TM Designworks Australia Slider Extreme KAW 85 :

TM Designworks Chain Slider Extreme KAW KX 85 & KX 100 Green

DIRT CROSS Front Chain Slider. 
Compression injected molded chain slider.

Suitable for all types of riding.
Developed with additional material and design shape to increase performance and durability. 
Chain guidance control wings keep the chain in better alignment and minimizes tire buzz.
Friction reducing additives and UV protection to eliminate color fade.
Includes new bushings and mounting hardware. 
Used by championship winning race teams worldwide.
Recommended by MXA, Dirt Bike and Dirt Rider magazines.
Made in the USA.
Patent Pending. 
 

Fitment From Parts Finder:

KAWASAKI (99-27)  KX 85, 100 & KX 112