Topic: Petcock leaking, another don't overlook the easy fix.

[Don R]

  So I have this cb750K2 with a leaky petcock, I don't ride it much and am trading it to my brother for an engine I don't want, therefore it needs fixed. I rebuilt it recently but bought another kit, obviously made in china. I removed the valve, sanded the tank bottom, cleaned the petcock top, replaced the o ring, put it back in.  Now it has aluminum tank screw to petcock body washers. They leaked through, I greased them and overtightened them with my JIS screwdriver. They finally appear to hold but the sediment bowl still leaked. Several different tries and o rings later, I left it turned off and blew into the gas line. Fuel sprayed sideways out of the sediment bowl. L0L!
 There is a tiny pinhole in the bowl. I swapped it with another one and, it's finally fixed.

[Johnie]

Atta boy Don...don't those issues just drive a guy nuts. Nice job!

[bryanj]

Those original fiber washers are expensive but do work, i also had hit and miss results with alloy washers, even the ones with rubber inserts known in uk as "Dowty Washers"

[CycleRanger]

There is a tiny pinhole in the bowl. I swapped it with another one and, it's finally fixed.

Yep, I have run into that. Pin hole in the sediment bowl from corrosion over time.

[newday777]

There is a tiny pinhole in the bowl. I swapped it with another one and, it's finally fixed.

Yep, I have run into that. Pin hole in the sediment bowl from corrosion over time.

I'll have to put an air air pressure test to the one I cleaned up last year that was very full of powder when I took it off the tank. It cleaned up well in the ultrasonic cleaner amazingly. (I thought I had pictures of it after cleaning but will take new pics and post later)

[dave500]

i use copper washers,work fine.

[newday777]

There is a tiny pinhole in the bowl. I swapped it with another one and, it's finally fixed.

Yep, I have run into that. Pin hole in the sediment bowl from corrosion over time.

I'll have to put an air air pressure test to the one I cleaned up last year that was very full of powder when I took it off the tank. It cleaned up well in the ultrasonic cleaner amazingly. (I thought I had pictures of it after cleaning but will take new pics and post later)

The ultrasonic cleaning results