I made a new tool (attachment) for my compressor to do this (@25psi)....will post pics after this weekend....maybe even a video....if I can find my tripod and figure out my new cam...
I've got a Phillips on the clutch and a 3mm Allen on the brake side.the older versions of the bike had phillips head drain screws but the newer ones did have allen head screws
some one must have pieced together two sets of carbs no big deal as that is the only difference however that gunk in the petcock is looking nasty i would definitely say that could cause an issueI've got a Phillips on the clutch and a 3mm Allen on the brake side.
Here is what came out. Also found the real culprit was rust from the tank I assume.