Garp
Member
Hi from Australia!
I had a yearning for a motorized bike since I was a kid but I couldn't find one that was fun in the mountains where you need low gearing most of the time. Eventually the idea became too strong and I set about making one.
The first version was cobbled together using stuff I had laying about. It was hopeless, the gearing was too high and the pedals had to be removed but the motor ran through the gears.
My next attempt was much better.
It can be pedalled normally with no resistance, if you pull start the motor it will idle until you open the throttle and the motor chimes in. I made it 100/1 reduction so 60 pedals pm=6000rpm at the motor in each gear. You can pedal with it, or freewheel and ride it like a little motorcycle, or a bit of both.
It can get up any hill and it does 40kph on the flat without pedalling.
All with only 31cc's of 4 stroke Honda.
It goes flat out for 2 hours or so on a litre of unleaded. It runs at any angle and it has a cooling fan built in.
I just stripped it down for the first time in 3 years of riding in the mountains. There was no noticeable wear so it must be right.
I also have a Shimano 4 spd auto hub to try soon.
It's a little overbuilt so I may try a 60cc Honda powerhead. I also would like to try electric as I think a set of gears would make a small motor a lot more usable.
I hope you like it, it's a lot of fun.
If you search "perrincycle" you can find a little movie of me riding it.
Cheers
I had a yearning for a motorized bike since I was a kid but I couldn't find one that was fun in the mountains where you need low gearing most of the time. Eventually the idea became too strong and I set about making one.
The first version was cobbled together using stuff I had laying about. It was hopeless, the gearing was too high and the pedals had to be removed but the motor ran through the gears.
My next attempt was much better.
It can be pedalled normally with no resistance, if you pull start the motor it will idle until you open the throttle and the motor chimes in. I made it 100/1 reduction so 60 pedals pm=6000rpm at the motor in each gear. You can pedal with it, or freewheel and ride it like a little motorcycle, or a bit of both.
It can get up any hill and it does 40kph on the flat without pedalling.
All with only 31cc's of 4 stroke Honda.
It goes flat out for 2 hours or so on a litre of unleaded. It runs at any angle and it has a cooling fan built in.
I just stripped it down for the first time in 3 years of riding in the mountains. There was no noticeable wear so it must be right.
I also have a Shimano 4 spd auto hub to try soon.
It's a little overbuilt so I may try a 60cc Honda powerhead. I also would like to try electric as I think a set of gears would make a small motor a lot more usable.
I hope you like it, it's a lot of fun.
If you search "perrincycle" you can find a little movie of me riding it.
Cheers
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Interesting--Very Interesting !!! 
