GOOFIT
Intake Manifold Set for Yamaha XS650 & TX650 (1973-1977) | OEM 447-13555-01
Intake Manifold Set for Yamaha XS650 & TX650 (1973-1977) | OEM 447-13555-01
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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.
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Fitment FAQ
Will this part fit my specific model and year?
This intake manifold is intended for Direct replacement for the early "447" series Yamaha 650cc Parallel-Twin. Please verify your mounting pitch.; Fitment Years; Replaces OEM Part #; Yamaha; TX650; 1973 – 1975; 447-13555-01 / 447-13565-01. Listed year information includes 1973–1977, 1973–1975, 1975–1977, 1973, 1977. It is best matched to original part number(s) 447-13555-01, 447-13565-01, 1973-1977, 1973-1975. Key physical/spec details from the product data include Mounting Hole Distance: 70mm (2.75"), Inner Diameter: 35mm (1.37"), 650cc. Use the compatibility table and product photos together before ordering.
Do I need to match the OEM part number?
Yes. Match your original part number to 447-13555-01, 447-13565-01, 1973-1977, 1973-1975 before purchase. For this intake manifold, also compare the bolt spacing, intake port shape, carb-side inner diameter, vacuum nipple position, and gasket shape. This is especially important for Yamaha XS650/TX650 models because similar model names can use different parts by year or trim.
What models or situations does this part not fit?
Do not order this intake manifold for machines outside the listed compatibility, or for units with different port shapes, bolt spacing, carb-side diameter, or vacuum nipple locations. If your original part number does not cross-reference with 447-13555-01, 447-13565-01, 1973-1977, 1973-1975, treat the fitment as unconfirmed. Model years outside 1973–1977, 1973–1975, 1975–1977, 1973, 1977 should be verified separately. Do not rely only on the model name or engine size.
What should I check before ordering?
Before ordering, compare your original part with the photos and check the bolt spacing, intake port shape, carb-side inner diameter, vacuum nipple position, and gasket shape. Confirm OEM/cross-reference number(s): 447-13555-01, 447-13565-01, 1973-1977, 1973-1975. Recheck listed specs such as Mounting Hole Distance: 70mm (2.75"), Inner Diameter: 35mm (1.37"), 650cc. If any connector, mounting point, size, or year detail is different, confirm fitment before installation.