This hydraulic brake light switch replaces the banjo bolt on the rear master cylinder. It allows you to add a brake light circuit for the rear brake. You will also need the DRC CRFX light. This is NOT a plug-n-play product as the CRF X models do not have a rear brake harness. You will have to build this brake light circuit using this product, the DRC CRFX light, and your own wiring harness. If you are not familiar with this type of work seek out a professional.
OPTIONAL: Banjo Bolt Crush Washers are recommend. Set of 10 M10 banjo bolt crush washers.
NOTE: If you are not familiar with this type of installation please seek out a professional. CRF's Only can not provide installation support on this product.