What's the nearest thing to a manual for these? I've got something v basic from the internet but I wondered if there's anything like a manual available.

When I was rebuilding my 349 I found scraps of info on the web but not much. There's loads of knowledgeable people on here and I learnt loads simply by searching through previous posts. In the end I did manage to get a workshop manual, but it isn't a lot of use apart from basic stuff like torque settings.

If you need to strip anything down in the motor, your best bet is to take your time, be methodical and take loads of photos. Aside from the (slightly weird) motor, the rest of the bike is totally basic and you could probably put it back together with your eyes shut!