Question about Chain Drive

[Unsolved Rubix]

My cousin comes back in town next week and he has lots of tools to help me with my Bike and I was wondering how good of an idea is it to have a chain drive that is a push start?

 

[deacon]

all the china bikes mostly are drag start if that is what you mean. They work just fine.

 

[Unsolved Rubix]

all the china bikes mostly are drag start if that is what you mean. They work just fine.

Yea, that is what I meant, My only question is what if there isn't a clutch?

What are good ways to make a clutch?

 

[Bikeguy Joe]

Make a clutch with a belt drive and spring loaded tensioner.

 

[Unsolved Rubix]

Ok, My first goal this week will be to get that busted bolt out of the motor

 

[deacon]

I have no experience with chain drive except the china girl kit which has a clutch.

 

[Unsolved Rubix]

I have no experience with chain drive except the china girl kit which has a clutch.

This is a 21cc motor I hope it has proper power.

 

[Bikeguy Joe]

You should get about 15-20 mph out of it.

 

[Unsolved Rubix]

What kind of gearing ratio I should go with?

 

[deacon]

I think you would be better off with friction drive with so small an engine. I have no particular reason for saying that just seems it would be easier all around.

 

[Bikeguy Joe]

A friction drive would allow easier gearing changes....by changing the roller. I have no idea where to start as far as gearing...I sold my Spitz awhile back so I can't check it for you.

 

[Unsolved Rubix]

I think you would be better off with friction drive with so small an engine. I have no particular reason for saying that just seems it would be easier all around.

Yea, well I may have a 33cc coming my way soon. I think I am working things out to make it a belt drive instead.