FACTORY EDITION #2 Rear Guide. 
Durable design with a replaceable wear pad. 

Developed for Enduro, Baja, Motocross, and off-road. Suitable for all types of riding.
Works with all standard and sealed chains.
Includes new mounting hardware. 
Industry leading plastic formula “RMS” (Return Memory System).  
Absorbs impacts and returns to center.
Friction reducing additives and UV protection to eliminate color fade.
Used by championship winning race teams worldwide.
Recommended by MXA, Dirt Bike and Dirt Rider magazines.
Made in the USA.
US Patent: D600,600
EU Patents: 001155048-0001; 001155048-0002
Replacement wear pads available for individual sale.

Notes: 
This rear guide comes with an alloy drop bracket .
The guide also works on the 300 dual sport model without the bracket.
That  bike has a much smaller  rear sprocket.
Depending on the bike and sprocket size you may need a longer or shorter chain for correct wheel position.

Fitment From Parts finder:
KAWASAKI (21-23) KLX 300 (48-51 Tooth) 
Offroad Model