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Axle other Chain Chain accessories Chain guard Chain guide Chain kit Chain master link Chain roller Chain slider Chain tensioner Chassis screws Circlip Clutch accessories Clutch kit Crankshaft accessories CVT sliders Engine case accessories Engine cover Front sprocket Gearbox Gearbox accessories Gearbox bearing kit Gearshift lever Ignition lock Kickstarter accessories Oil seal kit Piston pin bearing Pulley Pulley gear Chain rear sprocket Repair kit Screw kit Screws other Tank accessories Transmission Transmission accessories Transmission gear Washer Wheel axle Woodruff key
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AFAM Algi Aprilia Avoc Beta Bidalot Buzzetti Conti CPI D.I.D Derbi Doppler GY6 Hot Rods IGM Iris Italjet Jasil KMC KRM Kymco Malossi Moose Racing Moto Master MotoForce MotoForce Racing Peugeot Piaggio Polini Polisport Pro Circuit Prox Renthal RFX Rieju RMS Scar Schmitt Stage6 Stage6 R/T Standard Parts STR8 Swiing Top Performances UFO Voca Racing Volt Racing Yamaha YCF YCF Factory
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Standard Parts
Idler Gear 34 teeth 3rd / 4th gear Simson
Article no.: MOF-41424

Idler Gear 34 teeth 3rd / 4th gear Simson

26,00 €
Ready for dispatch shortly
Standard Parts
Fixed Gear 16 teeth 2nd gear 4-speed Simson
Article no.: MOF-41423

Fixed Gear 16 teeth 2nd gear 4-speed Simson

12,50 €
Ready for dispatch shortly
Standard Parts
Fixed Gear 19 teeth 3rd gear 4-speed Simson
Article no.: MOF-41422

Fixed Gear 19 teeth 3rd gear 4-speed Simson

13,00 €
Ready for dispatch shortly
Standard Parts
Idler Gear 44 teeth 1st gear 4-speed Simson
Article no.: MOF-41421

Idler Gear 44 teeth 1st gear 4-speed Simson

19,50 €
Ready for dispatch shortly
Standard Parts
Washer / Shim gearbox 24x35x1.2mm Simson
Article no.: MOF-41410

Washer / Shim gearbox 24x35x1.2mm Simson

2,50 €
Ready for dispatch shortly
Standard Parts
Swivel Fork draw key shaft Simson
Article no.: MOF-41405

Swivel Fork draw key shaft Simson

15,50 €
Ready for dispatch shortly
Standard Parts
Shift Drum 3-speed Simson
Article no.: MOF-41387

Shift Drum 3-speed Simson

26,00 €
Ready for dispatch shortly
Standard Parts
Draw Key output shaft 3- / 4-speed Simson
Article no.: MOF-41386

Draw Key output shaft 3- / 4-speed Simson

7,10 €
Ready for dispatch shortly
Standard Parts
Locking Washer clutch basket large Simson
Article no.: MOF-41385

Locking Washer clutch basket large Simson

0,60 €
Ready for dispatch shortly
Standard Parts
Locking Washer primary gear nut Simson
Article no.: MOF-41365

Locking Washer primary gear nut Simson

0,60 €
Ready for dispatch shortly
Standard Parts
Drive Shaft Spring Simson
Article no.: MOF-41354

Drive Shaft Spring Simson

8,10 €
Ready for dispatch shortly
Standard Parts
Spring gear shift drum lock lever 24mm Simson
Article no.: MOF-41353

Spring gear shift drum lock lever 24mm Simson

3,30 €
Ready for dispatch shortly
Standard Parts
Idler Gear 34 teeth 3rd gear 3-speed Simson
Article no.: MOF-41344

Idler Gear 34 teeth 3rd gear 3-speed Simson

26,00 €
Ready for dispatch shortly
Standard Parts
Sealing Cap drive shaft Simson
Article no.: MOF-41343

Sealing Cap drive shaft Simson

7,10 €
Ready for dispatch shortly
Standard Parts
Bearing Bolt speedometer cable Motor Simson
Article no.: MOF-41340

