Intake Manifold Boot for Honda CBR250 MC19 MC22 & CB400SF NC31 | OEM 16211-KY1-000

Product Overview

Maintain the screaming performance of your inline-four Honda with this premium Carburetor Intake Manifold Boot. Specifically engineered for the legendary CBR250 (MC19/MC22) and the iconic CB400 Super Four (NC31), this component replaces OEM #16211-KY1-000 and #16211-KAZ-000. High-revving engines depend on precise vacuum integrity; even a microscopic crack in your intake boots can cause erratic idling, poor throttle response, and engine overheating. This boot is crafted from professional-grade rubber to provide a factory-perfect seal for your high-performance carburetor bank.

Product Compatibility

Direct replacement for Honda 4-cylinder high-rev engines. Please verify your engine code before ordering.

Brand	Model	Fitment Years	Engine / OEM Code
Honda	CBR250R / RR	1988 – 1989	MC19 / 16211-KY1-000
Honda	CBR250RR	1990 – 1994	MC22 / 16211-KAZ-000
Honda	CB400 Super Four	1992 – 1998	NC31 / 16211-KAZ-000
Honda	CB400SF	1992 – 1998	NC31 / 16211-KAZ-000

Specifications

Feature	Detail
OEM References	16211-KY1-000 / 16211-KAZ-000
Material	Premium Oil-Resistant Synthetic Rubber
Compatibility	4-Cylinder Carbureted Engines
Durability	Heat-Resistant & Anti-Cracking
Fitment Type	Direct Bolt-on Replacement

Key Features

• Premium Oil-Resistant Material: Constructed from high-quality synthetic rubber that is specifically formulated to resist degradation from modern fuels and engine oils.
• Maximum Durability: Engineered to withstand the extreme thermal stress of high-revving 250cc and 400cc inline-four engines, ensuring long-lasting usage without hardening or cracking.
• Stable Vacuum Integrity: Restores the airtight seal required for precise carburetor synchronization. Eliminates "air leaks" that cause hanging idles, backfiring, and inconsistent power delivery.
• Exact OEM Dimensions: Precision-molded to match factory specifications for the MC19, MC22, and NC31 models, ensuring a secure and easy installation on your carburetor rack.
• Engine Protection: By preventing unfiltered air from entering the combustion chamber, these boots help maintain the correct air-fuel ratio, protecting your pistons and valves from lean-run damage.