Intake Manifold Set for Yamaha XS650 & TX650 (1973-1977) | OEM 447-13555-01

Product Overview

Restore the smooth idling and vintage soul of your Yamaha parallel-twin with the GOOFIT Heavy-Duty Intake Manifold Set. Specifically engineered for the 1973-1975 TX650 and the 1975-1977 XS650, this replacement interface (OEM 447-13555-01 and 447-13565-01) is the essential fix for one of the most common maintenance points on these classic bikes.

On vintage XS650 engines, the intake boots are subjected to constant vibration and intense cylinder head heat. Over decades, the original rubber hardens and develops micro-cracks, leading to air leaks that cause your engine to run lean and hot. Our upgraded manifolds feature a thickened pipe wall design for superior shock absorption and a perfect vacuum-tight seal, restoring the crisp throttle response your Yamaha was built for.

Product Compatibility

Direct replacement for the early "447" series Yamaha 650cc Parallel-Twin. Please verify your mounting pitch.

Brand	Model	Fitment Years	Replaces OEM Part #
Yamaha	TX650	1973 – 1975	447-13555-01 / 447-13565-01
Yamaha	XS650	1975 – 1977	447-13555-01 / 447-13565-01

Specifications

Precision measurements for a guaranteed vintage-fit.

Feature	Detail
OEM Reference	447-13555-01 & 447-13565-01
Mounting Hole Distance	70mm (2.75")
Inner Diameter	35mm (1.37")
Material	Reinforced Rubber with Thickened Wall Design
Properties	Shock-Absorbing, Corrosion-Resistant, High-Heat Stable

Key Features

• Thickened Wall Construction: Our manifolds are designed with a reinforced pipe wall to provide extra structural integrity. This added thickness offers superior shock absorption against the high vibration inherent in large-bore parallel twins, preventing the carburetors from "shaking" the air-fuel mixture.
• Superior Vacuum Performance: Engineered to provide a 100% airtight connection between the carburetors and the cylinder head. This eliminates unmetered air leaks, fixing common issues like "hanging idles" and backfiring on deceleration.
• High-Grade Material Science: Constructed from premium synthetic rubber that resists the corrosive effects of modern ethanol-blended fuels and the high temperatures of an air-cooled engine block.
• Restores Engine Smoothness: By providing a stable, turbulence-free intake path, these manifolds improve combustion efficiency, directly enhancing fuel economy and engine power.
• Direct Factory-Spec Fit: Strictly manufactured to match the 70mm mounting pitch and 35mm internal diameter for a hassle-free, bolt-on installation.