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techtalk:ih:carb01r [2025/02/10 16:47]
– [Andrews High Flow Accelerator Pump (Keihin butterfly)] hippysmack |
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techtalk:ih:carb01r [2025/02/10 17:08] (current)
– [Andrews High Flow Accelerator Pump (Keihin butterfly)] hippysmack |
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| ===== Andrews High Flow Accelerator Pump (Keihin butterfly) ===== |
| Andrews Products (269050). It was also sold through V-twin as part number (35-9050). \\ |
| {{:techtalk:ih:carb:andrews_high_flow_accelerator_pump_instructions.png?linkonly|Click Here}} for the Installation instructions. \\ |
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| 79-up 34mm Keihin carbs will not fill there accelerator pumps as quickly as the 76-78 38mm ones. ((Joe Minton Article "Tuning HD's Keihin Carburetors")) \\ |
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| Actually, if you can find a 38mm pump and drill the hole in your carb body, you'll have the old style accel pump. |
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On 1980-1988 Keihin carbs, the stock accelerator pump is restricted by eliminating the check valves in the pump. A high flow accelerator pump puts them back. ((IronMick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/40980-carb-tuning-the-andrews-high-flow-accelerator-pump-kit?t=93242)) \\ |
| The result is increased fuel flow through the pump and greatly improved low end and mid range throttle response. \\ |
| Not intended for 1989 and later CV carburetors. \\ |
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| The Keihin butterfly carb already has an accelerator pump, so the Andrews high-flow pump body just replaces the stock one on the bottom of the float bowl. ((XLX of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/frame-mount-evo-sportster-talk-1986-2003-models/192675-andrews-accelerator-pump-for-keihin-carb-butterfly?t=2064358)) \\ |
There is one on the [[https://vtwin.parts/index.php?_route_=supplier/v-twin/sportster-1952-up/fuel-air-system/carburetor/rebuild-kits/harley-davidson-indian-motorcycle-keihin-carburetor-accelerator-pump-kit-35-9050&limit=50|V-twin website]] called the Flowmaster accelerator pump.\\ |
It has a V-twin part number of 35-9050, Manufacturer Keihin, Part Number: 269050.\\ |
//Flowmaster carb accelerator pump kit improves throttle response on Keihin carburetor models with a greater volume of fuel from the pump circuit//.\\ |
Makes since as Andrews used to make the Flowmaster carb.\\ |
The pump is listed as out of stock and has been since at least of march 2018 yet the listing is still up.\\ |
In fact and according to the V-twin website, it's been discontinued and no replacement is listed. |
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Installation instructions The Flowmaster carb accelerator pump kit improves throttle response on Keihin carburetor models with a greater volume of fuel from the pump circuit. Makes since as Andrews used to make the Flowmaster carb.\\ |
The pump is [[http://wwwlisted as out of stock and has been since at least of march 2018 yet the listing is still up.andrewsproducts.com/files/assets/carbpump1.pdf|here]]\\ |
| In fact and according to the V-twin website, it's been discontinued and no replacement is listed. \\ |
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| Features: ((http://www.johnnysreplacementparts.com/product/andrews-high-flow-accelerator-pump-kit-269050/)) |
