Parts and equipment for motorcycles, quads, scooters and bicycles

CHOOSE YOUR PEBBLES WELL

GALE PERFORMANCETS INVERTER

The first criterion to take into account to choose the right rollers and the weight:

  • Same weight as original = similar performance
  • Rollers heavier than the original = Increase in torque
  • Rollers less heavy than the original ones = Increase in engine speed
  • It is essential to take rollers of the right size (in mm)

THE GALESTS OF A SCOOTER: WHEN TO CHANGE THEM?

The pebble variator are parts that wear out over time. When they become damaged, they lose material and weight, leading to power losses. Changing the variator rollers is an essential thing to do regularly (every 100/1000 km). On the other hand, if you change the exhaust, you have to lighten the variator. If you notice jolts and if you hear rattling noises from the drive, it's time to think about replacing the rollers. Visually, a worn pebble can be recognized by one of its sides (or several) flats.

THE GALESTS DEPENDING ON THE SCOOTER MODEL

You will find below the weight and size of the original pebbles for most market cc scooters. All you have to do is find the information about yourself and order the set of rollers you need in our shop.

Aprilia

APRILIA ⌵

ModelWeight of the original rollersDimensions of the original rollers
Area 51 2T6,5g15x12
Habana et Mojito 2T7g17x12
Rally 2T6,5g15x12
Scarabeo 2T6,8g15x12
Scarabeo 4T6,5g19x15,5
Sonic 2T6,5g15x12
Sportcity One Street 2T and 4T6,5g19x15,5
SR 2 (before 1995)5,4g15x12
SR 2 (Piaggio)7,519x15,5
SR 2 (Minarelli)5,4g15x12
SR 50 Replica 2000 2 (Aprilia)7g17x12
Baotian

BAOTIAN ⌵

ModelWeight of the original rollersDimensions of the original rollers
Eco Bike 46g16x13
benelli

BENELLI ⌵

ModelWeight of the original rollersDimensions of the original rollers
491 GT (Minarelli) 26,5g15x12
491 Sport (Minarelli) 26,8g15x12
K2 26,8g15x12
Naked 2T6,8g15x12
Pepe 2T6,8g15x12
beta

BETA ⌵

ModelWeight of the original rollersDimensions of the original rollers
ARK 25,4g15x12
Chrono 2T6,5g15x12
Eikon 2T6,8g15x12
Tempo 26,8g15x12
cpi

CPI ⌵

ModelWeight of the original rollersDimensions of the original rollers
Aragon 2T6g15x12
Hussar 2T6g15x12
Oliver 2T6g15x12
Popcorn 2T6g15x12
Derbi

DERBI ⌵

ModelWeight of the original rollersDimensions of the original rollers
Atlantis 2 (before 2003)7g17x12
Atlantis 2T (from 2003)7,5g17x12
Bullet 2T7,5g19x15,5
GP1 27,5g19x15,5
GP1 Open and Revolution 2T6,5g19x15,5
Hunter 2T6,5g17x12
Paddock 2T6,5g17x12
Paddock 2T LC6g17x12
Predator 2T7g17x12
gilera

GILERA ⌵

ModelWeight of the original rollersDimensions of the original rollers
DNA 2T7,5g19x15,5
Easy Moving 28,5g16x13
Ice 27,5g19x15,5
Runner 2T LC7,5g19x15,5
Runner Purejet 2 (before 2006)6,5g19x15,5
Runner Purejet 2 (since 2006)5,5g19x15,5
Runner SP 2 (before 2006)7,5g19x15,5
Runner SP 2T (from 2006)6,5g19x15,5
Stalker 2T7,5g19x15,5
Storm 2T8,5g16x13
Typhoon 2T8,5g16x13
Typhoon X 27,5g19x15,5
honda

HONDA ⌵

ModelWeight of the original rollersDimensions of the original rollers
Bali 2T8,5g16x13
Dio Clean For You 46g16x13
Dio G 28,5g16x13
God SP 2T8,5g16x13
God SR 2T8,5g16x13
God ZX 2T8,5g16x13
SFX 2T9g16x13
SGX Sky 2T5,1g16x13
SH 29g16x13
Shadow 2T8,5g16x13
SXR 2T9g16x13
Vision 2T7,5g16x13
Vision Met In 28,5g16x13
8R 28,5g16x13
8R S 28,5g16x13
Zoomer 4T6g16x13
Italjet

ITALJET ⌵

ModelWeight of the original rollersDimensions of the original rollers
Dragster 2T6,5g15x12
Formula 2T5,5g17x12
Pista 2T6,5g15x12
Scoop 2T6,5g15x12
Torpedo 2T and 4T6,5g15x12
Torpedo New 27,5g19x15,5
Velocifero 2T6g17x12
Yankee 2T6,5g15x12
KEEWAY

KEEWAY ⌵

ModelWeight of the original rollersDimensions of the original rollers
F-Act 24,8g15x12
Goccia 2T6g15x12
Hurricane 2T4,8g15x12
Matrix 2T4,8g15x12
Pixel 2T4,8g15x12
RY8 2T6g15x12
Kymco

