hi all i just bought my first moped, motobecane 50v, tried to get her to fire but it would barely jump when i was turning it over with a drill and some starting fluid. new spark plug, adjusted points but it only have spark when it wants to. (i think i has a bad ignition coil). checked compression and it seems rather low a bit less than 90 psi. I've done some research and poking around on the bike and those seem like the 2 areas that need attention, nothing on this bike looks like its been touched all stock. and yes its missing the chain guards :(
Questions for the moped Wizards-
1. What do i do to increase the compression?
2. Could something else be causing my intermittent spark?
3. I'm getting a SHA carb because I've already seen so many complaints on the stock one anything a noob should lookout for messing with this bike?