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DEXTER RACING Item number: DEX110014

Crankshaft -DEXTER RACING- Vespa Smallframe (full cheek for diaphragm intake, cheeks=Ø88.5mm,) full cheek 54mm stroke, 105 mm CNC connecting rod, Ø 20mm cone)

Stroke: 54mm

Connecting rod: 105 mm (CNC)

Cheeks: Ø 88.5 mm (housing Ø 89-90 mm)

Cone: Ø 20 mm (large/blunt)

Shaft width: 35 mm (std.)

Application: from 125 cc, diaphragm on cylinder/casing

Suitable up to: >30 HP

359,00 €*

available immediately

Shipping weight 1,4 kg

Information on product safety

Crankshaft - DEXTER RACING full cheeks (Vespa Smallframe) - 54mm stroke / 105 mm connecting rod / Ø 88.5 mm cheeks

Heavy-duty tuning shaft for Vespa smallframe engines with cylinders from 125 cc and diaphragm intake (on the cylinder or in the housing). To increase torsional rigidity, the shaft has enlarged cheeks with Ø 88.5 mm; the crankcase must therefore be spindled out to Ø 89-90 mm. Designed for powerful setups up to >30 hp.

Stroke 54mm Connecting rod 105 mm Cheeks Ø 88.5 mm Cone Ø 20 mm (large) Suitable for >30 hp

Technical features

Full cheeks for maximum pre-compression and rigidity

Enlarged overlap on the crank pin for high torsional rigidity

CNC connecting rod 105 mm, high-quality crank pin & needle bearing

Standard shaft width 35 mm, shaft seal seat Ø 20 mm

Large/blunt cone Ø 20 mm (PX-typical ignitions/pole wheels for smallframe adapter)

Installation & compatibility

For smallframe engines with cylinders ≥125 cc and reed valve inlet (cylinder/casing)

Housing machining required: spindles to Ø 89-90 mm (cheeks Ø 88.5 mm)

Compatible series (gearbox housing): V50/50 Special, Primavera 125, ET3, PK (S/XL/XL2), PK ETS, PK HP/FL2

Recommended for high-performance setups, trackdays & long-distance riding - suitable for everyday use with the right set-up

Note: Case machining & design

Crankcase diameter Ø 88.5 mm → spindle out crankcase to Ø 89-90 mm.

The 105 mm connecting rod length changes the crushing edge/timing - adjust with base/head gaskets if necessary.

Designed for setups with >30 hp; particularly recommended in conjunction with reed valve intake systems.

FAQ - Frequently asked questions about the DEXTER full cheek shaft

Does the shaft fit into the housing without spindles?

No. Due to the Ø 88.5 mm cheeks, the smallframe housing must be spindled to Ø 89-90 mm.

For which inlet is the shaft intended?

For diaphragm inlet on the cylinder or in the housing. The full cheek geometry is not intended for classic rotary valves.

Which bearings and oil seals are used?

Shaft seal seat Ø 20 mm (large cone).

Conclusion: Very resilient full cheek race shaft with 54/105 geometry, high torsional rigidity - the robust basis for powerful smallframe engines at a fair price.

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Matching

Accessories

Ball bearing -6005 C3- (25x47x12mm) - (used for crankshaft Fabbri and conversion to ETS) Vespa V50, V90, SS50, SS90, PV125, ET3, PK S, PK XL)

Ball bearing -6005 C3- (25x47x12mm) - (used for crankshaft Fabbri and conversion to ETS) Vespa V50, V90, SS50, SS90, PV125, ET3, PK S, PK XL)

Oil seal 27x47x6mm -BGM PRO FKM/Viton® (E10/etahnol resistant)- (used for rear hub Vespa PX (-1984), Rally180 (VSD1T), Rally200 (VSE1T), Sprint (since 1972), TS (since 1972), GT125 (since 1972), GTR125 (since 1972), GL150 (VLA1T) (since 1972)), crankshaft

BGM PRO
BGM1043

Oil seal 27x47x6mm -BGM PRO FKM/Viton® (E10/etahnol resistant)- (used for rear hub Vespa PX (-1984), Rally180 (VSD1T), Rally200 (VSE1T), Sprint (since 1972), TS (since 1972), GT125 (since 1972), GTR125 (since 1972), GL150 (VLA1T) (since 1972)), crankshaft

Clutch spider -FABBRI RACING FB45- Vespa V50, V90, SS50, SS90, PV125, ET3, PK50, PK80, PK50 S, PK80 S, PK125 S, PK50 XL, PK125 XL, ETS, PK50 HP, PK50 SS

Fabbri Racing
FR0007

Clutch spider -FABBRI RACING FB45- Vespa V50, V90, SS50, SS90, PV125, ET3, PK50, PK80, PK50 S, PK80 S, PK125 S, PK50 XL, PK125 XL, ETS, PK50 HP, PK50 SS

Clutch friction plate set incl. steel plates -FABBRI RACING FB 36, FB 24 EVO (cork padings+ duralumin discs)- Vespa Smallframe V50, V90, SS50, SS90, PV125, ET3, PK50, PK80, PK50 S, PK80 S, PK125 S, PK50 XL, PK125 XL, ETS, PK50 HP, PK50 SS - 4 discs

