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CVT and Drive Belts

(420 products)
Scooter Variators CVT Kits CVT Weights Drive Belts Pulleys CVT Accessories
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Bushings & Spacers CVT CVT accessories CVT boss CVT cover CVT kit CVT restriction CVT sliders CVT weights Kickstarter accessories Pulley Ramp plate Repair / maintenance kit V-belt Washer CVT shim Kickstart gear Kickstart washer Nut
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2Fast Airsal Aprilia Athena Bando Dayco Doppler GY6 Malossi MotoForce MotoForce Racing Naraku Peugeot Piaggio Polini RMS Stage6 Stage6 R/T Standard Parts Top Performances Yamaha
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Stage6 R/T
Drive Kit CVT / Clutch Stage6 R/T Oversize XL Piaggio short
Article no.: S6-5614007

Drive Kit CVT / Clutch Stage6 R/T Oversize XL Piaggio short

688,50 €
Currently not in stock
765,00 €
-10% Set-Rabatt
Stage6 R/T
Drive Kit CVT / Clutch Stage6 R/T Oversize XL Piaggio long
Article no.: S6-5614006

Drive Kit CVT / Clutch Stage6 R/T Oversize XL Piaggio long

672,30 €
Currently not in stock
747,00 €
-10% Set-Rabatt
Stage6 R/T
CVT / Clutch Oversize Stage6 R/T Minarelli / China 2-stroke
Article no.: S6-5616603
1

CVT / Clutch Oversize Stage6 R/T Minarelli / China 2-stroke

688,50 €
Currently not in stock
765,00 €
-10% Set-Rabatt
MotoForce Racing
CVT + Clutch Motoforce Racing Minarelli long / Aerox
Article no.: MS-PKMMFVARMINA
1

CVT + Clutch Motoforce Racing Minarelli long / Aerox

71,55 €
Currently not in stock
RRP
83,00 €
-14% Discount
MotoForce Racing
CVT Kit MotoForce Racing Piaggio short after 1998
Article no.: MF75.14019

CVT Kit MotoForce Racing Piaggio short after 1998

96,53 €
Currently not in stock
98,50 €
-2% Set-Rabatt
MotoForce Racing
CVT Kit 729mm MotoForce Racing GY6 12 inch
Article no.: MF75.13912

CVT Kit 729mm MotoForce Racing GY6 12 inch

69,58 €
Currently not in stock
71,00 €
-2% Set-Rabatt
MotoForce Racing
CVT Kit 669mm MotoForce Racing GY6 10 inch
Article no.: MF75.13911

CVT Kit 669mm MotoForce Racing GY6 10 inch

66,64 €
Currently not in stock
68,00 €
-2% Set-Rabatt
MotoForce Racing
CVT Kit + Clutch MotoForce Racing Piaggio short after 1998
Article no.: MF75.14018

CVT Kit + Clutch MotoForce Racing Piaggio short after 1998

169,54 €
Currently not in stock
173,00 €
-2% Set-Rabatt
MotoForce Racing
CVT Kit + Clutch MotoForce Racing Peugeot
Article no.: MF75.17512

CVT Kit + Clutch MotoForce Racing Peugeot

151,90 €
Currently not in stock
155,00 €
-2% Set-Rabatt
MotoForce Racing
CVT Kit + Clutch MotoForce Racing Minarelli
Article no.: MF75.16611

CVT Kit + Clutch MotoForce Racing Minarelli

147,49 €
Currently not in stock
150,50 €
-2% Set-Rabatt
MotoForce Racing
CVT Kit + Clutch MotoForce Racing CPI / Keeway (13mm)
Article no.: MF75.19012

CVT Kit + Clutch MotoForce Racing CPI / Keeway (13mm)

154,35 €
Currently not in stock
157,50 €
-2% Set-Rabatt
MotoForce Racing
CVT Kit + Clutch MotoForce Racing CPI / Keeway (16mm)
Article no.: MF75.19013

