BGM PRO Torquemaster - gear wheels for Vespa PX Lusso
BGM PRO Torquemaster - when standard is not enough.
BGM PRO Torquemaster - built for beefy torque and massive power.These gear wheels are not just spare parts - they are the answer to performance demands beyond the series limit. Manufactured from the same material used by KTM, BMW and others in high-performance gearboxes. Hardened at ThyssenKrupp, precision-machined and tested for maximum load in the laboratory - up to 90 percent more resilient than original Piaggio components. Do you ride an engine with over 30 hp and 35 Nm? Then you need gears that can withstand that - permanently. The Torquemaster gear parts are designed to do just that.
✔️ Suitable for engines with over 30 hp & more than 35 Nm torque
✔️ Made from 14NiCrMo13 - high-alloy, case-hardened special steel
✔️ Heat treatment at ThyssenKrupp - industrial process reliability
✔️ Surface hardness of 58 to 60 HRC with tough core structure
✔️ Interchangeable with all PX Lusso gears from 1984 onwards
✔️ Suitable for PX125, PX150, PX200, Cosa, T5, LML Star & Stella 2-stroke
✔️ For touring, everyday use & high-performance tuning setups up to racing
✔️ Combination with sporty countershaft possible (e.g. countershaft BGM 12-13).
e.g. auxiliary shaft BGM 12-13-16-19 with 4-speed 35-tooth gear)
Material properties and heat treatment
The BGM PRO Torquemaster gears are made of 14NiCrMo13 (1.6657), a high-alloy case-hardening steel used in high-performance gearbox construction (e.g. in motorsport). Compared to the previous standard material (20NiCrMo2-2), there are decisive advantages:
✔️ High nickel content (~3.25 %)
Increases toughness combined with high hardness - ideal for load changes, gas shocks or clutch slipping.
✔️ Surface hardening to 58-60 HRC
Perfect combination of wear-resistant surface and tough core for maximum contact and bending load.
✔️ Dimensional accuracy after hardening
Low-stress annealing and precise machining ensure exact tooth flanks, low run-in loss and smooth running.
✔️ Industrial heat treatment at ThyssenKrupp
Ensures consistent hardness curves and reproducible microstructural properties.
✔️ 90 percent higher load capacity compared to Piaggio gears
Proven in independent pulsation tests.
Compatibility
Torquemaster gearwheels are fully interchangeable with the original gearwheels of all Vespa Lusso-style gearboxes from 1984 onwards. Compatible with:
✔️ Vespa PX125 / PX150 / PX200 Lusso (1984-2016)
✔️ Vespa PX Disc, PX MY, PX 2011
✔️ Vespa Cosa 1 and 2 (all models)
✔️ Vespa T5 (all models)
✔️ LML Star 2-stroke, Stella 2-stroke
The gears are compatible with all commercially available auxiliary shafts that are approved for use with Piaggio or BGM components.
Frequently asked questions - BGM PRO Torquemaster gearwheels
Can I replace just one gear?
Yes, the gears are available individually and are specifically interchangeable.
What power ranges are the gears suitable for?
For all setups from touring engines to fully tuned high-performance units with over 30 hp and 35 Nm torque.
What are the benefits of the new 14NiCrMo13 material?
Higher toughness, better dimensional stability after hardening, significantly higher fatigue strength - even under racing conditions.
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