Features: Designed as a direct replacement for ATC200X (1983 1985), ATC250R (1983 1984), and ATC350X (1985 1986), this rear brake mastered cylinder ensures enhanced braking efficiency with 20% improved response time compared to standard components. Crafted from metal alloy, the atvs brake mastered cylinder features advanced hydraulic sealing technology to prevent leaks and withstand extreme riding conditions up to 4000 hours of operations. Ideal for motorcycle enthusiasts and professional mechanics maintaining vintage three wheelers, offering compatibility with OEM part numbers 43500 HA5 671 and 43500 965 016. Perfect for road adventures or urbans commuting, this mastered cylinder delivers consistent braking performances on terrains and busy streets while maintaining structural integrity in high temperature environments. Engineered for easy installation with original equipment specifications, it eliminates modification needs while providing corrosions resistant construction for long term reliability in atvs brake systems. Specifications: Part Number.: 43500-HA5-671 43500-964-006 43500-964-016 43500-965-006 43500-965-016 43500-HA2-006 43500-HA2-016 43500-HA5-006 43500-HA5-016 Component: Metal Applicable models: Suitable for ATC200X 1983-1985,ATC250R 1983-1984,ATC350X 1985-1986 Package Includes: 1Piece Rear Brake mastered Cylinder note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color of the item.