i need help with a jackshaft set up

[duramaxer]

i am gonna need some help with a jack shaft set up so if any one can give me some pointers on how to make one and how to gear it i only have the stock front and rear sprockets for the 1985 suzuki lt 185 i know its a 520 chain any help will help

 

[duramaxer]

any one have any pointers ?

 

[big steve]

Post some pictures of what you have so far. that will most likely help people help you.

 

[AceEngineer]

A shaft with 2 sprockets mounted between two bearings located where you can align the sprockets to the engine and axle sprocket. As far as the gearing, mount the motorcycle driven sprocket on the axle, leave the drive sprocket on the motor. Now, as long as the two sprockets on the jackshaft are the same, the overall gear ratio will remain the same as the bike was. Choose something in between the two existing sizes that will fit easily. 520 chain is dimensionally the same as #50 roller chain except for the width. 520 is 1/4 inch wide between side plates and #50 chain is 3/8 inch (equivalent to 530 chain). #50 sprockets will be infinitely easier to find. Use #50 chain or have the #50 sprockets turned to 1/4 inch thick and use the 520 chain.

 

[qtband]

If you use 50 chain sprockets. you can use a grinder (if you're careful) to narrow the teeth. Pretty easy actually.