CVT Kit + Clutch MotoForce Racing CPI / Keeway (16mm)

150,43 €
Currently not in stock
153,50 €
-2% Set-Rabatt
MotoForce Racing
CVT Kit + Clutch MotoForce Racing Piaggio long 1998 - 2010
Article no.: MF75.14016

CVT Kit + Clutch MotoForce Racing Piaggio long 1998 - 2010

161,70 €
Currently not in stock
165,00 €
-2% Set-Rabatt
MotoForce Racing
CVT Boss + Shims Motoforce Racing Yamaha Aerox
Article no.: MF60.16633

CVT Boss + Shims Motoforce Racing Yamaha Aerox

16,11 €
Currently not in stock
17,90 €
-10% Set-Rabatt
Polini
CVT Variator Polini Hi-Speed Evo 2 16mm - 12,5° Piaggio
Article no.: U241.749

CVT Variator Polini Hi-Speed Evo 2 16mm - 12,5° Piaggio

136,00 €
Currently not in stock
RRP
160,00 €
-15% Discount
Polini
CVT Variator Polini Hi Speed Evo 2 Minarelli long / Aerox
Article no.: U241.752

CVT Variator Polini Hi Speed Evo 2 Minarelli long / Aerox

136,00 €
Currently not in stock
RRP
160,00 €
-15% Discount
Polini
CVT Variator Polini Hi Speed Evo 2 16mm Piaggio
Article no.: U241.751

CVT Variator Polini Hi Speed Evo 2 16mm Piaggio

136,00 €
Currently not in stock
RRP
160,00 €
-15% Discount
Polini
CVT Variator Polini Hi Speed Evo 2 16mm Minarelli / Aerox
Article no.: U241.753

CVT Variator Polini Hi Speed Evo 2 16mm Minarelli / Aerox

136,00 €
Currently not in stock
RRP
160,00 €
-15% Discount
Malossi
CVT Variator Malossi Multivar Peugeot Speedfight 3 50cc 4T
Article no.: M5114206

CVT Variator Malossi Multivar Peugeot Speedfight 3 50cc 4T

91,00 €
Currently not in stock
Polini
CVT Variator Polini Hi Speed Evo 2 Piaggio
Article no.: U241.750
1

CVT Variator Polini Hi Speed Evo 2 Piaggio

136,00 €
Currently not in stock
RRP
160,00 €
-15% Discount
Standard Parts
CVT Boss 20x12,8x38,5mm Peugeot
Article no.: MF60.17505

CVT Boss 20x12,8x38,5mm Peugeot

5,70 €
Currently not in stock
Polini
CVT Kit Polini Hi-Speed Kymco Agility 50cc 4T Euro 4
Article no.: U241.745

CVT Kit Polini Hi-Speed Kymco Agility 50cc 4T Euro 4

98,50 €
Currently not in stock
RRP
115,00 €
-14% Discount
Standard Parts
Variator Weight Tuning Kit 19x15mm x6
Article no.: MF56.19000

Variator Weight Tuning Kit 19x15mm x6

33,50 €
Currently not in stock
Polini
V-Belt Polini Original Piaggio TPH after 2011 / Scarabeo / Liberty
Article no.: U248.056

V-Belt Polini Original Piaggio TPH after 2011 / Scarabeo / Liberty

27,00 €
Currently not in stock
RRP
31,00 €
-13% Discount
Piaggio
CVT Variator 19x15,5mm Piaggio 50cc
Article no.: OE-PIACM110301

CVT Variator 19x15,5mm Piaggio 50cc

58,50 €
Currently not in stock
Naraku
CVT Boss Naraku 13x18x37mm Minarelli 2-stroke
Article no.: NK800.05

CVT Boss Naraku 13x18x37mm Minarelli 2-stroke

7,40 €
Currently not in stock
7,50 €
-1% Discount
Naraku
CVT Boss Naraku Speed-Up Kit 20x38mm GY6 / Kymco 2T / 4T
Article no.: NK800.04

