GOOFIT
Intake Manifold Spacer & Boot Set with Gaskets for Yamaha XS650 (1978-1983) | OEM 3G1-13586-00
Intake Manifold Spacer & Boot Set with Gaskets for Yamaha XS650 (1978-1983) | OEM 3G1-13586-00
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Product Overview
Restore the smooth idling and legendary torque of your Yamaha Heritage Twin with the GOOFIT Carburetor Intake Joint Set. Specifically designed for the 1978-1983 XS650, this complete set replaces OEM #3G1-13586-00 and #3G1-13596-00.
On vintage XS650 engines, the original intake boots are prone to dry-rot and cracking, leading to lean-running conditions that cause backfiring and engine overheating. Our high-quality rubber joints include a precision-matched gasket set to ensure an absolute vacuum seal between your Mikuni carburetors and the cylinder head.
Product Compatibility
Direct replacement for Yamaha 650cc Parallel-Twin engines. Please measure your mounting points before ordering.
| Brand | Model | Fitment Years | Replaces OEM Part # |
| Yamaha | XS650 | 1978 – 1983 | 3G1-13586-00 (Left) |
| Yamaha | XS650 Special | 1978 – 1983 | 3G1-13596-00 (Right) |
| Yamaha | XS650 Heritage | 1982 – 1983 | 3G1-13586 / 3G1-13596 |
Specifications
Ensuring a perfect bolt-on fit for your vintage restoration.
| Feature | Measurement / Detail |
| Inner Diameter | 30mm (1.18") |
| Mounting Hole Spacing | 60mm (2.36") |
| OEM Reference | 3G1-13586-00-00 / 3G1-13596-00-00 |
| Material | Aging-Resistant Synthetic Rubber & Anti-Corrosion Alloy |
| Package Includes | Intake Boots (L+R) & Sealing Gaskets |
Key Features
- Premium Aging-Resistant Rubber: Constructed from a high-quality rubber compound that is specifically engineered to resist corrosion, rust, and wear. It maintains flexibility and seal integrity even after years of exposure to engine heat and modern fuels.
- Complete Gasket Set Included: Unlike basic boots, this kit comes with the necessary gaskets to ensure a 100% airtight connection. This eliminates "phantom" air leaks that make carburetor tuning nearly impossible on vintage twins.
- Maximum Durability & Stability: Designed to withstand the heavy vibrations of the XS650 engine. The reinforced structure ensures the boots won't deform or slip under high-vacuum pressure.
- Precision Manufacturing: Features exact 60mm hole spacing and a 30mm inner bore, ensuring a seamless fit with factory-spec carburetors and cylinder head ports.
- Engine Performance Restoration: By stabilizing the air-intake volume, these joints help fix common XS650 issues like hanging idles, hard starting, and sluggish throttle response.
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Fitment FAQ
Will this part fit my specific model and year?
This intake manifold is intended for Direct replacement for Yamaha 650cc Parallel-Twin engines. Please measure your mounting points before ordering.; Fitment Years; Replaces OEM Part #; Yamaha; XS650; 1978 – 1983; 3G1-13586-00 (Left). Listed year information includes 1978–1983, 1982–1983, 1978, 1983, 1982. It is best matched to original part number(s) 3G1-13586-00, 3G1-13596-00, 1978-1983, 3G1-13586. Key physical/spec details from the product data include Inner Diameter: 30mm (1.18"), Mounting Hole Spacing: 60mm (2.36"), 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 3G1-13586-00, 3G1-13596-00, 1978-1983, 3G1-13586 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 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 3G1-13586-00, 3G1-13596-00, 1978-1983, 3G1-13586, treat the fitment as unconfirmed. Model years outside 1978–1983, 1982–1983, 1978, 1983, 1982 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): 3G1-13586-00, 3G1-13596-00, 1978-1983, 3G1-13586. Recheck listed specs such as Inner Diameter: 30mm (1.18"), Mounting Hole Spacing: 60mm (2.36"), 650cc. If any connector, mounting point, size, or year detail is different, confirm fitment before installation.