Hi this is my scooter i had to make for a school project.
TAMI 5:1 reduction gearbox,
28 cc 2-Stroke Kawasaki engine
16" kids push scooter.
The rear sprocket is a 35 pitch, 35 tooth sprocket
Ratio one= 5:1
Ratio two= 35/10=3.5:1
It also has electronics components like a kill switch and brake light
Top speed so far is 45.2 and rising
find more pictures at http://slingshot.to/helmethead