Hey guys,
to anyone who is thinking of replacing their PJ with a 39mm pwk I can't recommend it high enough... I just went for the first ride with the new carby and it has better throttle response, pulls harder, more over-rev and starts easier. There is absolutely nothing that my old pj carb did better than the pwk. I bought it off ebay for $240 AUD delivered to my door with the carby re-jetted to suit your specs...
just thought I'd tell you guys