In getting Trey running, I was doing carb syncing with a new MotionPro unit that has the 4 tubes with liquid. Made the mistake of revving him and sucking fluid from the unit. (THEN I read the directions    )

So here is a hillbilly method I used and he really does run better than ever

1. Start bike and let warm up a little.
2. Unplug left plug and note how bike runs (i.e. how much it slows down)
3. Plug back in
4. Unplug right plug and note same
5. Plug back in
6. Tweak the carb sync screw
7. Repeat process until unplugging either plug results in the same amount of slowing of the engine
Note: During process, idle screw may need adjustment either way.

This would only work for 2 cylinders - and it was really cool. I got the idea of unplugging one side from all the work to determine what was wrong with him. I figured if both cylinders were working the same, unplugging either side would result in the same effect on the engine. If one side was working more than the other, unplugging one side (side not doing much) would do little while unplugging the other side (the side doing more work) might even kill the engine.

Of course this is after checking for air leaks and making sure the petcock vacuum line is connected (yea,got pulled off putting in the doesn't-fit-in-a-GS500 air box)

Call me    but it worked and is a logical way to balance 2 cylinders. Trey is running sooooo smoooooth that even up hill at 2.5k RPM he is smooth as powder on a monkey butt. (Changing pilots to 40 rest-of-world size from 37 USA-size may have helped that a little)

(OK, ________ (you know who you are) , tell me how dumb I am. I'll be out for a week so rant all you want - I won't be here to read it     and not once did I call the carbs "clip-ons"    I'll be where you get really great  and swinehaxen )

Sounds like an idea that works...

BUT,

I would never pull a plug wire while the engine is running - doing so MAY damage the electronic ignition control unit = big money to replace. 

Alternatively, you could rig up a temporary connector inline between plug wire and plug, with a wire terminated by an alligator clip that could be grounded against the engine while running. This would do the same as just pulling the plug wire but with less risk to the electronics.

Oh yeah, the shock hazard, but that can be fun too.