The challange. To build a Goped from scratch. But that`s not much of a challange is it? Most commercial Gopeds use a 22cc two-stroke engine that gives a top speed of about 20mph. Me and my brother decided to use a 38cc chainsaw and see what happened! |
The bare bones. Bought two of these scooters from the local junkyard for £5. UK. We had to reinforce the headstock with the front of a bicycle because it needed bearings to stop it collapsing under load. |
The first build up with a reduction of 2:1 We realised that a top speed of 370mph
was unobtainable due to the stress on the tyres and lack of aerodynamics! We constructed a lay-shaft. The gears were changed to run from the chainsaw clutch to the layshaft with a 10t running to a 21t giving a reduction of about 2:1. The layshaft then uses a 7t to a 36t giving a further 5:1 reduction. The result is a total of 10:1 overall reduction. And it works! I`ve clocked this at 35mph without full throttle. So, there you have it. The fastest handmade Goped I know of. Total cost including the brand new chainsaw.....£250 UK. |
Goped MK II. This one is still under construction but is designed to be more capable off-road! It uses an Oleo-Mac 38cc 2-stroke motor in a mono-shock chassis. The entire engine/wheel unit pivots on roller bearings in the swinging arm. |
FFinally finished. The Mono-shock Scooter. Great for off-roading and clocked on-road at a "realistic" 35mph ( with a lot of wobble and a burned out wheel bearing;-) |