1978 yellow Honda Express problem?

I recently bought my 1978 Honda express and when I bought it it was working just fine but began to have problems. When I start my Honda on its kickstand the back tire will begin to start spinning fast as hell and I have to hold the back break to stop the tire but as soon as i let go it will start up again. But that's not the real problem. When I try to accelerate the throttle it begins to make a low noise and ends up dying off.

Either your clutch needs adjustment or you may need a new one

Worn engine.
Check the cylinder compression.
Clogged muffler.
Remove the pipe and blow into the rear.
There should be no resistance if the pipe is not clogged.

Possible stuck clutch #2
The parts get rusty with age.
http://www.partsfish.com/oemparts/a/hon/506b7dc7f8700219807ad6f6/clutch-drive-chain

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