This is my first build, 20miles on it so far, tested up to a ~34mph speed. Nothing fell off in the attempt 
It looks like the sweet spot is around 25-27mph, little vibration, good power delivery.
The frame is a 1982 Murray Baja mountain bike, the front wheel is original but the rear one is brand new as the spokes where to thin for the load. Brakes need to be replaced asap as they are very weak! The frame is bare so that it will be easy to clean and if/when rust shows up.
The rear sprocket was easy to install and the chain doesn't come of, so that should be fine. The tensioner however tends to slide down, so I added a spacer to keep it in position. I think I'm going to change it soon with a 11thoot sprocket.
The kit did not come with the proper mount for the throttle so I had to adapt one. The metal could not be too thick because of the top screw that it attached too, so the best thing I had at hand was a spoon... it works well with little flex. I also added two springs to the throttle (one compressing the cable and one pulling the black plastic butterfly actuator.
The muffler did not have the proper attachment so I left the factory muffler and I modified it to spit rearward. It's light, definitely not too noisy but I don't know if power delivery can be improved with the longer muffler.
In the transmission I added ~50mL of 80W shaft drive oil (this transmission should be in essence like a shaft drive, isn't?) but I have read that a thicker oil is better.
Any advice? See any problem with the current set up?
Thanks, David
It looks like the sweet spot is around 25-27mph, little vibration, good power delivery. The frame is a 1982 Murray Baja mountain bike, the front wheel is original but the rear one is brand new as the spokes where to thin for the load. Brakes need to be replaced asap as they are very weak! The frame is bare so that it will be easy to clean and if/when rust shows up.
The rear sprocket was easy to install and the chain doesn't come of, so that should be fine. The tensioner however tends to slide down, so I added a spacer to keep it in position. I think I'm going to change it soon with a 11thoot sprocket.
The kit did not come with the proper mount for the throttle so I had to adapt one. The metal could not be too thick because of the top screw that it attached too, so the best thing I had at hand was a spoon... it works well with little flex. I also added two springs to the throttle (one compressing the cable and one pulling the black plastic butterfly actuator.
The muffler did not have the proper attachment so I left the factory muffler and I modified it to spit rearward. It's light, definitely not too noisy but I don't know if power delivery can be improved with the longer muffler.
In the transmission I added ~50mL of 80W shaft drive oil (this transmission should be in essence like a shaft drive, isn't?) but I have read that a thicker oil is better.
Any advice? See any problem with the current set up?
Thanks, David
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