Dig in, it's loads of fun
OK, sounds like your big bolt in the center
(17mm) is loose or missing, or the threads
in the crank are stripped out
Give it a go, don't be afriad of the timing, we
can help you get it all back together, it's not
hard to set. Start with the crank halfmoon key
at 12'O clock, check the cam position, notch
should point down on an 8V, pin in the cam
should be at the 12'O clock position too.
It's easier to remove the radiator to do this,
but it's your choice, it can be done with it in,
but if you need to use an impact (recomended)
you will need it out.