Hey you guys I barely been using my bike I bought of Craigslist I love the thing to death but last night while I was cruising the pedal came off. I said no piggy when I get home I'll fix it. Just to find out that the crank shaft where the pedals go was stripped its the right one where the chain star is..... Can this be fixed ? Or do I have to change everything I'm scared of changing everything because I don't know if I can put back the motor please help