I know that its near impossible to know for sure without first knowing about that second motor and what all is wrong with my current one but any idea what I would be looking at price wise for the whole overhaul?

And honestly since u guys have functional bikes do u think that they are worth the time and cash that I will be putting into this motor?

The current manual that I'm rocking is the one that I downloaded off this site. Clymer or something along those lines, is there a different one that I should get ahold of?