I converted my W650 from 525 to 520 chaind and sprockets. The bike lost almost 1 kg after that.This sprocket weights 226 gr. The stock one is 670 gr.Also i increased the ratio for offroad racing purposes.
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51.46 USD (7,635 JPY) 60.66 USD Save 15%
Delivery Information
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FITMENT
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KX100
16-21
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KX80 II
88-00
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KX80
88-00
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KX85 II
01-21
See all
KAWASAKI
Product detail
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Sprocket use Rear
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Applicable chain size 420
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Sprocket material duralumin
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Number of rear sprocket teeth 51
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Sprocket color black
■For rear
■Compatible chain sizes: 420
[Material] Ultra duralumin (A7075) material (hard anodized finish)
[Color] Black
[Weight] Approx. 1/3 of steel (stock) etc.
[Specifications] Durability: 10000 to 20000km (*)
**The stock size chain cannot be used on vehicles that are set up for conversion, and must be converted to the correct chain size.
*The color and shape of the delivered product may differ from the picture.
*If you change the number of sprockets from the stock, it may not be able to be installed on some models.
*Durability is for reference only.It depends on your riding style, chain size and maintenance condition.
*Offset figures are for sprockets only.
*The actual offset of the chainline from the stock value will vary from model to model.Please note that if the stock sprocket has an offset, that value will be subtracted.(It depends on each model)
*Not all of the available tooth numbers can be installed without interference to the vehicle body.Please confirm the installation of each vehicle body according to the number of teeth by yourself.
*There may be changes in product specifications due to the manufacturer's reasons..
* The image is only for reference. The image shown may differ from the actual product.
Ultra duralumin (A7075) is used as the material, and after hardening and heat treatment T6, it is machined one by one.In addition, the surface is treated with a special hard film (hard alumite), and boasts superior hardness and durability compared to ordinary alumite products.In addition, it contributes greatly to the weight reduction under the spring by the bold cutting process while securing sufficient strength.Moreover, the natural coloration of the hard material during processing does not fade.
Stock Spec List | |||||
Front | Rear | Reduction Ratio | Chain | Manufacturer | Model |
13T | 51T | 3.92 | 420-124 | KAWASAKI | KX85 II 01-09 |
14T | 50T | 3.57 | 420-120 | KAWASAKI | KX85 01-09 |
13T | 51T | 3.92 | 420-124 | KAWASAKI | KX80 II 98-00 |
13T | 54T | 4.15 | 420-128 | KAWASAKI | KX80 II 90-97 |
14T | 50T | 3.57 | 420-120 | KAWASAKI | KX80 98-00 |
13T | 49T | 3.77 | 420-118 | KAWASAKI | KX80 90-97 |

Sprocket Course - Basics - Frequent maintenance is the secret to riding your bike for a long time!SUNSTAR
Points of Attention
* If there may be an instruction manual included, it will be written in Japanese.