The left side handlebar lever and cable is for the rear brake.
The reason that you can't get the bike in gear is because the idle speed is too fast, which engages the centrifugal clutch. Turn the idle speed screw down to about 1450 RPMs then try it. You'll probably have to adjust the pilot screw back where it belongs as well.
You'll need to read and follow directions in the service manual to work on that bike. Read the carburetor section and follow the reassembly step by step all of the way to the end, including cable adjustments. You can get a copy free, linked from the manuals forum here:
https://www.hondaatvforums.net/foru...nual-help/50817-service-manual-downloads.html
Let us know how it goes.
The reason that you can't get the bike in gear is because the idle speed is too fast, which engages the centrifugal clutch. Turn the idle speed screw down to about 1450 RPMs then try it. You'll probably have to adjust the pilot screw back where it belongs as well.
You'll need to read and follow directions in the service manual to work on that bike. Read the carburetor section and follow the reassembly step by step all of the way to the end, including cable adjustments. You can get a copy free, linked from the manuals forum here:
https://www.hondaatvforums.net/foru...nual-help/50817-service-manual-downloads.html
Let us know how it goes.