by davegsm82 » Thu Oct 24, 2013 5:36 am
Essentially the same engine as my 301 and 251. Fortunately it's probably one of the easier jobs, however you will have to remove the clutch retaining nut, this may or may not be an issue if you've done it before. Thin rope down the plug'ole will lock the engine good enough to remove or re-fit the nut. It is usually all done with the engine in the frame unless there's any other reason to take it out, it's actually easier to have the engine supported.
Just remove the oil hoses and oil pump cable (if present), Tacho drive (3 bolts), Clutch cable, clutch nut, Gearchange lever, 5 cover retaining bolts. **Dont undo the kickstart bolt**
The cover will simply pull away from the engine, if you are careful you might be able to save the gasket, sometimes it rips and you will need a new one.
The kickstart gears come away with the cover, inspect them, the ratchet teeth will probably be worn or chipped, if so replace them, this is usually evident by the kickstart 'slipping' after initially engaging. They don't engage sometimes if the 'pusher' spring is weak or partially snapped. again, inspect and replcace.
Once you're done, reassemble making sure the loose plate on the kickstarter is properly orientated, the 'T' section goes at the bottom. Also if you have an oil pump, make sure you either remove it from the cases or align the drive before fitting the case, otherwise you will smash it (voice of experience).
Hope this helps.
Dave.