Upgraded Speedwheel (+10kph) for Vespa GTS 300 HPE (2019 onwards ONLY)
The Vespa GTS HPE has more power at the rear wheel than its predecessors, the final speed unfortunately does not benefit from this due to a top speed restriction which is programmed into the ECU from factory. The Speed wheel is also responsible for providing speed information to the dash, which is 15% out from factory! Compared to a GPS speedo, 115kph on the dash unit is only 100kph in real life.
This speed wheel essentially tricks the ECU into thinking the bike isn’t going as fast as it is, by correcting for the inaccuracy it is able to achieve the true speed – Meaning the bike will still be limited to 130kph, however a real 130kph not a 15% inaccurate 130kph (110kph).
The best part is this comes at no sacrifice to the ASR or ABS system, these still function as normal!
SPEEDWHEEL – Ingenious tuning part for more top speed from KÜBLER RACING for Vespa GTS HPE 300 models (from 2019 onwards)
10km/h faster without changing anything on the engine?
With the modified tone wheel from Kübler Racing this is possible without any problems.
The tone wheel is a slotted steel disc on the rear wheel.
This is used to determine the wheel speed for the ASR/ABS control.
- Plus 10km/h final speed
- No intervention in the engine necessary
- Easy to retrofit
- Not visible from outside
- No increased wear and tear
The Vespa GTS HPE has more power at the rear wheel than its predecessors, the final speed unfortunately does not benefit from this due to an early limiter. This is partly due to the speedometer display, which shows a somewhat strong advance. At real 120km/h the speedometer already shows 130km/h.
From a speedometer of 130km/h the on-board electronics regulate consistently.
This is exactly where the new tone-wheel from Kübler Racing comes in. What at first sounds like magic is ultimately simple physics. The new tonewheel has a modified geometry, which means that the exact, real speed is now transmitted to the control electronics. Now the displayed 130km/h are real 130km/h on the road. The speed limiter therefore also takes effect 10km/h later, although the speedometer shows the same amount as before the conversion (130km/h).
Ideally, the higher final speed can be confirmed by a comparison using GPS speed measurement (e.g. via mobile phone) before and after the conversion.
In the stored performance diagram you can see the difference between the speed limiter before and after the conversion.