I had a lot of pinking problems, so I ordered this worb5 (andreas worbel) special head for the pinasco longstroke. I bougut it here at sip, I think art. number is 43322850. It is a standard piagio head reworked. I use a 1.5 mm base gasket.
What are your jetting??? Ignition???
Mine are: 125 main, ignition 21º.
How about sip performance exhaust stainless steel??? Less noisy???
Stainless steel is too loud, and the output is smaller than steel.
I mount the same configuration (pinasco 213, longstroke mazuchelli 60mm fine heaved, scootrs stainless steel, si 24), what's the modification for the cylinder head ?