The motor is made with our own made crank shaft "Kingwelle" 61 mm stroke with 116 mm conrod. Our own clutch system "King Drag Bike Clutch" - Keihin PWM 38mm - exhaust Prototyp in streight version - vespatronic standard ignition.
Crank:
https://m.facebook.com/kingwellen/photos/pcb.637019759773105/637018929773188/?type=3&source=48
Clutch:
https://youtu.be/KGiP59qCcAk
Exhaust:
https://m.facebook.com/photo.php?fbid=488191191322630&id=165318283609924&set=pcb.488191571322592&source=48
This is a video with the same motor in a original street Vespa ET3 frame without cutting anything with the exhaust in normal dessin with side box left hand side
https://youtu.be/kMt-GB2jmCc
We love the output of the cylinder, actually we are testing more things and we will present the results.
We are also interessted what's your experiances.
Buon serata