damaged idler gear in the RB6.6 SP transmission
• OEM part sourced from Kyosho, ensuring correct tooth count, pitch, and fitment
• Essential drivetrain spare for competitive RB6.6 SP racers who run hard and need quick turnaround between heats

Compatible With

• Kyosho RB6.6 SP Off-Road Competition Buggy

What's Included

• 1x Kyosho UM737 40-tooth idler gear