CVT Boss Naraku Speed-Up Kit 20x38mm GY6 / Kymco 2T / 4T

9,00 €
Currently not in stock
Naraku
CVT Boss Naraku Speed-Up Kit 16mm – 21x37mm CP
Article no.: NK800.06

CVT Boss Naraku Speed-Up Kit 16mm – 21x37mm CP

6,50 €
Currently not in stock
Standard Parts
Half Pulley / Fan Wheel Sym / Peugeot 50cc 4-stroke
Article no.: 34138

Half Pulley / Fan Wheel Sym / Peugeot 50cc 4-stroke

11,50 €
Currently not in stock
Standard Parts
CVT Pulley / Fanwheel PGO New Models
Article no.: 28837
1

CVT Pulley / Fanwheel PGO New Models

14,00 €
Currently not in stock
Naraku
Drive Belt Naraku V/S 787mm Minarelli 2 stroke - 4 stroke
Article no.: NK901.04

Drive Belt Naraku V/S 787mm Minarelli 2 stroke - 4 stroke

16,00 €
Currently not in stock
RRP
20,00 €
-20% Discount
Naraku
Drive Belt Naraku V/S 1E40QMB 788mm
Article no.: NK901.10

Drive Belt Naraku V/S 1E40QMB 788mm

20,00 €
Currently not in stock
Naraku
V-Belt Naraku Kymco / Sym horizontal 738x18x28mm
Article no.: NK900.08

V-Belt Naraku Kymco / Sym horizontal 738x18x28mm

15,50 €
Currently not in stock
Naraku
Drive Belt Naraku type 1E40QMB 788mm
Article no.: NK901.11

Drive Belt Naraku type 1E40QMB 788mm

13,50 €
Currently not in stock
Standard Parts
Restrictor Ring 20x25x3mm Piaggio / China 4-stroke
Article no.: L-SP92615

Restrictor Ring 20x25x3mm Piaggio / China 4-stroke

3,20 €
Currently not in stock
Polini
CVT Variator Polini Hi Speed Peugeot / Sym 50cc 4T
Article no.: U241.704

CVT Variator Polini Hi Speed Peugeot / Sym 50cc 4T

73,00 €
Currently not in stock
RRP
86,00 €
-15% Discount
Naraku
V-Belt Naraku V/S 788mm GY6 4-stroke 13"
Article no.: NK900.55

V-Belt Naraku V/S 788mm GY6 4-stroke 13"

17,00 €
Currently not in stock
Standard Parts
Drive Belt Motoforce Morini / Suzuki Katana before 1999
Article no.: MF72.00008

Drive Belt Motoforce Morini / Suzuki Katana before 1999

21,50 €
Currently not in stock
23,00 €
-7% Discount
Polini
Drive Belt Polini Evo Piaggio before 1998 short
Article no.: U248.031

Drive Belt Polini Evo Piaggio before 1998 short

35,50 €
Currently not in stock
RRP
41,00 €
-13% Discount
Polini
Fanwheel Polini Air Speed Piaggio / Minarelli
Article no.: U246.032

Fanwheel Polini Air Speed Piaggio / Minarelli

9,40 €
Currently not in stock
RRP
10,00 €
-6% Discount
Polini
Plastic fanwheel / pulley Polini 244.110 Piaggio
Article no.: U246.030

Plastic fanwheel / pulley Polini 244.110 Piaggio

6,50 €
Currently not in stock
RRP
7,20 €
-10% Discount
Polini
CVT Variator Polini Hi-Speed, Honda Vision, 4-stroke
Article no.: U241.698

CVT Variator Polini Hi-Speed, Honda Vision, 4-stroke

69,00 €
Currently not in stock
RRP
81,00 €
-15% Discount
Peugeot
CVT Boss Peugeot vertical/horizontal
Article no.: OE-PEU75678600

