Motorcycles, Snowmobiles, Go-Carts, ATV's and Golf Carts - Weed Wacker Powered Bike
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Max_Weisen
09-17-08, 10:15 PM
So I am looking at an easy way to convert a bike to a weed whacker engine powered bike. Does anyone have any advice or how to links about making one of these. I really need the help.
Thanks,
Max
Thanks,
Max
marbobj
09-18-08, 04:53 AM
The easiest way to do it that I have seen (and I'm not saying this is the best) was to put a drive wheel on the wacker engine and run that drive wheel against the rear tire. I believe the mounting for the engine let it pivot off and on the tire to allowing clutching the drive.
That setup would get rid of things like drive chains and belts, but you wouldn't have gearing on it. But since it's supplemental power and the wacker engine has such a wide range of rpms that probably wouldn't be significant anyway.
That setup would get rid of things like drive chains and belts, but you wouldn't have gearing on it. But since it's supplemental power and the wacker engine has such a wide range of rpms that probably wouldn't be significant anyway.
Pilot Dane
09-18-08, 05:51 AM
If you retained the centrifugal clutch which is probably inside the power head housing with the engine you would have a built-in neutral that would let the engine idle even with the drive wheel against your bike's rear wheel. You would still want a mechanism to raise the engines' drive wheel off your bikes wheel since it would probably create a lot of drag when it was not being used.
The engine drive "wheel" should probably be very small diameter and look more like a axel or shaft with knurling; as opposed to an actual wheel. Your motor has low torque and high rpm's so you want the small wheel to provide a reduction. The smaller diamteter your drive wheel the more reduction.
The engine drive "wheel" should probably be very small diameter and look more like a axel or shaft with knurling; as opposed to an actual wheel. Your motor has low torque and high rpm's so you want the small wheel to provide a reduction. The smaller diamteter your drive wheel the more reduction.
the_tow_guy
09-18-08, 05:58 AM
You might search the archives here; there was a pretty lengthy discussion on the matter a while back.
marbobj
09-18-08, 03:08 PM
I'm not an expert on that particular setup, but you have to appreciate how they got it to work. The wacker engine, even with the reduction that Pilot is talking about has to have a certain level of rpms to do anything because of its torque curve. Then that rpm range, where the engine works well has to be matched to the surface speed of the tire at a certain ground speed of the bike.
The supplemental power application of the wacker engine would be very ground speed specific - at least to a given range of speed.
I can see where that would take some figuring.
When you get that thing put together let us know what you came up with and how it's working.
The supplemental power application of the wacker engine would be very ground speed specific - at least to a given range of speed.
I can see where that would take some figuring.
When you get that thing put together let us know what you came up with and how it's working.