I have done it via the carb -I remove the carb, air box,intake rubber and loosen the bolts behind the clutch just enough to get it out, usually though I do drop the tank-opps forgot -LOL.
I will tell you that I have currently found it to be easier to just pull the dam
motor ((
Internal Combustion Engine ? )) though, the seat gets removed expansion chamber, the just loosen the carb from the air box intake and a couple min utes for the motor (( Internal Combustion Engine ? )) mounts and your there, try it -you may find it easier!!ALTHOUGH-if you got water colled head on there, then you got a pain in the arse for sure-forgot about as well.
I guess it is a pain in the arse then-LOL!