New here, first 212 build

Oh boy, you're in for a treat with that OCC. It won't hold up to a 212, hell you have to cut the seat tube(the only part of the bike holding it together) to fit one it. A 79cc predator barely , @michael whiteman has been building one with a 79cc. @DistantWolrld101 deals with them and he can tell you they are expensive and difficult to build. I started one for my old man, but didn't have the time to finish. I'm hoping to get it done soon, he wants something fun to go get mail with lol.
I’m thinking about listing the Sardar for sale on marketplace. Very lightweight frame good bike, but I’m not entirely sure how safe it would be add an engine with it being aluminum like that. The orange mongoose I was going to eventually put a 79 in or something. I could find close around that. The last picture is the engine that I got from my folks for free. I’m going to try to put that in the stingray.
 

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Oh boy, you're in for a treat with that OCC. It won't hold up to a 212, hell you have to cut the seat tube(the only part of the bike holding it together) to fit one it. A 79cc predator barely , @michael whiteman has been building one with a 79cc. @DistantWolrld101 deals with them and he can tell you they are expensive and difficult to build. I started one for my old man, but didn't have the time to finish. I'm hoping to get it done soon, he wants something fun to go get mail with lol.
I made a post in the project thread. I’m not sure if it’s findable. I just click on my profile thing. I posted the figure. I added that here as well just to make sure that the teachers I was listening to can give me feedback. Since I’ve gotten a real motorcycle, rebel 250. I can take my time with doing the stingray frame. And because of the other two bikes that are a project as well I’m taking on in a couple weeks. My main focus will be on those things mostly so I’ll have the patience, not be stupid with the bike frames.
 

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If you'll check out Damien rear wheel you'll see he has a rear disc thats larger than the rear sprocket. This is why I suggested the jackshaft on the seat post. Otherwise you could simply run a 10t\50t and get the same reduction but couldn't install a rear disc brake. You'd have to use either a rear drum brake or a rim brake.
I don’t know if you seen any other comments since I returned from my days of silence. I’m not gonna post those pictures again tired of digging through my phone. But I’m making sure to tag you in comment and reach back out so that I can continue getting good Suggestions and positive advice. I got a real motorcycle so that it to make a bike be a motorcycle isn’t there as much anymore. I made the post in project builds.
 
I don’t know if you seen any other comments since I returned from my days of silence. I’m not gonna post those pictures again tired of digging through my phone. But I’m making sure to tag you in comment and reach back out so that I can continue getting good Suggestions and positive advice. I got a real motorcycle so that it to make a bike be a motorcycle isn’t there as much anymore. I made the post in project builds.
For your OCC to be lower you need a 17" moped wheel for the front and a 16" scooter wheel for the rear.
 
I don’t know if you seen any other comments since I returned from my days of silence. I’m not gonna post those pictures again tired of digging through my phone. But I’m making sure to tag you in comment and reach back out so that I can continue getting good Suggestions and positive advice. I got a real motorcycle so that it to make a bike be a motorcycle isn’t there as much anymore. I made the post in project builds.
Ok took a better look at your pictures. To run that small rear sprocket and still get the torque converter to a 1\1 you're going to need that second reduction point.
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Since there's going to be a lot of torque going to the rear wheel you probably should strengthen the area where the stays connect to the dropouts.

When I had the LandRider (steel frame) the chain stay broke loose from the dropout. I filled in the dropout hole and welded in a piece of flat bar it never broke loose again.

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