Gear Selector FABBRI racing, “4-gear PK”

h 50,2 mm
hardened
type: round/50,2mm
4-arms, incl. spring and ball
Product description
A stable and enduring gear selector spider by FABBRI, for Vespa smallframe engines. The gear selector spider is an especially important but fragile component of the drive train in Vespa smallframe engines. Exact production material density is essential, not too hard or too soft. It has to solidly engage with the gear cogs, while remaining easily operable when another gear is selected. Many manufacturers produce innovative solutions to this problem. Now FABBRI have concerned themselves with this theme and they are not only renowned for their very good and economically priced clutches.
Enduring
Precise
Includes spring
The FABBRI gear selector spider is produced using a special steel alloy which is also surface tempered. This guarantees both stability and durability. The perfect union, without mechanical play, is enabled with the use of a selector spring of medium stiffness. This is also included in the kit and according to the people at FABBRI, ensures a clear, intuitive and precise gear selection while riding.
Conclusion
: A meaningful upgrade for an enduring and comfortably operable smallframe engine. The best set up – our
TIP:
Input shaft, BFA MOTORI, 4-speed # 11159000
Output shaft thrust washers,, # 16541900
Mounting tool, gear selector spider spring # 63791000
Differentiation of 4-speed Vespa Smallframe gear selectors. For the 4-speed engines of the Vespa Smallframe models, there are two different gear selectors that fit different gearboxes or their gearwheels. There are two characteristics that distinguish the two types of gear selectors. 1. the shape of the transition to the upper end of the selecor. The later “PK type” has a radius there, i.e. round. The earlier “V50/PV type” is angular at this point. 2. the overall height of the gear selector. The “PK type” is 50.2mm high, the “V50/PV type” is 51mm high. Today there is a whole range of manufacturers who produce gear selectors for tuning and racing purposes. Unfortunately, some suppliers no longer adhere to the classic distinguishing features. DRT, for example, no longer produces the round gear selector and CRIMAZ, for example, produces the 50.2mm gear selector in 48.8mm. Therefore, we have decided to indicate either “type round/50.2mm” or “type square/51mm” for each 4-speed smallframe gear selectors.