Bearing Bolt speedometer cable Motor Simson

1,90 €
Ready for dispatch shortly
Standard Parts
Slotted Nut gear adjustment Simson
Article no.: MOF-41335

Slotted Nut gear adjustment Simson

4,00 €
Ready for dispatch shortly
Standard Parts
Idler Gear 29 teeth 4th gear 4-speed Simson
Article no.: MOF-41304

Idler Gear 29 teeth 4th gear 4-speed Simson

7,50 €
Ready for dispatch shortly
Standard Parts
Fixed Gear 27 teeth 4th gear Simson
Article no.: MOF-41303

Fixed Gear 27 teeth 4th gear Simson

7,50 €
Ready for dispatch shortly
Standard Parts
Idler Gear 30 teeth 4th gear 4-speed Simson
Article no.: MOF-41294

Idler Gear 30 teeth 4th gear 4-speed Simson

30,00 €
Ready for dispatch shortly
Standard Parts
Fixed Gear 26 teeth 4th gear Simson
Article no.: MOF-41293

Fixed Gear 26 teeth 4th gear Simson

25,00 €
Ready for dispatch shortly
Standard Parts
Front Sprocket 18 teeth 1/2x5.4 Simson
Article no.: MOF-40813

Front Sprocket 18 teeth 1/2x5.4 Simson

5,30 €
Ready for dispatch shortly
Standard Parts
Front Sprocket 12 teeth 1/2x5.4 Simson
Article no.: MOF-40807

Front Sprocket 12 teeth 1/2x5.4 Simson

5,30 €
Ready for dispatch shortly
Standard Parts
Rear Sprocket 34 teeth Simson
Article no.: MOF-40806

Rear Sprocket 34 teeth Simson

34,50 €
Ready for dispatch shortly
Standard Parts
Rear Sprocket 40 teeth (Chain 415) 6-hole Puch Ms / Mv / Vs
Article no.: MOF-40196

Rear Sprocket 40 teeth (Chain 415) 6-hole Puch Ms / Mv / Vs

16,00 €
Ready for dispatch shortly
Standard Parts
Rear Sprocket 31 teeth Puch Ms 50 / Mv 50 / Vs 50
Article no.: MOF-39847

Rear Sprocket 31 teeth Puch Ms 50 / Mv 50 / Vs 50

15,00 €
Ready for dispatch shortly
Standard Parts
Gear Shift Lever chrome Simson
Article no.: MOF-39577

Gear Shift Lever chrome Simson

11,00 €
Ready for dispatch shortly
Standard Parts
Gear Selector Shaft 5-speed Zündapp
Article no.: MOF-28807

Gear Selector Shaft 5-speed Zündapp

103,00 €
Ready for dispatch shortly
AFAM
Chain Kit Afam MX5 (ultra-light self-cleaning rear sprocket) KTM SX 250
Article no.: 48013233

Chain Kit Afam MX5 (ultra-light self-cleaning rear sprocket) KTM SX 250

146,00 €
Ready for dispatch shortly
AFAM
Chain Kit Afam MX5 14/50 KTM SX 250
Article no.: 48013231

Chain Kit Afam MX5 14/50 KTM SX 250

148,00 €
Ready for dispatch shortly
AFAM
Chain Kit Afam 415 type F (ultra-light self-cleaning rear sprocket) KTM SX 50
Article no.: 48012999

Chain Kit Afam 415 type F (ultra-light self-cleaning rear sprocket) KTM SX 50

59,00 €
Ready for dispatch shortly
AFAM
Chain Kit Afam 520 MR2 TM 12/49 ultra-light rear sprocket
Article no.: 48011991

Chain Kit Afam 520 MR2 TM 12/49 ultra-light rear sprocket

126,00 €
Ready for dispatch shortly
AFAM
Chain Kit Afam 520 MR2 KTM 13/48
Article no.: 48011978

Chain Kit Afam 520 MR2 KTM 13/48

122,00 €
Ready for dispatch shortly
AFAM
Chain Kit Afam 520 MR2 KTM 14/48
Article no.: 48011974

Chain Kit Afam 520 MR2 KTM 14/48

124,00 €
Ready for dispatch shortly
AFAM
Chain Kit Afam 520 MR2 KTM 14/50
Article no.: 48011961

