Transmission Gear Set For 50cc 110cc 125cc GY6 Engine Pit Dirt Bike

As a DIY builder of go karts and custom motorized bikes I was astonished to find this four speed gear set by Goofit for just 25 bucks. While building your own transmission may not be up everybody's alley (requires a basic understanding of how transmissions work as well as some mechanical and welding skills to build the transmission case and shifter mechanism) this gear set is really all you need (except for four good bearings) for the internal componenets to build a shifter cart or scooter transmission. There are some very helpful videos on the web (search "diy 4 speed gearbox") to show you the basic steps and the skills/tools required to tackle the project. As shown in the photos, mine is not completed yet but I'm having great fun with it so far and I'm far enough along that I am certain it will function well in the shifter cart I am putting it in. This is the same gearset found on many pit bikes and pocket rockets so it is built to take a good deal of abuse. This is a real bargain for the DIY builder willing to put in the time and effort to build the case and the shifter. I'd give it even more stars if I could.

These are made better then the oem ones on my 2024 syx moto 125cc pit bike. Yes it is a Chinese pit bike so if you have this bike or something close to it with bad transmission gear I highly recommend these