My 1st 80cc Fat tire Evo

Hello , all I'm new to the forum. I'm looking to get my chain to clear the rear tire with is 4.0 big. Ive been doing my own research and came up with the BikeBerry Sprocket Adapter as an option . Firstly how do I figure out of I need the 1.0 or the 1.5 hub also will this item work. Or is there any cheaper alternatives. Here are a few pics I'll post more if needed.
 

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Welcome djat,
Just a note, there is no such thing as an 80cc, it's a 66cc for accurate future reference ;-}
I'm looking to get my chain to clear the rear tire with is 4.0 big.
Unfortunately just moving your rear sprocket out won't do it.
That 415 chain has to be in alignment.

Your engine sprocket is inside the tires width mounted to the seat post, ~2.25" tires is all it can get by.

That means either also making an offset 2-stroke engine mount for front and rear, use a different system like a friction drive, or just 'jackshafting' your engine output to the right hand side and using the pedal system to drive the wheel.

SickBikeParts has a 2-stroke JS kit that works well for $200.
http://www.sickbikeparts.com/catalo...ducts_id=86&osCsid=rg0jf2im21ou0prpq2sfsuihc2

You mount the engine to the JS base, then mount the unit to the bike, and then change out your bottom bracket pedal system that will share the pedal drive with the engine and not beats your legs off.

Read the install instructions as it's complicated and may be above your skill/tools level but what I use for everything with over 2.25" tires like this one.

No extra back wheel sprocket, the engine goes to shaft.

FitoDone2L.jpg


Then, you use the pedal side which is already wide enough to clear your fat tire on the right.

FitoDone2R.jpg


Bummer you have no rear wheel gears you could use with it as well, but it's better than trying to go the other way as you want your engine secure to the frame.
 
Thanks for all the help I should receive the adapter next week and my universal mounts , also I tried out the cnc machined mount with no luck , it hits the muffler , anybody run into this?
 
You are still trying to go direct drive on the left?
Well, you were warned it wouldn't work, but hey spend away.
 
OK after , trying universal mounts and traditional mounts , the chain didn't clear as I was warned ABOVE. After tinkering around more I finally got her running!!!. I added a 1.5 sprocket adapter(gasbike.net), bent my coaster arm several times to get it right.Plus a occ chopper mount(gasbike.net), That did the trick. The chain clears the tire , I test rode it to work, posting pics when I get home.
 
OK after trying universal mounts and traditional mounts , the chain didn't clear as I was warned ABOVE.
After tinkering around more I finally got her running!!!.
I added a 1.5 sprocket adapter(gasbike.net), bent my coaster arm several times to get it right.Plus a occ chopper mount(gasbike.net), That did the trick.
The chain clears the tire , I test rode it to work.

So you moved the whole engine left.
That will work if stays in place, good for you!

Have you done the shove test?
Hold your top bar with one hand, your engine head with the other, and shove the engine back and forth as hard as you can.
If it moves AT ALL, that is a fail.

I am not sure what your final pic is...
One pic has your carb at ~45 degree angle, that will always be a problem.
You will know when it won't start, and the reason will be because the float can't shut off fuel and it will run straight through and pool in the bottom of your engine.

And it looks like your tensioner is on the top (power) side, they are only designed to take up slack on the bottom (return) side.
When that fails it's going to really ruin your day, that is assuming it hasn't already been ruined because you couldn't stop that heavy bike with just that wimpy coaster brake and crash.

Sorry to rain on your parade as you really put a lot of effort into a loosing battle.
In short I suggest you check your medical coverage and ride in full body armor as I wouldn't ride that death trap around the block no matter how 'cool' it looks because I know first hand how 'un-cool' it is to wreck by going faster than brakes, which in your case is about 10mph.
 
Thank you taking everything into consideration , as of now the bike rides welll. I'll keep u posted.
 
OK after , trying universal mounts and traditional mounts , the chain didn't clear as I was warned ABOVE. After tinkering around more I finally got her running!!!. I added a 1.5 sprocket adapter(gasbike.net), bent my coaster arm several times to get it right.Plus a occ chopper mount(gasbike.net), That did the trick. The chain clears the tire , I test rode it to work, posting pics when I get home.
Hey! How did you get the coaster brake arm on the hub with the rear sprocket mounted???
 
Hey! How did you get the coaster brake arm on the hub with the rear sprocket mounted???
It's been over 5 months since a reply, I think you can figure whatever he tried didn't work.
I tried to warn him, I just hope he's not hurt.
 
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