One severe warning, the Pinasco guidelines propose that you can cut 20mm off the crank to increase inlet timing. This may work for the 3-port kit on a PX125 that closes the inlet port about 40 degrees after TDC. For a T4/Touring/150 crank, the original timing is 54 degrees after TDC. Adding 23 degrees to that + 5 for the extended inlet port is 82 degrees, far too late to have a good slow running engine. I did this and the engine beare keep alive at idle. Giving rapid gas floods it completely due to back-blowand I will have to replace the whole crank. Pinasco should have updated their guidelines for this kit instead of copying the PX125 kit
My tip is do NOT cut the crank unless you have perfect control of the inlet timing and know where it will end up.