bzhwindtalker
100 kW
Hey all, I have a new project!
I start to feel some limits with pedals on my freeride bike and i'm tired of the noise of the transmission and the BB issues. I want a bike that is dead simple and I can crash a lot without breaking a derailleur or bending the BB. My goals are to make a 35kg max 5kw peak 750wh bike with 180mm of travel front and rear, with a geometry close to a trial bike but not quite as low. I will re-use my dirt mtb wheels, with a 3" tire in front and maybe a motorcycle tyre in the rear. I will make the frame with mild steel, 1,5mil thick. The frame will have a double downtube like my previous custom frame. I'm undecided yet for the seat, it could be either a bike saddle or a cutom fiberglass seat/rear muddguard. 14s lipo pack, and probably the blt 800 from goldenmotor with a 18fet on 100A peak. The Mac lawnmower motor could suit this project too. I would like to find a double wide GNG inruner, I like that motor but i don't think it will survive more than 40-50A peak. Any other motor that I should consider? The bike will be geared for 55kph, single stage of #219 chain (1/10 reduction ratio max).
I will try to finish this project before spring.
As for legality issues of making a motorcycle, I don't ride on the streets exepted for transitioning between zones and usualy riding on the campus so it should not be a problem.
I start to feel some limits with pedals on my freeride bike and i'm tired of the noise of the transmission and the BB issues. I want a bike that is dead simple and I can crash a lot without breaking a derailleur or bending the BB. My goals are to make a 35kg max 5kw peak 750wh bike with 180mm of travel front and rear, with a geometry close to a trial bike but not quite as low. I will re-use my dirt mtb wheels, with a 3" tire in front and maybe a motorcycle tyre in the rear. I will make the frame with mild steel, 1,5mil thick. The frame will have a double downtube like my previous custom frame. I'm undecided yet for the seat, it could be either a bike saddle or a cutom fiberglass seat/rear muddguard. 14s lipo pack, and probably the blt 800 from goldenmotor with a 18fet on 100A peak. The Mac lawnmower motor could suit this project too. I would like to find a double wide GNG inruner, I like that motor but i don't think it will survive more than 40-50A peak. Any other motor that I should consider? The bike will be geared for 55kph, single stage of #219 chain (1/10 reduction ratio max).
I will try to finish this project before spring.
As for legality issues of making a motorcycle, I don't ride on the streets exepted for transitioning between zones and usualy riding on the campus so it should not be a problem.