Adjust your idle mixture quickly and easily with the JD Jetting Fuel Screw.
This screw will need to be re-fitted with your original washer. spring and o-ring before installing. If you need replacements, they can be purchased here: https://jdjetting.com.au/product/keihin-fcr-spring-washer-o-ring-fuel-screw-parts/
Please note – some DRZ400 fuel bowl holes will have to be clearanced with a 6mm drill on installation.