Shift claw BGM PRO SPORT for Vespa Smallframe PV, ET3, PK S, PK XL, PK XL2/FL2/HP
BGM PRO has given the successful BGM6550 shift claw an update. The successor BGM6555 has a completely redesigned locking profile. This means that the gears are even more precise and the dreaded gear jumping is completely prevented.
The BGM Pro shift claw is made of high-quality 15CrMo5 (SCM415) chrome molybdenum steel and is therefore very durable. The flanks have very tight tolerances compared to the shift claws otherwise available on the market. This means that the claw is guided precisely in the main shaft and effectively prevents locking/tilting.
SUITABLE FOR The BGM Pro shift claw is made for the so-called PK gearbox type. This is driven with the round type shift claw (length of 50mm (overall height)). Round type shift claw means that the pins that lock into the gear wheel have a radius at the transition to the end of the arm.
IDENTIFY TRANSMISSION The PK type can be identified by the markings on the gear wheels. This always starts with a 42xx (=round shift claw with 50mm). The old type is identified by the number 37xx (= square shift claw with 51mm). The easiest way to recognize this type of gearbox from the outside is by the conventional rear wheel nut with M16 thread and safety basket including cotter pin. The old engines (with the previous gearbox type = shift claw 51mm / square) only have an M14 castle nut and cotter pin (without safety cage).
ALSO USABLE V50/PV/ET3 from 1976 The PK transmission version was already used in the last years of the V50 (V5A1T from No. 69444), V50 Special (V5B3T from No. 94315), V550 Elestart (V5B4T from No. 1514) as well as the PV125 (VMA2T from No. 150203) and ET3 (VMB1T from No. 8161) is used. The shift claw can of course also be combined with the main shaft of the older engines (M14 thread) if the gear wheels of the new gearbox type (PK marking 42) are also used at the same time.
PURPOSE OF USE The BGM Pro shift claw is designed for racing and has already been used very successfully there. However, it can be used in everyday use without any further restrictions and impresses with its high quality, perfect gear changing behavior and very long durability.
COMBINATION The BGM PRO Sport shift claw is perfectly matched to the combination with the BGM PRO gear wheels and the BGM PRO main shaft. However, like all BGM PRO vehicle parts, it was designed strictly for backwards compatibility with series parts.
