UPDATE: Got a parts diagram (happy to share if anyone keen) and decided to find out why no drive to roller.....let's just say it took a puller, 4lb hammer, gas torch and an angle grinder to get the drive sprocket off. The sprocket was on a taper with a key way and a Nyloc nut and heaps of rust. The sprocket itself quite soft metal so bent out of shape easily......Fun Fun Fun!
Got the roller out and apart to find extensive rust on the one-way pawls so I'm drawing a line in the sand and walking away. Long story short, if anyone wants to swop a bottle of rum for a Enduro 5hp motor that is complete, runs and starts, please contact me....