COOL! I am not an expert on production numbers (
c'mon on down Skull!) but AFAIK, the 3000cc marking indicates that it is indeed a very early production engine and likely the engine number matches the frame.
The fact that the kicker moves is
good - sorting it out if it is locked can certainly be done, but it is a PITA. The fact that the alternator nut turns...a little ...is
excellent. Just keep putting lubricants down the spark plug holes and gently working that nut back and forth. You don't want to bust anything, just persuade it to wake up. I would keep trying the
Fred Flintstone shuffle on the garage floor (forwards and backwards) - that usually works well.
My guess is that there is a bunch of old engine oil and fuel in the cylinders and it has turned to a sticky goo over the years. Anyhow, I suspect that pretty soon, you'll have a free engine there - but as Gary said - DON'T try to start it just yet. Just leave the plugs out until you have checked all four valves (under the oddly shaped chrome covers on the cylinder head) - and made sure that everything really IS moving.
NEXT STEPS:
- have a look in the fuel tank and see if it is rusty if it is, it can be cleaned and re-sealed as long as the rust isn't too bad.
- drain whatever is in the engine and replace it with fresh clean 10W40 oil - but do not use anything marked "Energy Conserving".
NOTE: there are
2 engine oil drain plugs on the XS650. These are big-headed bolts on the bottom of the engine (there are lots of nuts and bolts under there but nothing approaching the size of the drain plugs). One drain plug is more or less under the crank shaft in the middle of a rectangular plate that is held on by six smaller bolts. This is the sump plate -
about which more later - and the other drain plug is further back under the transmission - but it looks exactly the same (and in fact, it
is exactly the same) as the front one.
These oil drain bolts can be
very tight so be sure that the bike secured or a buddy is holding it before you try reefing on them. It would be tragic if that valuable old bike fell over on you - and it got damaged in the process.
I would rate your thread as:
Cheers,
Pete