Chain Kit Afam 520 MR2 KTM 14/50

127,00 €
Ready for dispatch shortly
AFAM
Chain Kit Afam 520 MR2 SX 250 13/50 self-cleaning rear sprocket
Article no.: 48011947

Chain Kit Afam 520 MR2 SX 250 13/50 self-cleaning rear sprocket

130,00 €
Ready for dispatch shortly
AFAM
Chain Kit Afam 520 MR2 YZ 125 13/50 original 1993
Article no.: 48011606

Chain Kit Afam 520 MR2 YZ 125 13/50 original 1993

107,00 €
Ready for dispatch shortly
AFAM
Chain Kit Afam 520 MR2 YZ 125 13/50 original 1995
Article no.: 48011599

Chain Kit Afam 520 MR2 YZ 125 13/50 original 1995

106,00 €
Ready for dispatch shortly
AFAM
Chain Kit Afam 520 MR2 RM 125 12/49 original 1994-1996
Article no.: 48011467

Chain Kit Afam 520 MR2 RM 125 12/49 original 1994-1996

105,00 €
Ready for dispatch shortly
AFAM
Chain Kit Afam 520 MR2 RM 250 13/49 original 1993
Article no.: 48011466

Chain Kit Afam 520 MR2 RM 250 13/49 original 1993

109,00 €
Ready for dispatch shortly
AFAM
Chain Kit Afam 520 MR2 RM 250 13/50
Article no.: 48011455

Chain Kit Afam 520 MR2 RM 250 13/50

104,00 €
Ready for dispatch shortly
AFAM
Chain Kit Afam 520 MR2 RM 125 12/49 original 1992-1993
Article no.: 48011445

Chain Kit Afam 520 MR2 RM 125 12/49 original 1992-1993

107,00 €
Ready for dispatch shortly
AFAM
Chain Kit Afam 520 MR2 RM 125 13/51 ultra-light rear sprocket
Article no.: 48011442

Chain Kit Afam 520 MR2 RM 125 13/51 ultra-light rear sprocket

108,00 €
Ready for dispatch shortly
AFAM
Chain Kit Afam 520 MR2 RM 250 13/49
Article no.: 48011436

Chain Kit Afam 520 MR2 RM 250 13/49

107,00 €
Ready for dispatch shortly
AFAM
Chain Kit Afam 520 MR2 RM 250 13/49 original 1994-1996
Article no.: 48011434

Chain Kit Afam 520 MR2 RM 250 13/49 original 1994-1996

108,00 €
Ready for dispatch shortly
AFAM
Chain Kit Afam 520 MR2 RM 125 12/50
Article no.: 48011431

Chain Kit Afam 520 MR2 RM 125 12/50

107,00 €
Ready for dispatch shortly
AFAM
Chain Kit Afam 520 MR2 SX 250 14/50
Article no.: 48011301

Chain Kit Afam 520 MR2 SX 250 14/50

104,00 €
Ready for dispatch shortly
AFAM
Chain Kit Afam 520 XRR3 EXC 250 13/48 self-cleaning rear sprocket
Article no.: 48011297

Chain Kit Afam 520 XRR3 EXC 250 13/48 self-cleaning rear sprocket

129,00 €
Ready for dispatch shortly
AFAM
Chain Kit Afam 520 MR2 SX 125 13/50 original 1994-1997
Article no.: 48011235

Chain Kit Afam 520 MR2 SX 125 13/50 original 1994-1997

105,00 €
Ready for dispatch shortly
AFAM
Chain Kit Afam 520 MR2 SX 125 13/50 original 1998
Article no.: 48011211

Chain Kit Afam 520 MR2 SX 125 13/50 original 1998

104,00 €
Ready for dispatch shortly
AFAM
Chain Kit Afam 520 MR2 KX 250 14/48 ultra-light rear sprocket
Article no.: 48011198

Chain Kit Afam 520 MR2 KX 250 14/48 ultra-light rear sprocket

105,00 €
Ready for dispatch shortly
AFAM
Chain Kit Afam 428 MX 85 KX 13/51 ultra-light rear sprocket
Article no.: 48011186

