GY6 150 chinese scooter gear change for more top speed.

How I changed the final drive ratio on a Chinese GY6 150cc scooter to get a little more speed. End of video shows how I heated and shrunk the gear on to the new pinion with toaster oven. Shows the gear-set and gearbox. NOTE: While the video states gearset was purchased from Scrappydog Scooters, it seems they are now out of business for shady business practices. This gearset was manufactured in Taiwan. This job can be done without removing the entire engine, but you will need to remove the rear wheel to get the final drive shaft out. If you think this video might help you, please subscribe to see all of my other videos. Just go to my channel and click on "videos". Yes, I now get 60mph from my 150cc scooter.