Variator set BGM ORIGINAL V2 Piaggio 250-300 ccm Quasar GTS250 GTS300 GTV300 GTS i.e.Super

BGM PRO Vario kit with extra-long transmission range, perfect pull and high rear-wheel power.

The BGM Vario uses a shorter (Kevlar-reinforced) V-belt than is usual for the Quasar engines. This allows the BGM to run a much wider range of ratios without the V-belt grazing the case, as is the case with a Malossi Vario, for example. As a result, the BGM Vario can translate significantly further, without the engine having to turn higher. A huge advantage, especially when the engine is further tuned. With the stock variator, the engine reaches the limiter significantly earlier. The power is therefore maintained much longer along the speed axis, which is noticeable in a higher top speed.

Countless dyno and road tests have shown that the 250/300cc Quasar engines do not require a harder or different back-pressure spring than the stock one. The entire engine power is therefore not lost as frictional heat but ends up where it belongs: on the rear wheel.

Compared to the Polini set, the BGM Vario does not work at an artificially increased speed level to create an aha effect. The Polini Vario unfortunately achieves its (too) high speed level with worse efficiency.

Maintaining the same acceleration speed as the stock engine means that the BGM Vario does not put more load on the engine and power delivery is pleasantly linear. In everyday use, the superiority of the BGM Vario becomes clear in a direct 1:1 comparison.

Scope of delivery

• variator
• front pulley
• V-belt: aramid reinforced (Bando)
• Weights:
• 21x17mm 11,5g (250cc)
• 21x17mm 13,5g (300cc)
• Spacers for pulley: between bush and front pulley 1x 1,3mm, 1x 1,0mm
• (both washers must be mounted)
• Spacer washer for pulley: between fixing nut and front pulley 1x 1,0mm

NOTE: The drive train of the Piaggio Quasar engines (as installed in Vespa GTS models) tends to rattle when idling. In this case, under certain load conditions, the V-belt easily hits the guide pulley. Piaggio positioned it exactly for this reason, to prevent the upper and lower sections of the V-belt from touching each other. Many new vehicles therefore produce these perceptible but harmless noises.
After installing a Sportvario from Polini (P241719) or BGM (BGM2311V2), both of which work with a changed V-belt and thus a somewhat steeper angle of the belt section, slight noise may likewise occur at idle or under light load. The noises are technically completely harmless and do not represent a defect.