KYMCO ⌵

ModelWeight of the original rollersDimensions of the original rollers
Agility 4T6g16x13
CX 2T8,5g16x13
Dink 2T8,5g16x13
Dink 4T6g16x13
DJ X and DJ Y 28,5g16x13
Heroism 2T8,5g16x13
K12 28,5g16x13
People 2T8,5g16x13
People S 4T6g16x13
Sento 4T6g16x13
Sniper 2T7,5g16x13
Super 8 4T6g16x13
Super 9 2T8,5g16x13
Top Boy Cobra 2T8,5g16x13
Malaguti

MALAGUTI ⌵

ModelWeight of the original rollersDimensions of the original rollers
Centro 2T6,8g15x12
Centro 4T6,5g19x15,5
Ciak 4T6,5g19x15,5
Crosser CR1 25,5g17x12
10 26,5g15x12
F10WAP 2T6g15x12
F12 Digit Kat 26,5g15x12
F12 Phantom 2T6,5g15x12
F12 R Aria 26g15x12
F12 R 2 LC6,5g15x12
F15 Firefox 2T6,5g15x12
Yesterday 2T6,5g15x12
Solex brand logo

MBK ⌵

ModelWeight of the original rollersDimensions of the original rollers
Booster NG, Rocket, Spirit 2T6,8g15x12
Booster NG, Rocket, Spirit 2 (euro2)5,4g15x12
Evolis 2T7,2g15x12
Fizz 26,8g15x12
Flipper 2T6,8g15x12
Strong 27,2g15x12
Mach G 2T6,5g15x12
Mach G 2T LC5,4g15x12
Nitro 2T5,4g15x12
Ovetto 2T6,5g15x12
Stunt 2T6,5g15x12
Stunt 2 (euro2)5,4g15x12
Target 26,5g15x12
Peugeot

PEUGEOT ⌵

ModelWeight of the original rollersDimensions of the original rollers
Buxy 2T8,5g16x13
Elyseo 2T9g16x13
Looxor 2T7,5g16x13
Ludix 2T8,9g16x13
Metal-X 29g16x13
Fast 28,5g16x13
Speedake 2T8,5g16x13
Speedfight 2T9g16x13
Speedfight II 2T8g16x13
Squab 2T9g16x13
ST 2T7,5g16x13
SV Geo 28,5g16x13
Trekker 2T8,5g16x13
V-Click 4T6g16x13
Vivacity 2T8,5g16x13
X-Fight 29g16x13
Piaggio

PIAGGIO ⌵

ModelWeight of the original rollersDimensions of the original rollers
Dieses 27,5g19x15,5
Fly 2T7,5g19x15,5
Fly 4T6,5g19x15,5
Free 2 (before 2001)8,5g16x13
Free 4T (from 2001)7,5g19x15,5
Liberty 2T and 4T5,5g19x15,5
NRG 2T LC8,5g16x13
NRG Extreme 2 LC6,5g19x15,5
NRG MC2 2 (before 1998)7g16x13
NRG MC2 2 (since 1998)6,5g19x15,5
NRG MC3 DD et DD 2T7,5g19x15,5
NRG LC Power DD 2T7,5g19x15,5
NRG LC Power Purejet 25,5g19x15,5
NTT 2T8,5g16x13
Quartz 2T8,5g16x13
Sfera 2T8,5g16x13
Typhoon 2T7,5g19x15,5
Zip 2T8,5g16x13
Zip 4T6,5g19x15,5
Zip 2000 2T7,5g19x15,5
Zip Fast Rider 28,5g16x13
Zip SP 2 (before 2001)7g16x13
Zip SP 2T (from 2001)7,5g19x15,5
Suzuki

SUZUKI ⌵

ModelWeight of the original rollersDimensions of the original rollers
Address 2T6,5g17x12
AP 2T6,5g17x12
Estilete 26,5g17x12
Katana 2T6,5g17x12
Sepia 2T6,5g17x12
Street Magic 26,5g17x12
VZillion 2T6,5g17x12
SYM

SYM ⌵

ModelWeight of the original rollersDimensions of the original rollers
DD 2T8,5g16x13
Jet Sports-X SR 2T8,5g16x13
Symply 4T6g16x13
scooter

VESPA ⌵

ModelWeight of the original rollersDimensions of the original rollers
ET2 2 (before 1998)8,5g16x13
ET2 2 (since 2000)7,5g19x15,5
ET4 4T6,5g19x15,5
LX 27,5g19x15,5
LX 46,5g19x15,5
S 2T7,5g19x15,5
S 4T5g19x15,5
Yamaha

YAMAHA ⌵

ModelWeight of the original rollersDimensions of the original rollers
Aerox 2T5,4g15x12
Axis 26,5g15x12
Breeze 26,8g15x12
Bw's 2T6,5g15x12
Bw's NG 26,8g15x12
Bw's 2 (euro2)5,4g15x12
CRZ 26,5g15x12
Giggle 4T6g15x12
Jog R 2T6,5g15x12
Neo's 2T6,5g15x12
Slider 2T5,5g15x12
Spy 26,8g15x12
Vino 26,5g15x12
Why 2T6,5g15x12
Zest 27,2g15x12
quad bike handle diameter

WHAT SIZE FOR YOUR SCABSTS OF VARIATOR?

