front engine front wheel drive question

[MotorBicycleRacing]

Right now the motor is set up with a drive wheel. I don't plan on using a gearbox or a jackshaft all of the ideas I'm working on drive directly from the motor to either friction, chain, or belt drive. The weedeater engine came with a clutch ( most of the better models do) which will all me to set it up this way.

Friction will work on any size wheel with no gearing problems

Have you calculated your gearing for chain or belt drive?

GEBE belt drive works driving directly from a motor like yours
because the drive ring is about 17" in diameter and the clutch
sprocket is very small

What size chain sprockets do you plan on using?

 

[HoughMade]

I don't think you are going to get this to work with chain drive without gear reduction. I'm thinking that friction is the order of the day for you.

 

[rkbonds]

I haven't calculated the ratio's with the chain drive. I figured I'd use trial and error I have 3 different sizes for the drive gear and 8 or 9 for the wheel and they shouldn't be too time consuming to change out ( I hope ). Now if I end up doing the belt drive I only have one size ring for the wheel and I don't have a drive pulley yet so..... unsure on that right now. I also have 2 different size drive rollers for the friction drive. I figure I'll use the friction drive to find out where I think I need to be as far a gearing. Especially considering I only plan on using the motor for cruising take off's and up hill's will be all pedal power. I'm not so much concerned about top speed or low end grunt just a good midrange is what I'm looking for.

HoughMade I take that as a challenge I enjoy that.... tells me I'm gonna have to work extra hard to make the chain drive work. All in good fun we'll have to see how everything works out in the end project.

What I'm having the biggest issue with right now is the mounting. Can't figure out the best way to set it up.

 

[MotorBicycleRacing]

I haven't calculated the ratio's with the chain drive. I figured I'd use trial and error I have 3 different sizes for the drive gear and 8 or 9 for the wheel and they shouldn't be too time consuming to change out ( I hope ). Now if I end up doing the belt drive I only have one size ring for the wheel and I don't have a drive pulley yet so..... unsure on that right now.

what size wheel ring do you have for belt drive?

What kind of belt are you going to use?

 

[rkbonds]

It's a 20" ring not sure on belt's haven't gotten that far yet. I was thinking about either an automotive type v belt or a lawnmower industrial type to start with.


Opps I just realized I didn't say what size bike I'm using.... it's a 26".

 

[MotorBicycleRacing]

It's a 20" ring not sure on belt's haven't gotten that far yet. I was thinking about either an automotive type v belt or a lawnmower industrial type to start with.
Opps I just realized I didn't say what size bike I'm using.... it's a 26".

Its like pulling teeth with you..... 64 questions
you have a camera, take some pics of the parts

Is it a whizzer sheave? you can use a 1/2" / 4L belt V belt
how does it attach to the wheel?

If so that will work gearing wise for the belt drive and has
been done before

This is a GEBE front wheel drive
http://www.motoredbikes.com/showthread.php?t=5229

however unless you have sprockets for the chain drive
that are very large it isn't going to work gearing wise

trial and error???
Easier to calculate it first.....

 

[rkbonds]

What's a whizzer sheave? I'm doing all my stuff on the cheap. So far I have $00000 invested in my project. So all of the details haven't been worked out yet. All of the sprockets I have I pulled from other bikes and the drive gear I got off a pocketbike. The ring, I found not sure what it came off of or exactly how it will attach yet. So I'm up for any ideas you have to share on what you think might work better I'll try and get a pic of the engine as I have it set up now ( not mounted ) and post them soon.

 

[rkbonds]

Here are some pics I managed to take today. I did manage to get the motor half way mounted today. I got the uprights fabbed up and mounted, still have to fab up a side to side mount, front to back, and a tensioner. Seems to be good so far. Hope to get it finished up tomorrow and take it for a test ride.

 

[s_beaudry]

Very nice work you have so far....

 

[rkbonds]

I did some more work today and was able to take it for a ride . I've got to go get an actual adjustable tensioner tomorrow. I used a ratchet strap today for the test not the best idea I know but, it worked. I was bogging down pretty bad never reached high rpm's, not sure if that's related to tension or drive wheel size but, will have a better idea after I install the tensioner. I will say that other than that little problem I was very pleased with the ride and power. I'll post more pics after mounting the tensioner.