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Polini Variator "Hi-Speed" Yamaha BW's / Slider

Polini Item no.: U241.671

Polini Variator "Hi-Speed" Yamaha BW's / Slider



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Data Sheet
Suitable for (32)


Racing variator "Hi-Speed" by Polini.

It comes with 16x13mm roller weights and a reinforced torque spring. Basically the improved successor of Polini's famous "Speed Control".

As it was developed to be used with the original torque drive, it has a "small" outside diameter and has to be used with a standard (preferably reinforced) drive belt. The angles of mobile pulley and ramp plate were designed to improve acceleration.

Best used with a sports exhaust, 50cc sports to mid-race configuration.

Data Sheet

Name Polini Variator "Hi-Speed" Yamaha BW's / Slider
Item No. U241.671
Brand Polini
Range Standard

Your product goes with the following manufacturers and their models:

Adly (Her Chee)

Rapido 50cc


Amico 50cc AC (1991 - 1992)

Amico 50cc ac (after 1993)

Amico GL 50cc AC

Amico Sport 50cc AC

SR 50cc AC (before 1994) - Minarelli vertical


Pista 2 50cc AC

Pista 50cc AC

Scoop 50cc


Booster 50cc AC (1992 - 1999)

Booster 50cc AC (after 2004)

Booster Next 50cc AC (after 1999)

Booster Next 50cc AC (before 1999)

Booster One 50cc until 2013

Booster Rocket 50cc AC

Booster Spirit 50cc AC (before 2004)

Booster Track 50cc AC

Stunt 50cc AC

Stunt 50cc AC CAT (after 2004)

Stunt Naked 50cc AC


BW's 50cc AC

BW's 50cc AC (after 2004)

BW's Bump 50cc AC

BW's Easy 50cc 2013

BW's NG 50cc AC (after 1999)

BW's NG 50cc AC (before 1999)

Slider 50cc AC (before 2004)

Slider 50cc AC CAT (after 2004)

Spy 50cc AC

Target 50cc

Zuma 50cc AC

Zuma II 50cc AC

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