I have been thinking about this one a while, I think it will work, but I thought I should get some opinions before proceding. I am thinking I will use a slipper belt clutch on the V belt and add a spring loaded tensioner to the serpentine belt.
Will this work?
- Thread starter streetstrip80
- Start date
i never did a belt drive bike, but using the same size rim might be a bit of a problem. like cornering with a low tire might make some sparks.
also, when the belt's disengaged, depending on how loose it is, it might hit the ground.
the gear ratio with the bigger rim might be a problem, too.
these are all things i'm just mentioning from a design point of view. i'm sure someone else can offer some more insight and experience than me...
also, when the belt's disengaged, depending on how loose it is, it might hit the ground.
the gear ratio with the bigger rim might be a problem, too.
these are all things i'm just mentioning from a design point of view. i'm sure someone else can offer some more insight and experience than me...
Build a Motorized Bike Plans this might help you with your build. It is similar to what you are doing. It looks like they are using nice fat balloon tires though. Good luck and keep us informed 
-LS
-LS
I Think it will work
I have most of the mechanicals worked out just working on asthetics now
I was thinking in frame tank
but, now I am thinking I will keep the open space and put the tank under the seat
I have most of the mechanicals worked out just working on asthetics now
I was thinking in frame tank
but, now I am thinking I will keep the open space and put the tank under the seat
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I have a couple belt drives and Bairdco is right about the gear ratio, but you can compensate with gearing on the jack shaft and motor pulley. You should be OK after some testing, about 30 MPH will be top speed. Have fun.
Only problems I had were mud and snow getting packed in the belt. Otherwise it works great. Almost as dependable as friction drive.
It works!
Did some short test rides today with the bike as pictured here
Everything worked well, even with the clutch held on with a bunjee cord
spent a little time working on a proper clutch lever and cover
Did some short test rides today with the bike as pictured here
Everything worked well, even with the clutch held on with a bunjee cord
spent a little time working on a proper clutch lever and cover
Got the bike mostly complete. It works well, but will need a few adjustments as I test it more.
The gearing turned out just right. Pulls from a start with no pedaling, and goes as fast as I want to go (Have not checked speed with GPS yet, but I am guessing it goes about 35 mph)
If it runs for a while with the drive disenguaged, the belt warms up and starts to pull a little bit. I may eventually put a centrifugal clutch on it. I built it with the slipper belt because the motor has a 7/8" shaft, and clutches that size are expensive.
I spent years collecting parts for this build, but the only thing I paid for was a$5 v-belt.
One thing I learned that could help others building belt drives is that Ford alternator pulleys have the same ID as the OD of common bicycle axle bearing cones (I think its 17mm). This facilitates making jackshafts out of common parts.
The gearing turned out just right. Pulls from a start with no pedaling, and goes as fast as I want to go (Have not checked speed with GPS yet, but I am guessing it goes about 35 mph)
If it runs for a while with the drive disenguaged, the belt warms up and starts to pull a little bit. I may eventually put a centrifugal clutch on it. I built it with the slipper belt because the motor has a 7/8" shaft, and clutches that size are expensive.
I spent years collecting parts for this build, but the only thing I paid for was a$5 v-belt.
One thing I learned that could help others building belt drives is that Ford alternator pulleys have the same ID as the OD of common bicycle axle bearing cones (I think its 17mm). This facilitates making jackshafts out of common parts.
Don't know exact size (thats my story and I'm stickin to it) Probably just over 100 cc
Pulls up hills fine if you keep the revs up
GPS read 38.8 MPH (don't tell the cops)