Fabbri Racing
FR0009

Clutch friction plate set incl. steel plates -FABBRI RACING FB 36, FB 24 EVO (cork padings+ duralumin discs)- Vespa Smallframe V50, V90, SS50, SS90, PV125, ET3, PK50, PK80, PK50 S, PK80 S, PK125 S, PK50 XL, PK125 XL, ETS, PK50 HP, PK50 SS - 4 discs

Clutch spider with primary gear repair kit -FABBRI RACING performance CNC- Vespa V50, V90, SS50, SS90, PV125, ET3, PK50, PK80, PK50 S, PK80 S, PK125 S, PK50 XL, PK125 XL, ETS, PK50 HP, PK50 SS

Fabbri Racing
FR0021

Clutch spider with primary gear repair kit -FABBRI RACING performance CNC- Vespa V50, V90, SS50, SS90, PV125, ET3, PK50, PK80, PK50 S, PK80 S, PK125 S, PK50 XL, PK125 XL, ETS, PK50 HP, PK50 SS

Clutch -FABBRI RACING FB45- Vespa V50, V90, SS50, SS90, PV125, ET3, PK50, PK80, PK50 S, PK80 S, PK125 S, PK50 XL, PK125 XL, ETS, PK50 HP, PK50 SS

Fabbri Racing
FR0031

Clutch -FABBRI RACING FB45- Vespa V50, V90, SS50, SS90, PV125, ET3, PK50, PK80, PK50 S, PK80 S, PK125 S, PK50 XL, PK125 XL, ETS, PK50 HP, PK50 SS

Spring set for clutch -FABBRI RACING top r (XXXL)- Vespa V50, V90, SS50, SS90, PV125, ET3, PK50, PK80, PK50 S, PK80 S, PK125 S, PK50 XL, PK125 XL, ETS, PK50 HP, PK50 SS - 16 pcs

Fabbri Racing
FR0033

Spring set for clutch -FABBRI RACING top r (XXXL)- Vespa V50, V90, SS50, SS90, PV125, ET3, PK50, PK80, PK50 S, PK80 S, PK125 S, PK50 XL, PK125 XL, ETS, PK50 HP, PK50 SS - 16 pcs

Woodruff key -FABBRI RACING hardened- Vespa Smallframe V50, PV, ET3, PK - suitable for pole wheel, primary, clutch

Fabbri Racing
FR0034

Woodruff key -FABBRI RACING hardened- Vespa Smallframe V50, PV, ET3, PK - suitable for pole wheel, primary, clutch

Primary drive -FABBRI RACING reinforced- Vespa V50, PV125, ET3, PK50, PK80, PK125 - 24-72 = 3.00 (straight teeth)

Fabbri Racing
FR0056

Primary drive -FABBRI RACING reinforced- Vespa V50, PV125, ET3, PK50, PK80, PK125 - 24-72 = 3.00 (straight teeth)

Primary drive -FABBRI RACING reinforced- Vespa V50, PV125, ET3, PK50, PK80, PK125 - 27-69 = 2.56 (straight teeth)

Fabbri Racing
FR0057

Primary drive -FABBRI RACING reinforced- Vespa V50, PV125, ET3, PK50, PK80, PK125 - 27-69 = 2.56 (straight teeth)

Clutch -FABBRI RACING FB36- Vespa V50, V90, SS50, SS90, PV125, ET3, PK50, PK80, PK50 S, PK80 S, PK125 S, PK50 XL, PK125 XL, ETS, PK50 HP, PK50 SS

Fabbri Racing
FR0073

Clutch -FABBRI RACING FB36- Vespa V50, V90, SS50, SS90, PV125, ET3, PK50, PK80, PK50 S, PK80 S, PK125 S, PK50 XL, PK125 XL, ETS, PK50 HP, PK50 SS

Gear cog 1st speed -FABBRI RACING, 4-speed gearbox- Vespa PK S, PK XL1, PK XL2, ETS, V50 (V5A1T, 69444-), Special (V5B3T, 94315-), Elestart (V5B4T, 1514-), PV125 (VMA2T,150203-), ET3 (VMB1T,8161-) - 55 teeth (extra long, +3)

Fabbri Racing
FR0087

Gear cog 1st speed -FABBRI RACING, 4-speed gearbox- Vespa PK S, PK XL1, PK XL2, ETS, V50 (V5A1T, 69444-), Special (V5B3T, 94315-), Elestart (V5B4T, 1514-), PV125 (VMA2T,150203-), ET3 (VMB1T,8161-) - 55 teeth (extra long, +3)

Gear cog 2nd speed -FABBRI RACING, 4-speed gearbox- Vespa PK S, PK XL1, PK XL2, ETS, V50 (V5A1T, 69444-), Special (V5B3T, 94315-), Elestart (V5B4T, 1514-), PV125 (VMA2T, 150203-), ET3 (VMB1T, 8161-) - 53 teeth (long +1)

