Oddball Matt
Member
Hey guys n gals just found this place and decided to join in to hopefully learn a thing or two about these builds. New to motorized bicycles as I only recently discovered they are in fact legal here provided a certain set of rules are followed (<50cc, <1kw, <25km/h) but NOT new to wrenching having built several motorbikes and regularily wrenching on both bikes and cars. Got the basic garage setup: grinder, welder, vise and a bad attitude but unfortunately have no access to a machine shop so all fabricating will need to be made by hand.
Currently working on a mid- seventies 24" Jupiter drop bar roadbike that, when I`m done, will be a fully converted board track racer. Currently fabricating a self made springer front suspension on it, after that`s done and dusted gonna start thinking about the powerplant. I have an old kids ATV engine with a cracked tranny casing due to a snapped chain which I might cut in two and just use the motor part, or if funds permit might order one of those conversion kits, four stroke if at all possible.
One thing I`m hoping to find from this forum is a way to DIY a some sort of an engine governor or a rev limiter because the law here says any motor assisted bicycle has to actively DROP the assist off at 25km/h, it`s not enough to gear it so that when on flat it just won`t go faster it has to STOP assisting at that speed or I`ll quickly find myself in a big pile of trouble if the brass ever sees fit to perform a thorough on the road inspection and trust me when they`re gonna see the finished product whizzing down a bicycle lane many a blue light is going to start flashing as these things (petrol engine) are NOT common here at all!
So there, hope I didn`t bore you too much!
Currently working on a mid- seventies 24" Jupiter drop bar roadbike that, when I`m done, will be a fully converted board track racer. Currently fabricating a self made springer front suspension on it, after that`s done and dusted gonna start thinking about the powerplant. I have an old kids ATV engine with a cracked tranny casing due to a snapped chain which I might cut in two and just use the motor part, or if funds permit might order one of those conversion kits, four stroke if at all possible.
One thing I`m hoping to find from this forum is a way to DIY a some sort of an engine governor or a rev limiter because the law here says any motor assisted bicycle has to actively DROP the assist off at 25km/h, it`s not enough to gear it so that when on flat it just won`t go faster it has to STOP assisting at that speed or I`ll quickly find myself in a big pile of trouble if the brass ever sees fit to perform a thorough on the road inspection and trust me when they`re gonna see the finished product whizzing down a bicycle lane many a blue light is going to start flashing as these things (petrol engine) are NOT common here at all!
So there, hope I didn`t bore you too much!
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