Description
This high‑quality SPI intake boot flange is designed for Mikuni VM40 and VM44 style carburetors. It replaces the original Mikuni VM40‑200 flange and restores proper sealing between the carburetor and intake tract—critical for preventing vacuum leaks, lean running, bogging, and poor throttle response on older Arctic Cat and Yamaha snowmobiles.
Built from reinforced, cold‑resistant rubber, this flange is engineered for long‑term durability and reliable performance in harsh winter riding conditions.
⭐ Key Features
• Direct replacement for worn, cracked, or hardened intake flanges
• Maintains proper air/fuel delivery and prevents vacuum leaks
• Reinforced rubber construction for long service life
• Manufactured in Taiwan to meet or exceed OEM specifications
• Fits Mikuni VM40–VM44 carburetors
• Sold individually
🔄 Replaces OEM Numbers
• Mikuni: VM40‑200
• Arctic Cat: 0670‑198
• Yamaha: 8H8‑13555‑01‑00
🔧 Fitment
Arctic Cat — Liquid‑Cooled 580–700cc Models
• Wildcat 650 L/C — 1989–1990
• Wildcat 650 L/C Mountain Cat — 1989–1990
• Wildcat 700 L/C / EFI / Mountain Cat — 1991–1994
• EXT 580 L/C EFI / Mountain Cat — 1993–1994
• Pantera 550 L/C — 1993–1994
• Prowler 440 L/C / 2‑Up — 1994
• ZR 580 L/C — 1994–1996
• ZR 700 L/C — 1994–1995
Yamaha
• EX440 — 1980–1981
• SS440 — 1981–1983
• SR540 / SRV — 1984–1988
💡 Why Riders Choose This Part
A cracked or hardened intake flange is one of the most common causes of lean running, bogging, and hard starting on older sleds. Installing a fresh SPI flange restores proper sealing, improves throttle response, and brings back consistent cold‑weather performance.
📏 Technical Specifications
• Bolt pattern: 74.6 mm
• Bolt hole diameter: 8.5 mm
• Bolt size: 46 mm
• Throat depth: 32 mm
• Spigot diameter: 52 mm
• Stud pattern: HD
• Stud opening: 3″
• Carb opening: 2″
• Fits Mikuni VM40–VM44 carburetors
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