Fabbri Racing
FR0088

Gear cog 2nd speed -FABBRI RACING, 4-speed gearbox- Vespa PK S, PK XL1, PK XL2, ETS, V50 (V5A1T, 69444-), Special (V5B3T, 94315-), Elestart (V5B4T, 1514-), PV125 (VMA2T, 150203-), ET3 (VMB1T, 8161-) - 53 teeth (long +1)

Gear cog 3rd speed -FABBRI RACING, 4-speed gearbox- Vespa PK S, PK XL1, PK XL2, ETS, V50 (V5A1T, 69444-), Special (V5B3T, 94315-), Elestart (V5B4T, 1514-), PV125 (VMA2T, 150203-), ET3 (VMB1T, 8161-) - 50 teeth (std)

Fabbri Racing
FR0089

Gear cog 3rd speed -FABBRI RACING, 4-speed gearbox- Vespa PK S, PK XL1, PK XL2, ETS, V50 (V5A1T, 69444-), Special (V5B3T, 94315-), Elestart (V5B4T, 1514-), PV125 (VMA2T, 150203-), ET3 (VMB1T, 8161-) - 50 teeth (std)

Gear cluster set incl. 4th gear with 47 teeth -FABBRI RACING Triangular/Polygon- Vespa V50, PV125, ET3, PK50, PK80, PK125 S-XL/XL2 - 10-14-17-19 teeth

Fabbri Racing
FR0090

Gear cluster set incl. 4th gear with 47 teeth -FABBRI RACING Triangular/Polygon- Vespa V50, PV125, ET3, PK50, PK80, PK125 S-XL/XL2 - 10-14-17-19 teeth

Clutch spider -FABBRI RACING FB45 for Triangular/Polygon auxiliary shaft- Vespa V50, V90, SS50, SS90, PV125, ET3, PK50, PK80, PK50 S, PK80 S, PK125 S, PK50 XL, PK125 XL, ETS, PK50 HP, PK50 SS

Fabbri Racing
FR0093

Clutch spider -FABBRI RACING FB45 for Triangular/Polygon auxiliary shaft- Vespa V50, V90, SS50, SS90, PV125, ET3, PK50, PK80, PK50 S, PK80 S, PK125 S, PK50 XL, PK125 XL, ETS, PK50 HP, PK50 SS

Clutch spider -FABBRI RACING FB5r for Triangular/Polygon auxiliary shaft and FB5r 5-disc clutch- Vespa V50, V90, SS50, SS90, PV125, ET3, PK50, PK80, PK50 S, PK80 S, PK125 S, PK50 XL, PK125 XL, ETS, PK50 HP, PK50 SS

Fabbri Racing
FR0094

Clutch spider -FABBRI RACING FB5r for Triangular/Polygon auxiliary shaft and FB5r 5-disc clutch- Vespa V50, V90, SS50, SS90, PV125, ET3, PK50, PK80, PK50 S, PK80 S, PK125 S, PK50 XL, PK125 XL, ETS, PK50 HP, PK50 SS

Gear cluster -FABBRI RACING- Vespa V50, PV125, ET3, PK50, PK80, PK125 S-XL/XL2 - 10-14-17-20 teeth - compatible with genuine gear box, extra short 4th gear

Fabbri Racing
FR0139

Gear cluster -FABBRI RACING- Vespa V50, PV125, ET3, PK50, PK80, PK125 S-XL/XL2 - 10-14-17-20 teeth - compatible with genuine gear box, extra short 4th gear

Silentblock engine -FABBRI RACING for quattrini casings C1, C2- Vespa V50, V90, SS50, SS90, PV125, ET3, PK S, PK XL

Fabbri Racing
FR0246

Silentblock engine -FABBRI RACING for quattrini casings C1, C2- Vespa V50, V90, SS50, SS90, PV125, ET3, PK S, PK XL

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Crankshaft -DEXTER RACING- Vespa Smallframe (full cheek for diaphragm intake, cheeks=Ø88.5mm,) full cheek 54mm stroke, 105 mm CNC connecting rod, Ø 20mm cone)

Crankshaft -DEXTER RACING- Vespa Smallframe (full cheek for diaphragm intake, cheeks=Ø88.5mm,) full cheek 54mm stroke, 105 mm CNC connecting rod, Ø 20mm cone)

Crankshaft -DEXTER RACING- Vespa Smallframe (full cheek for diaphragm intake, cheeks=Ø88.5mm,) full cheek 54mm stroke, 105 mm CNC connecting rod, Ø 20mm cone)

Crankshaft -DEXTER RACING- Vespa Smallframe (full cheek for diaphragm intake, cheeks=Ø88.5mm,) full cheek 54mm stroke, 105 mm CNC connecting rod, Ø 20mm cone)

Crankshaft -DEXTER RACING- Vespa Smallframe (full cheek for diaphragm intake, cheeks=Ø88.5mm,) full cheek 54mm stroke, 105 mm CNC connecting rod, Ø 20mm cone)

Crankshaft -DEXTER RACING- Vespa Smallframe (full cheek for diaphragm intake, cheeks=Ø88.5mm,) full cheek 54mm stroke, 105 mm CNC connecting rod, Ø 20mm cone)