For those of you with PA50's and top speed problems .. I was wondering if this might help.
The PA's front pulley has to be assembled correctly or it won't work properly.
Otherwise you might think you are tightening the nut that holds the left side pulley half on .. but you aren't.
.. the problem is the flat 'tab washer' gets jammed in the threads of the shaft.
Its pretty simple .. but it has to be done right.
It goes like this.
Take the large flat nut off the center.
Take the tab-washer off and lay it on a flat surface and gently tap it flat with a hammer.
Put the tab washer back on and line its flats up with the flats on the shaft .. while holding them lined up .. take a magic-marker and mark the washer and the ramp plate behind it .. so the two marks line up.
Now put the nut on and start tightening it.
You will find the tab washer behind the nut starts to spin in the same direction as the nut .. so take a screwdriver and tap the washer back - so the two marks you made .. line up again.
Tighten the nut
Tap the washer back
Tighten the nut
Tap the washer back
But thats not all.
The belt also drops to the bottom of its path.
It also stops the nut from tightening.
So after a few nut 'twists'... spin the pulley a turn... then the belt will start to ride up higher.
So... its...
Tighten the nut
Tap the washer back
Tighten the nut
Tap the washer back
Spin the pulley
Tighten the nut
Tap the washer back
Tighten the nut
Tap the washer back
Spin the pulley.
This way the nut will get snugged up properly and the variator will work properly.
When you are done the shaft should stick out of the nut a little bit.
Then bend the washer over to secure the nut.
Maybe that will help somebody.