[WFO-KZ]

Once you get those plugs out, either put new ones back in or fill the hole with thick grease. Those plugs prevented the screws from oxidizing, and becoming useless as they become fused with oxidation into the carb body threads, never to be able to be adjusted again. Just a heads up on once beautiful GPZ. That bike is a collector quality machine.

I was faced with this problem and printed two versions of plugs. One with a spring-loaded tapered shank and the other with an O-ring seal. You can download either design here:

Mikuni Pilot Screw Plug by KLR-Tom

This is a snap-in, removable plug for most Mikuni motorcycle carbs. It covers the hole for your pilot screw. Keeps dirt and water out and keeps the screw threads from seizing. It should work on any carb that has a hole size of around 7 mm. See also my Mikuni Pilot Screw Plug (with O-ring).

www.thingiverse.com

Mikuni Pilot Screw Plug (with O-ring) by KLR-Tom

This is a snap-in, removable plug for most Mikuni motorcycle carbs. It covers the hole for your pilot screw. Keeps dirt and water out and keeps the screw threads from seizing. It should work on any carb that has a hole size of around 7 mm. See also my Mikuni Pilot Screw Plug (without O-ring).

www.thingiverse.com

 

[Kawasakian]

Very nice, and thoughtful!!

 

[jeandelockosirisrebo]

My rat GPZ, back in the day, your bike really is like a lone survivor

 

[Kawasakian]

Looks like you really enjoyed that bike.

 

[jeandelockosirisrebo]

Looks like you really enjoyed that bike.

Eventually I put good body work on it, I just don't have a photo handy of those days, never did quite get a gas tank that didn't leak and always had a problem with my lower case half/broken shift shaft collar

Happy with my modern bike though