Description
The ARC AC-MC104 is a billet master cylinder reservoir cap for select Honda, Kawasaki, Suzuki and Yamaha motorcycles equipped with compatible Nissin clutch or rear brake master cylinders. Depending on the application, it replaces the factory clutch or rear brake reservoir cap with a precision-machined ARC upgrade.
Machined from 6061 billet aluminum and available in multiple anodized colors, the AC-MC104 delivers a clean, factory-inspired look with a precise OEM-style fit.
IMPORTANT: The AC-MC104 is used in different positions depending on the application. Verify whether your motorcycle uses this cap on the clutch, rear brake or both before ordering.
KEY FEATURES
- CNC-MACHINED 6061 BILLET ALUMINUM
- DIRECT OEM-STYLE REPLACEMENT
- DESIGNED FOR SELECT NISSIN CLUTCH AND REAR BRAKE MASTER CYLINDERS
- PRECISION-MACHINED FOR A FACTORY FIT
- DURABLE ANODIZED FINISH
- ARC LOGO
- MADE IN THE USA
VERIFY FITMENT: Match your exact make, model, year and master cylinder position below before ordering.
FITMENT
HONDA
- CRF250 RWE: 2025-2026 — Clutch
- CRF450R / RWE: 2021-2026 — Clutch
- CRF450R-S: 2022-2024 — Clutch
- CRF450RX: 2021-2026 — Clutch
KAWASAKI
- KX 125: 2000-2005 — Rear Brake
- KLX 230 / R / RS / S / SE: 2020-2026 — Rear Brake
- KX 250: 2000-2007 — Rear Brake
- KX 250F: 2004-2018 — Rear Brake
- KX 250: 2019-2020 — Rear Brake
- KX 250 / X / XC: 2021-2026 — Clutch & Rear Brake
- KLX 300R: 2020-2026 — Rear Brake
- KLX 450R: 2008-2009 — Rear Brake
- KX 450F: 2004-2018 — Rear Brake
- KX 450 / X / XC / SR: 2019-2023 — Clutch & Rear Brake
- KX 450 / X / SR: 2024-2026 — Clutch
SUZUKI
- RM 125: 2006-2008 — Rear Brake
- RM 250: 2006-2008 — Rear Brake
- RM-Z 250: 2008-2025 — Rear Brake
- RM-Z 450: 2008-2025 — Rear Brake
- RMX-Z 450Z: 2017-2019 — Rear Brake
YAMAHA
- YZ 250F: 2027 — Clutch
- YZ 450F: 2026-2027 — Clutch
ARC AC-MC104 Billet Nissin Clutch / Rear Brake Master Cylinder Cap
Description
The ARC AC-MC104 is a billet master cylinder reservoir cap for select Honda, Kawasaki, Suzuki and Yamaha motorcycles equipped with compatible Nissin clutch or rear brake master cylinders. Depending on the application, it replaces the factory clutch or rear brake reservoir cap with a precision-machined ARC upgrade.
Machined from 6061 billet aluminum and available in multiple anodized colors, the AC-MC104 delivers a clean, factory-inspired look with a precise OEM-style fit.
IMPORTANT: The AC-MC104 is used in different positions depending on the application. Verify whether your motorcycle uses this cap on the clutch, rear brake or both before ordering.
KEY FEATURES
- CNC-MACHINED 6061 BILLET ALUMINUM
- DIRECT OEM-STYLE REPLACEMENT
- DESIGNED FOR SELECT NISSIN CLUTCH AND REAR BRAKE MASTER CYLINDERS
- PRECISION-MACHINED FOR A FACTORY FIT
- DURABLE ANODIZED FINISH
- ARC LOGO
- MADE IN THE USA
VERIFY FITMENT: Match your exact make, model, year and master cylinder position below before ordering.
FITMENT
HONDA
- CRF250 RWE: 2025-2026 — Clutch
- CRF450R / RWE: 2021-2026 — Clutch
- CRF450R-S: 2022-2024 — Clutch
- CRF450RX: 2021-2026 — Clutch
KAWASAKI
- KX 125: 2000-2005 — Rear Brake
- KLX 230 / R / RS / S / SE: 2020-2026 — Rear Brake
- KX 250: 2000-2007 — Rear Brake
- KX 250F: 2004-2018 — Rear Brake
- KX 250: 2019-2020 — Rear Brake
- KX 250 / X / XC: 2021-2026 — Clutch & Rear Brake
- KLX 300R: 2020-2026 — Rear Brake
- KLX 450R: 2008-2009 — Rear Brake
- KX 450F: 2004-2018 — Rear Brake
- KX 450 / X / XC / SR: 2019-2023 — Clutch & Rear Brake
- KX 450 / X / SR: 2024-2026 — Clutch
SUZUKI
- RM 125: 2006-2008 — Rear Brake
- RM 250: 2006-2008 — Rear Brake
- RM-Z 250: 2008-2025 — Rear Brake
- RM-Z 450: 2008-2025 — Rear Brake
- RMX-Z 450Z: 2017-2019 — Rear Brake
YAMAHA
- YZ 250F: 2027 — Clutch
- YZ 450F: 2026-2027 — Clutch
