HIAORS Rear Brake Master Cylinder Reservoir — Compatible with Coleman CK100, Yerf Dog GX150, and More

Reliable compatibility for popular Chinese ATV and go-kart models

The HIAORS rear brake master cylinder reservoir is designed as a versatile replacement part for a wide range of 50cc–150cc Chinese ATVs, go-karts, and pit bikes. It aims to deliver a dependable baseline for braking system reliability, using sturdy materials and a design focused on seal integrity. This reservoir is a practical option for riders who want to keep their braking system working smoothly without unnecessary downtime.

Key compatibility includes Yerf Dog GX150 150cc, Coleman CK100 series (CK100-s/ KT196/ RTK200), Helix 150cc go-karts, TaoTao ATA150, and various Redcat, AX-1 XR250 ATVs, and similar platforms. If you’re upgrading or replacing a worn reservoir, this unit is intended to fit many popular Chinese-made quads and go-karts.

Quality construction and sealing you can rely on

Made from aluminum alloy, the reservoir emphasizes durability, waterproof sealing, and corrosion resistance. The design aims to avoid damage to the internal bore and protect the piston function, contributing to a service life that can outlast lower-quality parts in tough riding conditions.

• Aluminum alloy body for strength and corrosion resistance
• Good sealing and waterproof properties to help protect braking components
• Durable construction designed to support long-term use

Easy installation and precise fit

Manufactured with practical engineering, this reservoir is positioned to offer straightforward installation and reliable airtight connections. The high airtightness reduces risk of leaks at the pipe connection, so you can focus on riding rather than maintenance hassles.

• Mounting holes spaced at 1.77 inches (45 mm)
• Banjo bolt diameter 0.39 inches (10 mm)
• Total length 8.07 inches (205 mm); oil tube length 13.98 inches (355 mm)

Size check and after-sales notes

Before purchasing, please compare the listed dimensions with your existing setup to ensure a proper fit. If you have questions after purchase, reach out for support. This part is intended as a replacement option and may suit a range of 50cc–150cc models beyond the explicit names listed.

Practical use scenarios

Whether you’re restoring a classic Coleman CK100, upgrading a Yerf Dog GX150 project, or keeping a compact ATV on track, this reservoir offers a practical, no-fruss replacement path. It’s designed to support regular riding, track days, and weekend trails where reliable braking matters. While not a guarantee of performance, the material quality and construction aim to help maintain consistent braking feel and respond well to routine maintenance.