Whitz Racing - Yokomo YZ-4 SF2 - HyperGlide Ceramic Bearings - Full Kit HPI115967 9 is the 3-speed gearbox

9 is the 3-speed gearbox

With many revolutionary features incorporated into her design

Multiprop channels have the following differences from normal linear channels: The resolution of the multiprop channel is lower than that of the linear channel

Thus was born the 727

durable EPP foam construction

Whitz Racing - Yokomo YZ-4 SF2 - HyperGlide Ceramic Bearings - Full Kit HPI115967 9 is the 3-speed gearboxHigh Performance Hybrid Ceramic Bearings Whitz Racing recommends every few track days to check for any necessary maintenance needs. If the bearings feel gritty or have reduced roll, remove bearings and clean with a citrus based degreaser & lightly oil with a premium high temperature lube oil like their TDK Bearing Oil. Car brake parts cleaner will ruin your bearings and is NOT recommended. Compatibility: Yokomo YZ 4 SF2 *Whitz "Full Kits" DO NOT