CVT Boss Peugeot vertical/horizontal

17,00 €
Currently not in stock
Peugeot
CVT Restrictor Ring 45 km/h Peugeot horizontal
Article no.: OE-PEU76147200

CVT Restrictor Ring 45 km/h Peugeot horizontal

8,80 €
Currently not in stock
GY6
Fan Wheel (front pulley) GY6 139QMB/QMA / Kymco 4T
Article no.: OE-GY6BT12019

Fan Wheel (front pulley) GY6 139QMB/QMA / Kymco 4T

2,20 €
Currently not in stock
Aprilia
Washer Front Pulley Minarelli / China 2T
Article no.: OE-AP8206702

Washer Front Pulley Minarelli / China 2T

4,50 €
Currently not in stock
Naraku
CVT Naraku Sport Kymco / Sym
Article no.: NK900.89

CVT Naraku Sport Kymco / Sym

46,00 €
Currently not in stock
Naraku
CVT Variator Naraku Sport Kymco 2T, Sym 2T
Article no.: NK900.88
1

CVT Variator Naraku Sport Kymco 2T, Sym 2T

48,50 €
Currently not in stock
Naraku
CVT Boss derestricted 20x38mm GY6 139 QMB/QMB / Kymco horizontal
Article no.: NK800.03

CVT Boss derestricted 20x38mm GY6 139 QMB/QMB / Kymco horizontal

7,20 €
Currently not in stock
Naraku
V-Belt Naraku V/S Kymco Top Boy Cobra Dink Super8 4T Sym
Article no.: NK900.03

V-Belt Naraku V/S Kymco Top Boy Cobra Dink Super8 4T Sym

16,00 €
Currently not in stock
Naraku
Drive belt Naraku Adly/HerChee, 17x878mm
Article no.: NK901.00

Drive belt Naraku Adly/HerChee, 17x878mm

24,00 €
Currently not in stock
Standard Parts
Drive Belt Kymco / SYM 736X18X9.1
Article no.: MF72.00007

Drive Belt Kymco / SYM 736X18X9.1

26,00 €
Currently not in stock
Standard Parts
Drive Belt Motoforce Suzuki Katana after 1999
Article no.: MF72.00006

Drive Belt Motoforce Suzuki Katana after 1999

18,00 €
Currently not in stock
Piaggio
V-Belt original Piaggio TPH after 2011 / Scarabeo / Liberty
Article no.: OE-PIA82712R

V-Belt original Piaggio TPH after 2011 / Scarabeo / Liberty

30,50 €
Currently not in stock
35,00 €
-13% Discount
Malossi
CVT Overrange Malossi MHR Furia Rossa Minarelli long / Aerox
Article no.: M6115821
4

CVT Overrange Malossi MHR Furia Rossa Minarelli long / Aerox

491,00 €
Currently not in stock
Malossi
CVT Kit Overrange Malossi MHR La Furia Rossa Piaggio long
Article no.: M6115781
1

CVT Kit Overrange Malossi MHR La Furia Rossa Piaggio long

462,00 €
Currently not in stock
RRP
521,00 €
-11% Discount
Naraku
CVT Variator Sport Naraku Morini
Article no.: NK900.92

CVT Variator Sport Naraku Morini

48,00 €
Currently not in stock
Piaggio
CVT Boss Piaggio NRG / Typhoon after 1998
Article no.: OE-PIA480230

CVT Boss Piaggio NRG / Typhoon after 1998

30,50 €
Currently not in stock
Malossi
CVT Variator Malossi Multivar Piaggio / Vespa 50ccm 4T
Article no.: M5111597

CVT Variator Malossi Multivar Piaggio / Vespa 50ccm 4T

88,00 €
Currently not in stock
RRP
94,00 €
-6% Discount
Polini
Pulley Air Speed Polini Evolution 3 Piaggio NRG / Runner
Article no.: U244.0123

Pulley Air Speed Polini Evolution 3 Piaggio NRG / Runner

80,00 €
Currently not in stock
RRP
91,00 €
-12% Discount
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Scooter CVT transmission

A scooter's CVT operates with three main components: the variator (front pulley), the drive belt, and the torque driver (rear pulley).