Chain Kit Afam 428 MX 85 KX 13/51 ultra-light rear sprocket

95,00 €
Ready for dispatch shortly
AFAM
Chain Kit Afam 520 MR2 KX 125 12/49 ultra-light rear sprocket
Article no.: 48011185

Chain Kit Afam 520 MR2 KX 125 12/49 ultra-light rear sprocket

107,00 €
Ready for dispatch shortly
AFAM
Chain Kit Afam 420 MX2 KX 85 14/51 Rear Sprocket self-cleaning
Article no.: 48011174

Chain Kit Afam 420 MX2 KX 85 14/51 Rear Sprocket self-cleaning

92,00 €
Ready for dispatch shortly
AFAM
Chain Kit Afam 520 MR2 KX 250 14/49 original 1992-1993
Article no.: 48011140

Chain Kit Afam 520 MR2 KX 250 14/49 original 1992-1993

106,00 €
Ready for dispatch shortly
AFAM
Chain Kit Afam 520 MR2 Husqvarna CR 250 14/50 ultra-light rear sprocket
Article no.: 48011091

Chain Kit Afam 520 MR2 Husqvarna CR 250 14/50 ultra-light rear sprocket

130,00 €
Ready for dispatch shortly
AFAM
Chain Kit Afam 520 MR2 Husqvarna CR 250 14/48 ultra-light rear sprocket
Article no.: 48011090

Chain Kit Afam 520 MR2 Husqvarna CR 250 14/48 ultra-light rear sprocket

130,00 €
Ready for dispatch shortly
AFAM
Chain Kit Afam 520 MR2 Husqvarna CR 250 15/50 ultra-light rear sprocket
Article no.: 48011086

Chain Kit Afam 520 MR2 Husqvarna CR 250 15/50 ultra-light rear sprocket

132,00 €
Ready for dispatch shortly
AFAM
Chain Kit Afam 520 MR2 Husqvarna CR 125 13/48 self-cleaning rear sprocket
Article no.: 48011033

Chain Kit Afam 520 MR2 Husqvarna CR 125 13/48 self-cleaning rear sprocket

131,00 €
Ready for dispatch shortly
AFAM
Chain Kit Afam 520 MR2 Husqvarna CR 125 12/50
Article no.: 48011032

Chain Kit Afam 520 MR2 Husqvarna CR 125 12/50

104,00 €
Ready for dispatch shortly
AFAM
Chain Kit Afam 520 MR2 CR 250 13/49 original 1994-1996
Article no.: 48010911

Chain Kit Afam 520 MR2 CR 250 13/49 original 1994-1996

107,00 €
Ready for dispatch shortly
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The gearbox - tuning via gear ratio

The gearbox or transmission is a mechanical device that transmits a motion from one part to another, with the possibility of changing speed and torque by gearing up or gearing down. In a scooter, there is the primary transmission (input shaft to torque drive + intermediate shaft) and secondary transmission (intermediate shaft + output shaft to wheel). The gear ratio has a great impact on acceleration and top speed. A short gear ratio gives good acceleration, but is a little weak on speed, which can be compensated by a longer gear ratio.

Since the gearbox is a very complex subject, here we have a gearbox tutorial for you that will help you choose your new gear ratio.

The complex world of gear ratios

Do you simply want to replace gearbox components because they are defective or worn? Or do you want to adjust the gear ratio after upgrading to a more powerful cylinder? In both cases, we recommend replacing both primary and secondary gears at the same time.

For very powerful engines, we recommend selecting the gears in a way that the final drive ratio can adequately convert the power delivered by the engine. Using a longer gear ratio may actually worsen acceleration, so you should always match the gearbox to the available RPM. Longer does not always mean better, it is best to get enough information before installing new gears!

In our online store we carry a wide range of individual gears and complete gearboxess for most scooters, mopeds and maxi scooters. Leading brands such as

offer top quality products at fair prices, with which you can improve the performance of your engine.

If you simply want to overhaul your gearbox, we also carry original spare parts for you, for manufacturers like

and many more.

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