Developed by Ralph Bollag in Switzerland. This is the setup that put Vespa wideframe tuning on the map. Incredible torque and speed for your '53-'58 three-stud wideframe motor. This set includes every specialty part that you need to transform your humble handlebar bike or VB1 into a sleeper that will beat P200s and Rallys all day long. Includes Bollag 151 Cylinder kit, Stoffi roller-bearing crankshaft, Bollag 64-tooth primary up-gear (works with stock or aftermarket clutches), Bollag inlet manifold, Bollag-prepped Polini CP23 carburetor, and Widebox expansion-chamber exhaust.
