It was probably still working before the bike was stripped, but it's knackered and should be replaced.
You'd have to split the flywheels to replace the axle, then true the f/wheels up very accurately when reassembling. Not technically difficult if you have appropriate equipment and skills.
However, looking at the photos there's a lot of work, expense and hours needed and from my experience you'll find more work that needs doing (ought to be done) whilst the crankcase is split; bushes, bearings etc. and when reassembling the rest of the bike.
Before you strip th'engine check for wear in the main bearings (2 needed @ £25 each), timing side bush (£35 + reaming), and big end assy (circa £230). All plus shipping costs.
Unless you are very keen to locate the missing parts, frame etc. and dedicate a fair bit of time and money (possibly more than the 'finished' bike is worth) in order to use it it may be sensible to sell it as it is.
Sad, I know, but realistic.
One of this club's gurus, Don Madden, is in California.
So it sat in boxes until today. I plan on spending the next few days reading through this forum and deciding what I want to do with it. Best case scenario i find a frame and figure out where all the nuts and bolts go and restore the thing. Worst case its parted out, but that is my last resort.
