You may not need a rebuild kit for them mate, remove tank and just unbolt them from air filter and head isolators, undo the throttle and choke cables.
I use a trailer tie-downs to hold the airfilter and tubes back, makes it real easy to remove the carbs, remove them from the right hand side (your right if sitting on the bike).
When putting them back on you can use the tie-downs in reverse by wrapping them around the forks and the backs of the carbs and use the ratchet action to move them back into the isolators.
While you've got them off just clean them as best you can, lightly sand the pivot pins (axels) to avoid floats hanging (jamming).
Remove all the jets and especially clear the small holes in the tubes, soak the carbs if you can.
Seriously unless there is a fault in the carbs then you don't need to buy any rebuild kits, the original stuff is fine and probably better quality anyway.
