BGM PRO heavy-duty crankshaft for Vespa VM, VN, ACMA, GL150, Motovespa & Douglas GL2, 42L2 & 92L2 Wideframe scooters running a BGM PRO 150cc cylinder kit.

The BGM PRO crankshaft for Vespa Wideframe models is manufactured from high-alloy forged blanks, offering exceptional strength and reliability. Designed as a heavy-duty tuning crankshaft, it is an ideal partner for the BGM PRO 150cc Wideframe cylinder, but is equally recommended as an indestructible upgrade for standard engines.

With a 57mm stroke and 110mm con-rod, the crankshaft features a high-quality forged connecting rod with needle bearings at both ends (Ø15mm gudgeon pin) for superior durability and reduced friction. Unlike the original plain bush design, the slotted lower eye ensures improved lubrication, allowing safe operation with a modern 1:50 fuel mix. A hollow-drilled crank pin further improves the balancing factor for smoother performance.

Please note: for 125cc engines originally built with a 54mm stroke, a 57mm-stroke, 150cc cylinder (e.g. BGM1550) is required.

BGM BGM057110