RZ Carbs

[2steve]

It bothered me that the original petcock would continually drip really slow when I would pull the tank. It was epoxy-modded. so reserve was not a thing anymore.

If you have the OG petcock and there's no vacuum line, it probably has epoxy in the the rotating stem passageway.

There's a thread above from Kawtriplefreak where he did a splendid job working out an RD400 lever style petcock to make it work with an RZ knob. Probably lined up just right. I took the lazy boy route.

[2steve]

Revising my opinion of the above TZR125 petcock. The knob is too far in along with being difficult to turn. Something must change.

[m in sc]

have to extend the knob shaft out.

[2steve]

To update further, it seems that the TZR125 fuel valve allows the carb bowls to slowly run out of fuel.
That's the theory and the way that the RZ is behaving.
Getting a bigger petcock as soon as time slows.

[2steve]

have to extend the knob shaft out.

I did this. Not pretty but kinda happy with it. Riveted on a cutoff-wheeled and filed extruded aluminum piece dipped in plasti dip.

Very easy to turn left-handed now.

[m in sc]

thats pretty good steve.
i can draw up and 3d print something to attach to that if you want.

[85RZwade]

Wait, I missed something; the TZR petcock wasn't keeping the bowls full but you extended the knob anyway?

[2steve]

Wait, I missed something; the TZR petcock wasn't keeping the bowls full but you extended the knob anyway?

I understand. That was one of problems with the original 26mm carbs. They would starve themselves. I'm guessing the needle+seats were doing it because that TZR petcock was tested for flow into a bucket and it ended up doing very well.

Sorry, you got tangled up in my nightmare. The RZ is now an enjoyable ride, just in time as the heavy humid heat is lifting.

[85RZwade]

Got it