The dimension of the rollers depends on the type of variator installed on your scooter. Each type of variator has specific roller measurements. To adjust the variation, the weight of the rollers is used so as to be able to perfectly adjust the variation of the scooter to the desired speed.

Too heavy rollers cause the variator to close before the clutch engages.

If they're too light, your engine will rev high, and grind "in a vacuum". On the contrary, if they are too heavy, your engine will rev too low, which will instantly affect performance.

Hint: if you have an acceleration hole between 30 and 50 km/h on an original scooter (cylinder level) your rollers are too heavy!

You can also check that your belt goes up to the top of your drive. Tracez a line at the marker from the center to the outside of your dimmer, take a spin and see if it has faded enough!

It is therefore advisable to choose them carefully, adjusting their weight according to the engine configuration of your scooter.


2 dimensions to remember:

  • - Ø 15 x12mm for MINARELLI engine ( Booster / Nitro / Malaguti...)
  • - Ø 16 x 13mm for PEUGEOT and PIAGGIO engines ( and for S3R variators)

The total weight ranges from 21g to 48g (3.5g to 8g/roller).


There are several kinds of pebbles (heavy, medium and light). The pebbles are spread par weight:

  • - 100 g to 100 g for acceleration
  • - 100 g to 100 g for balance
  • - 100g to 100g for speed

The difference in weight between the heaviest and the lightest roller should not be too great.

WHAT ROLE DO GALES PLAY?TS ON A SCOOTER?

To fully understand the role of the rollers on a scooter, you must first explain how the variator. On a scooter, it serves as a sort of gearbox. In fact, the driver of a scooter does not change gears, they change according to the engine speed thanks to the variator which is responsible for changing the reduction ratio of the transmission during acceleration.

In practice, the drive consists of:

  • With a fixed cheek
  • A movable cheek in which there are 3 or 6 rollers. There are several types of pebbles (heavy, medium and light)

When the scooter is started, the motor drives the variator and the running of the belt. The higher the motor rotation speed, the faster the drive rotates. The rollers then move away from the inside towards the outside of the mobile wheel. Thanks to the force centrifugal, the rollers then cause the displacement of the movable flange (it approaches the fixed flange) which changes the race of the belt (with a higher radius). This is what allows the scooter to 'automatically' shift gears.

scooter roller

CONCLUSION

To choose the right rollers for your machine, you need to consider their weight and size. There are adjustable pebble boxes which will simplify the adjustment of the rollers.

Remember to consult our tutorials videos and writings on the replacement of the variator, In theclutch and belt for scooters. We offer a large selection of pebble madear different brands like Polini, Top Performances, Artek. Each brand offers rollers of different sizes and several weights in order to find the best ones for your scooter.

Pebble selection criteria:

- Engine characteristics

- Choice of weight and size

- Replacement of the originally defective part or for an increase in performance.

Replacing the rollers is a long operation which requires rigor and precision.

To obtain a smooth ride, it is advisable to mount the recommended rollers.ar the constructor.

The weight of the rollers will make it possible to increase the rotational power of the crankshaft.

Heavy rollers are often used to increase the top speed of a stock scooter.


Adjusting your scooter variator and clutch

To fully understand the operating system of the variator, it is also necessary to study that of the clutch car they work together.

To sum up, let's take the example of the bicycle!

Let's imagine that the variator is the crankset and the clutch is the rear rim sprockets.

The variator consists of a barrel, a cheek, a flange, three sliders, and 3 or 6 rollers.

Medium-heavy pulleys are used for fully stock scooters with a medium-soft, long enough clutch spring.

The weight of the pebbles will give more force to the variator (which compensates for the lack of motor power) which will open faster than with medium or light rollers when rotating during acceleration.

The weight of the rollers will make it possible to increase the rotational power of the crankshaft.

Heavy rollers are often used to increase the top speed of a stock scooter.

A scooter with excessive power must be regulated with a flexible and short clutch spring and ultra-light rollers or even put only three rollers in the variator!

Above all, do not mount a hard spring in your clutch, otherwise you will break your transmission belt every week! Why ?

Your scooter being powerful and equipped with a hard spring, the belt undergoes enormous pressure between the variator and the clutch and ends up falling off.ar to break !


Tuning Techniques

To start, choose your clutch spring and the three small springs according to the power of your scooter (see above) then mount them on your clutch.

Then, get plenty of pebbles to test all the possibilities.

Does your scooter grind seriously but it does not move forward?

Your variator is not loaded enough, slightly increased the weight of the rollers.

Your scooter has lost all its energy and can no longer start off?

Don't panic, you just need to lighten your drive.

Your scooter is going well, then it's the hole at 40 Km/h?

You need to change your clutch spring par another stiffer or lighter your drive.

The variator/clutch settings are quite difficult and require a lot of patience!


HERE 100% OF THE PARTS INDICATED IN STOCK REALLY ARE!