phatmike11 wrote on 12/31/69 at 16:00:06:

Mike, it's the same as all the home brewed carb mods we're all doing. Check the technical documents area here for details.

No need to pull the carb. Take off your gas tank...loosen up the carb clamps fore and aft...and twist your carb in it's mounts to gain access to the top and bottom.

The needle goes in from the top and the jet goes in from the bottom. Pull the bottom (the float bowl - 4 screws). Make sure you pull the bowl staight off or you'll bend/damage the floats. They're very fragile and must not be disturbed. The rest should be pretty self evident. There are lots of pics and instructions in the technical documents area.

Be careful with the rubber CV diaphram you find in the top. It's very expensive to replace.

If you're smoking when the throttle is between 1/8th and 3/4, lower the needle (raise the clip) 1 notch to make it leaner.

For your backfiring, turn out your mixture screw 1/2 or 1 turn more and see if that helps. Mine's out past 2 turns if I recall correctly.

No carb sync. That is only for bikes with multiple carbs.

Too loud...that would be your choice of mufflers. You may be able to change the baffle.

If you've got backfiring (normally too lean) and black smoke (too rich), you may have an exhaust leak letting air into the exhaust and causing the backfiring even though it may be running rich.