As an evolution of the drive systems found on classic mopeds, this system is more sophisticated and powerful. Naturally, it must be perfectly tuned to ensure optimal power transfer to the rear wheel.

Together with the centrifugal clutch, the CVT forms a continuously variable transmission (CVT) that provides smooth acceleration without shifting jolts.

How a Scooter CVT Works:

Variator:

A variator allows the gear ratio to be adjusted automatically and variably depending on engine speed. Although systems may differ in detail, the principle remains the same:

  • The variator is mounted directly on the crankshaft, meaning it rotates at the same speed as the engine.
  • It consists of a fixed and a movable pulley, with the drive belt running in between. These pulleys are conically shaped.
  • The movable part contains variator weights: small cylindrical components or rollers that are pushed outward by centrifugal force, thereby moving the pulley.
  • Since the drive belt is wedged between the two conical pulleys, it is forced to slide upward. This changes the gear ratio and the speed of the driven parts (similar to a sprocket on a motorcycle: the larger it is, the higher the top speed).

CVT Weights (rollers)

Heavier weights cause the variator to open more slowly, while lighter weights make it open faster. Adjusting the CVT weights is essential after any modifications that affect engine power to achieve proper power delivery.

With every engine modification, the weight should be adjusted. Various tuning kits are available to find the ideal setup.

Drive Belt:

The belt simply provides the connection between the variator at the front and the torque driver at the rear. It slides from the inside to the outside on the variator pulleys to vary the speed.

This raises a question: if the belt rises higher on the variator, doesn't it become too short? How is this length compensated for? You will find the answer here ↓

Torque Driver (Rear Pulley):

To compensate for the movement of the belt and the required length, manufacturers install a torque driver. This is the rear counterpart to the front variator unit, which, like the variator, features a fixed and a movable pulley. During acceleration, the drive belt pushes the pulleys apart to move inward. When letting off the throttle, the torque spring pushes the movable pulley back together so the drive belt can return to its starting position.

Contra springs, like rollers, are available in different strengths (stiffness levels). It is important to choose a version that matches the engine performance.

Sport and Racing CVT: Optimized Ramp Angles and Larger Diameter

To adapt the gear ratio to the power of the respective engine, manufacturers have optimized the variator elements as much as possible: different weights, various torque spring strengths, different roller diameters, and ramp angles. As you can see, the possibilities are very diverse.

Sport CVT: Standard Range

Whether you choose a sport cylinder or stay with the original 50cc, a sport variator with a standard diameter is usually sufficient. The optimized ramps are perfectly adequate for bringing moderate power increases to the road.

Racing CVT: Oversize Range

When a scooter engine is more heavily tuned, for example with a racing or high-end cylinder from 70cc upward, the working range of the standard variator often becomes too small. The engine then has significantly more torque and power, which can only be fully utilized with the help of pulleys with increased diameters (oversize).

This results in both better acceleration and a higher top speed.

All well-known racing brands offer such systems: Stage6 R/T Oversize, Malossi Overrange, Polini Evolution, etc.

ATTENTION: Only a sufficiently powerful engine will work correctly with this type of variator, so stay away from oversize CVTs for standard setups!

Scooter Variators in Our Shop

In our online shop, you will find all types of CVTs and CVT accessories. Sport and racing variators from popular brands like Malossi, Polini, Stage6 and Stage6 R/T as well as standard variators for original-style repairs. Of course, we also carry a large selection of drive belts (original or reinforced), weights, torque springs, shims, torque drivers, and even complete CVT kits!

Naturally, we have all parts in stock for the most common models with Piaggio, Minarelli, Peugeot, or Morini engines, such as for the Piaggio Zip, MBK Booster, Peugeot Kisbee, Suzuki Katana, and many more!

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