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Stage6 14/41 Secondary gear kit for Yamaha Aerox

$199.00

Stage6 14/41 (2.93) Secondary gear kit for Yamaha Aerox.

Taller gears reduce the overall gear ratio of your transmission and will result in improved performance. If the engine is powerful enough to pull the taller gears, top speed will not be negatively affected (or can even be increased). OEM engines usually don’t have enough power to pull this kind of transmission, so you will need a tuning cylinder.

Always keep in mind: The smaller the ratio / numerical number, the taller the gears!

In Stock at Euro Warehouse (Ships in 8-12 days)

Description

Stage6 14/41 Secondary gear kit for Yamaha Aerox

Stage6 Secondary Transmission 14/41 (2.93) Minarelli, pre-pressed tuning transmission for changing gear ratio and performance.

Taller gears reduce the overall gear ratio of your transmission and will result in improved performance. If the engine is powerful enough to pull the taller gears, top speed will not be negatively affected (or can even be increased). OEM engines usually don’t have enough power to pull this kind of transmission, so you will need a tuning cylinder.

Unlike most other transmissions, Stage6 transmissions are pre-pressed – and available at a knock-out price!. All you have to do is get take out your old transmission gears and replace them with the new gears, close the cover – done!

To calculate the percent increase of your transmission ratio you need the ratios of both the original and the new tuning gears. Now divide the ratio of the original gearing by the ratio of the tuning gearing, subtract 1 and multiply the result by –100.

Example: ((2.56 : 3.07) –1) x (–100) = 16.62%

Always keep in mind: The smaller the ratio / numerical number, the taller the gears!!! 

14/41 (2.93)

Gear kits are typically used when trying to gain more top speed. As gearing ratio’s are usually well set from the factory, in almost all cases the installation of a gear ‘up’ kit (lowering the ratio for more top speed) should not be used in an otherwise standard scooter. The beneficial use of gearing up a scooter is on a motor which has been modified to produce more power (performance exhaust, cylinder, carb, etc). In almost all cases, a lower gearing ratio is what a scooter tuner would aim for, to achieve more top speed and give the motor more gearing to appropriately match the higher power output.

Within a scooter diff gear there are 2 sets of gears, the primary and secondary drives. Both are made up of 2 gears each. The Primary drive is made up of the Primary Drive Shaft (shaft that the clutch and rear torque pulley sit on inside the CVT transmission) and the outer gear of the idle gear. The secondary drive is made up of the pressed shaft gear inside the outer gear of the idle gear and the final drive gear which is pressed onto the drive shaft (which the rear wheel bolts to).

Diff Gear Diff gear

The gearing ratio of the diff gear can be lowered via the primary or secondary gears with the installation of a Malossi Primary or Secondary gear kit. The best way to decide what gear kit is right for you is to measure count how many gears your current diff gear has.

 

Working out the amount of difference is done by calculating how many rotations of the primary drive shaft (CVT side of the diff) equate to one rotation of the drive shaft (and therefore the rear wheel). An average 50cc scooter will have somewhere between 11 – 13 rotations of the primary shaft to the drive shaft as a very generalised rule.

for instance, if the standard gears are:

Primary – 13 / 46                 Secondary 15 / 48

To work out the gearing ratio: Primary large gear ÷ small gear, secondary large gear ÷ small gear. Then multiply both results for the overall ratio of number of Primary shaft rotations to every single wheel rotation. In this instance with the gear ratios listed above the result is 11.2/1. When working out the difference with the installation of a gear up kit, simply substitute the gearing ratio of the gear kit to plan to install (whether primary or secondary) and see what the difference is compared to the standard.

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