My first Build, Picture!

Way to go. It just good to see someone do a lot with just a little. I think that will be about the best 90 bucks you will ever spend. Have fun, and let everybody know it.

Yeah that is scary! Best to drill a 1/8" hole through the tensioner and into the frame just to go through one side of the tube, and then tap a 1/8" roll pin in the hole to clock it so it can't spin out.

Congratulations on your first build Mr Black. Sorry you took a spill but glad you are ok. You cannot look these bikes over too much. Since I'm probably at least 3x older than you and know that I don't heal up as quickly I pre-flight my bike each time I get on it. Spend some time looking at some of the solutions these guys have come up with for the tensioner. You'll find something that will work for you.
Good Luck, Dan

Well done. Glad you tucked in those cables. These new builds can have cables dangling like kudzu until you find time to adjust the length and tuck them it. My throttle cable was way too long on my first build so I looped it around my top tube until I found time to trim it.

Glad you're not too hurt!

Try to eliminate the tensioner- sometimes a smaller sprocket will give you more clearance- as well as a btter cruise without opening the throttle. You may not be able to on a mountain bike frame though-

But this isn't by any means the first time I've heard this scenario involving the tensioner- so on my two cruiser builds- I've never used one

saves all kind of weight too- I used to have to wheel my bikes up a flight of stairs, so I built them light

also- I'd recommend a 415 chain- not sure what you mean by 41 chain- a 410?
anyway- the 415 is harder to work with as far as cutting it, but it gives more tolerance to any misallignment problems -

I use a 415 Industrial/Trike chain- which is the same width as standard 415 but with shorter verticle plates- much lighter and rolls much smoother- you can hear the difference too. Search it here or on the net- about $12 delivered

If you can- post a picture of your motor and sprocket allignment- taken from right behind the back sprocket- and we can see better if you can skip the tensioner.

I feel that I am obligated to advise you Do Not Drill A Hole In Your Frame. Bike frames are not thick enough to mess with.

Buy a six pack of cold beer and go to the nearest muffler shop at closing time and have them weld that tensioner clamp to the frame. There will be a fight over who gets to do it for you.

my two cents,

Happy riding, Chaz

good idea , agreed