Kit final trasmission CHT Chiaravalli for Aprilia SX 125 08-12 (Chain RK 520 XRE 112 links - Front 15 - Rear 45 - Chain 520) GOLD color chain

Kit consisting of RK chain and CHT Chiaravalli rear and front sprocket with ratios equal to the OEM, the type of chain supplied in the kit and the teeth of the front and rear sprockets are indicated in the product title.

Both the chain and the gears are of superior quality compared to the original ones and guarantee greater durability and performance.

Chiaravalli has been synonymous with gears for over 70 years, always a reference in the motorcycle market.
Technology, materials, cutting-edge treatments allow to create the best products capable of winning in world competitions, from the track to Off-Road.
The production quality respects the strict OEM standards and they are suppliers of the main European motorcycle manufacturers.
All products are certified ISO9001, and all the sprockets are heat treated for more resistance and longer durability. 

RK, with over 60 years of experience in Motorcycle chains production is one of the leader in motorcycle chain’s market.
The constant quality year after year of the products, the innovation and high performance products has enabled RK to work with world-renowned partners such as Honda, Suzuki, Yamaha, Kawasaki, and Triumph for Original Equipment.
But RK is also active in the races field with champions in Moto GP, Endurance and Motocross.

For the best working and longer duration of the transmission, it needs to be cleaned and lubricated every 1000 Km at least, using our specific cleaner and lubrificant for chains that you find CLICKING HERE

By choosing the ratios, 1 front sprocket cog is equal to about 3 rear sprocket cogs (the exact ratio is given by: number of rear sprocket teeth / number of front sprocket teeth).

Remember that if you want more acceleration you have to mount a rear sprocket with more toothing, or a front sprocket with lower toothing. Ratios have to be necessarily and exclusively chosen by yourself. It is usual to mount a rear sprocket with 2 teeth more than the stock one, but that is however a medium choice which does not mean to be satisfying to everybody.

In a circuit, generally the right final ratio will be that allowing to achieve, at the highest gear, about 200 rpm more than the max power rate, always staying 200 / 300 rpm under the maximum rate the engine can reach. This way, you can take advantage of the trail of the driver who is preceding you.

Choosing the final ratio, remember that the bigger it is, the more the acceleration will be. But if it is too big, you will lose speed. If on the contrary the ratio is too small, you will lose acceleration and will not manage to reach the maximum speed.