ARC AC-MC107 Billet Formula Clutch / Left-Hand Brake Master Cylinder Cap
The ARC AC-MC107 is a billet master cylinder reservoir cap for select Gas Gas, Husqvarna and KTM motorcycles equipped with compatible Formula master cylinders. Depending on the application, it replaces the clutch or left-hand brake reservoir cap with a precision-machined ARC upgrade.
Machined from 6061 billet aluminum and available in multiple anodized colors, the AC-MC107 delivers a clean, factory-inspired look with a precise OEM-style fit.
IMPORTANT: On electric motorcycle applications, the AC-MC107 is used on the left-hand brake master cylinder. On compatible gas-powered applications, it is used on the clutch master cylinder.
✔️Chosen by factory riders
⚙️Precision crafted in California, USA
Fitment
Part# AC-MC107
HUSQVARNA
EE 3: 2024-2025 — Left-Hand Brake
TC 65: 2017-2025 — Clutch
TC 85: 2014-2025 — Clutch
GAS GAS
MC 65: 2021-2026 — Clutch
MC 85: 2021-2026 — Clutch
MC-E 3: 2023-2025 — Left-Hand Brake
KTM
Freeride E-XC: 2015-2025 — Left-Hand Brake
SX-E 3: 2022-2025 — Left-Hand Brake
65 SX: 2014-2026 — Clutch
85 SX: 2013-2026 — Clutch
250 F FREE RIDE (Non US): 2018-2020 — Clutch
250 R FREE RIDE: 2014-2017 — Clutch
350 FREERIDE (Non US): 2012-2017 — ClutchDescription
- CNC-MACHINED 6061 BILLET ALUMINUM
- DIRECT OEM-STYLE REPLACEMENT
- DESIGNED FOR SELECT FORMULA CLUTCH AND LEFT-HAND BRAKE MASTER CYLINDERS
- PRECISION-MACHINED FOR A FACTORY FIT
- DURABLE ANODIZED FINISH
- ARC LOGO
- MADE IN THE USA





























