Here's the advice. If you run it without a tensioner, you will need some kind of axle puller/tensioners like what is found on BMX bikes, or you may get "axle creep".
If you want to do without a tensioner or roller, you will do best with a dedicated hub instead of the rubber sprocket holders.
Some frames don't have clearance and you will have chain slap or chain rub on the left chain stay.
Can I have your Roller tensioner? I like them, but I suggest welding them to the frame if you have narrow chain stays.
See my profile on motoredbikes.com for a chain tensioner I made from a go cart part, looks factory made.
Originally Posted by meowy84
Putting my kit together and thinking of omitting the tensioner. I see bikes with and without one.
Personally I'm looking for a simple look and I think they tend to make the bike look more clattered and also the more components the more chances of it loosening and getting into the spokes. Since I have a chain breaker and my frame has some room for adjusting the back rim I should be able to eliminate most of the slack in the chain.
Just looking for some opinions from the motorized bicycle gurus. Pros and cons.