I recently fitted a Pinasco 215 to my px200. 60mm maz crank and sito plus exhaust, standard carb
I had previously been running a standard top end, witha 1.5mm packer under the barrel to compensate for the 60mm crank.
I DID NOT use this packer with the pinasco because it seemed OK without it, ie, clearing ports nicely and squish around 1.5mm
Timing with standard barrrel fitted was 23 btc. That is also what Pinasco recommend, but I found the scoot would pink badly with that timing and not rev out.
I changed to 19 Btc, and that was much better, but the engine still got hot very quickly and started pinking again after 10 minutes on the motorway.
I tried every combination of jets, right up to a 150, but no joy. I even used a 0.7mm head gasket to try and lower compression, no good.
Somewhere along the line the kit has now got too hot and damaged the nicasil lining. I may be able to recover it for short duration racing, but it will never tour.
When the kit was running well it was bloody great, and I am considering getting another one, but can anyone tell me how you set these things up with a 60mm crank so they don’t blow?