No, you should not put DOT 4 brake fluid in a motorcycle brake system that requires DOT 5 fluid. DOT 4 and DOT 5 are two different types of brake fluids with different chemical compositions and properties. Mixing them can lead to adverse effects and potentially compromise the performance and safety of your motorcycle's braking system.
Here's the key difference between DOT 4 and DOT 5 brake fluids:
Composition: DOT 4 brake fluid is typically glycol-based, while DOT 5 brake fluid is silicone-based. The different compositions result in variations in viscosity, boiling points, and compatibility with different materials.
Compatibility: DOT 5 brake fluid is primarily designed for use in systems that require a silicone-based fluid. It is not compatible with systems designed for glycol-based fluids like DOT 4. Using DOT 4 fluid in a DOT 5 system or vice versa can lead to seal swelling, brake system damage, and reduced brake performance.
To ensure the proper functioning of your motorcycle's braking system, it's crucial to use the correct brake fluid as specified by the manufacturer. Check your motorcycle's owner's manual or consult with a qualified mechanic to determine the appropriate brake fluid type (DOT 4, DOT 5, or any other specific variant) recommended for your motorcycle. Following the manufacturer's guidelines will help maintain the integrity and safety of your motorcycle's braking system.