chain tension

[zorrindrax]

is it really necessary to use chain tensioner with the 49cc 142f engine?

 

[Old Busted Hotness]

The tensioner is mostly there to compensate for chain length. An ideal setup would have no tensioner and 1/2 inch of slack in the chain. If you can place your engine to make that happen, do it. Chances are, you can't. So you need a tensioner.

 

[Will'smotobikes19]

A better chain would take more time to get loose if you try a DID or Regina chain #415 it will take longer for it to stretch. If you do use a tensioner make sure alignment is good and use a 4 bolt tensioner.