For ZX6.6 48P-76T Spur Gear - Kyosho LA375-76  [KY-LA375-76]

Product overview and purpose

The Kyosho LA375-76 spur gear is supplied as a replacement component with a 48P pitch and 76T tooth count for assemblies that use the ZX6.6 designation. It is meant to serve within the drivetrain, affecting mesh and gear ratios rather than acting as a standalone upgrade pack.

Confirm compatibility by matching the part designation to your gearbox or parts list; ZX6.6 references should be verified before purchase. Inspect the gear for concentricity and tooth integrity before installing, and ensure pairing with a compatible 48P pinion to reduce wear risk.

Installation guidance: remove the transmission cover, verify the 48P pinion and spur pairing, adjust motor mount or pinion spacing to achieve the correct mesh, and refit the original retaining hardware. Carry out a low-speed run-in to check for binding, noise, or irregular engagement.

Tuning considerations: the 76T tooth count changes the driven ratio to enhance torque at the wheels while lowering top speed. After changing spur size, revisit slipper and differential settings to keep handling predictable and protect drivetrain components.

Store spare spur gears and replace any unit showing chipped or uneven teeth to maintain consistent gear engagement and prevent damage to pinion gears and bearings.