Toomany,
The stalling condition may have one or more issues associated with it.
Stuff you may want to check, Fresh fuel, clean air filter, reeds in good shape, carb slide not scratched or chrome worn off where it rides in carb body, jets and bowl clean, and the choke idle circuit for dirt and scratches.
I've seen two PJ choke/idle pieces broken, wouldn't raise or lower the "needle" in the idle circuit as you turn the "knob" on top of the choke.
I think you'll find most of the guys with PJ's are looking for a PWK.
Something to consider is what type of riding are you doing, and how hard are you riding.
I had a PJ on my '85 CR and it was fine for trailriding/single track for me.
I did have to replace the slide, choke,needle and jets.
The old girl was tired, but she had a great body. (that just doesn't sound right)
Anyway, if the body of the carb isn't too bad you can re-build it.
http://www.sudco.com/Unfortunatly, it's almost as much as the new PWK.
I also have a PWK 38AS (air striker)
http://www.keihin-us.com/pwk.htm PWK Air Strikers: Directs air to main nozzle for improved signal and throttle response.
Great low end throttle response at the loss of top end.
I got the 38 a.s. used, quite a bit less than a 39.5.
The Air Striker worked best for me, (single track woods etc.) But I rarely get a chance to run WOT very long ....
I don't have a PWM or Lectron Etc. so I can't comment on them, but something else you may want to consider.
Tuck\o/