Blumby, just "poke" around the choke setup, remove the throttle cable and and engage throttle assemby by hand, that way you'll get an idea of what needs to be tweaked in or out in order to make the choke engage on full throttle. Like rusty ute said, with these it's more often than not a choke issue and a carby clean at worst.
Have a go, they're not that hard! As for a service manual, good luck with that, they don't exist, from what i'm led to believe.
As for the catcher, when you see one you'll know, they're pretty unique because the 2 halves that join to make the cather are not your traditional "top and bottom style catchers, but the 2 halves come as a left and right setup. So in effect the catcher is joined in the middle. I'll try and get a closeup pic out to you over the weekend.
Last edited by bigted; 03/08/13 08:01 PM.