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| techtalk:ref:carb09 [2019/09/01 16:52] – created hippysmack | techtalk:ref:carb09 [2024/01/12 00:07] (current) – hippysmack |
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| ====== Ironhead - Installing a Keihin CV Carb ====== | ====== Ironhead - Installing a Keihin CV Carb ====== |
| | See also in the Evo section of the Sportsterpedia: \\ |
| | * [[:techtalk:evo:carb01|Basic Carb Model Info]] |
| | * [[:techtalk:evo:carb02|Keihin CV40 Carb Functions, Adjustments, Tuning]] |
| | * [[:techtalk:evo:carb01a|Rebuilding the Keihin CV40 Carb]] |
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| | The filter sticks out about 1" farther than before, but it doesn't look bad. \\ |
| | The bike now runs pretty decently with a stable idle. There is a lot more mid-range punch. It's weak on the top end, though. \\ |
| | Here's a view from the rider's seat. |
| | {{: techtalk:ref:carb:ih_cv_carb_swap_17_by_blight.jpg?direct&300|}} ((photo by BLIGHT of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/84301-40mm-cv-carb-swap-today?t=636098)) |
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| | Remove the old air cleaner and carb. \\ |
| | {{:techtalk:ref:carb:ih_cv_carb_swap_9_by_blight.jpg?direct&300|}} ((photo by BLIGHT of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/84301-40mm-cv-carb-swap-today?t=636098)) {{:techtalk:ref:carb:ih_cv_carb_swap_10_by_blight.jpg?direct&300|}} ((photo by BLIGHT of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/84301-40mm-cv-carb-swap-today?t=636098)) \\ |
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| | ====== Intake Manifold to Carb Mount ====== |
| | Three most common ways to mount a CV to an Ironhead intake: \\ |
| | A Mikuni metric adapter, a press on adapter or a non press adapter - (requires stock CV seal). ((photos by GA_Ironhead of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/81692-quick-relpy-need-carb-fitment?postcount=5#post1683898)) \\ |
| | A press-on adapter is sold that press-fits on the carb spigot with JB Weld. \\ |
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| | {{:techtalk:ref:carb:metric_mikuni_adapter_by_ga_ironhead.jpg?direct&300|}} {{:techtalk:ref:carb:press-on_carb_adapter.jpg?direct&300|}} {{:techtalk:ref:carb:non_press_carb_adapter.jpg?direct&300|}} |
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| | {{:techtalk:ref:carb:ih_cv_carb_swap_3_by_blight.jpg?direct&300|}} ((photo by BLIGHT of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/84301-40mm-cv-carb-swap-today?t=636098)) {{:techtalk:ref:carb:ih_cv_carb_swap_4_by_blight.jpg?direct&300|}} ((photo by BLIGHT of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/84301-40mm-cv-carb-swap-today?t=636098)) \\ |
| | |
| | ====== Carb to Air Cleaner Mount ====== |
| | The original XLCR intake manifold was used but with a rubberized flanged adapter to the carb. \\ |
| | A Screaming Eagle / K&N air filter assembly was used for this carb swap. Here are some pics of mounting it to the carb. \\ |
| | {{:techtalk:ref:carb:ih_cv_carb_swap_1_by_blight.jpg?direct&300|}} ((photo by BLIGHT of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/84301-40mm-cv-carb-swap-today?t=636098)) {{:techtalk:ref:carb:ih_cv_carb_swap_2_by_blight.jpg?direct&300|}} ((photo by BLIGHT of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/84301-40mm-cv-carb-swap-today?t=636098)) \\ |
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| | The air cleaner element was installed, connected up the fuel line, and throttle cable. \\ |
| | (the return cable is not being used here because the pull spring is pretty stiff. If it were to stick, it can hit the kill button) \\ |
| | {{:techtalk:ref:carb:ih_cv_carb_swap_14_by_blight.jpg?direct&300|}} ((photo by BLIGHT of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/84301-40mm-cv-carb-swap-today?t=636098)) {{:techtalk:ref:carb:ih_cv_carb_swap_15_by_blight.jpg?direct&300|}} ((photo by BLIGHT of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/84301-40mm-cv-carb-swap-today?t=636098)) \\{{:techtalk:ref:carb:ih_cv_carb_swap_16_by_blight.jpg?direct&300|}} ((photo by BLIGHT of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/84301-40mm-cv-carb-swap-today?t=636098)) |
| | |
| | ====== Installing the VOES (if applicable) ====== |
| | This is not necessary, but here the VOES was attached to the new filter back plate. \\ |
| | {{:techtalk:ref:carb:ih_cv_carb_swap_5_by_blight.jpg?direct&300|}} ((photo by BLIGHT of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/84301-40mm-cv-carb-swap-today?t=636098)) {{:techtalk:ref:carb:ih_cv_carb_swap_6_by_blight.jpg?direct&300|}} ((photo by BLIGHT of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/84301-40mm-cv-carb-swap-today?t=636098)) \\ |
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| | Bolt up the carb using the rubberized flange adapter. \\ |
| | The VOES wiring reconnected. (one wire to ground, the other to the ignition (MSD) control unit for vacuum ignition retard). \\ |
| | An aluminum brace was fabricated to support the carb. \\ |
| | {{:techtalk:ref:carb:ih_cv_carb_swap_11_by_blight.jpg?direct&300|}} ((photo by BLIGHT of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/84301-40mm-cv-carb-swap-today?t=636098)) {{:techtalk:ref:carb:ih_cv_carb_swap_12_by_blight.jpg?direct&300|}} ((photo by BLIGHT of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/84301-40mm-cv-carb-swap-today?t=636098)) \\{{:techtalk:ref:carb:ih_cv_carb_swap_13_by_blight.jpg?direct&300|}} ((photo by BLIGHT of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/84301-40mm-cv-carb-swap-today?t=636098)) |
| | |
| | ====== Leg Room ====== |
| | These pics show the stock air filter protrusion from the gas tank. \\ |
| | {{:techtalk:ref:carb:ih_cv_carb_swap_7_by_blight.jpg?direct&300|}} ((photo by BLIGHT of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/84301-40mm-cv-carb-swap-today?t=636098)) {{:techtalk:ref:carb:ih_cv_carb_swap_8_by_blight.jpg?direct&300|}} ((photo by BLIGHT of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/84301-40mm-cv-carb-swap-today?t=636098)) \\ |
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| | ====== Pics of Conversions ====== |
| | {{:techtalk:ref:carb:cv_on_an_ironhead_1_by_ga_ironhead.jpg?direct&300|}} ((photo by GA_Ironhead of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/81692-quick-relpy-need-carb-fitment#post1684786)) {{:techtalk:ref:carb:cv_on_an_ironhead_2_by_ga_ironhead.jpg?direct&300|}} ((photo by GA_Ironhead of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/81692-quick-relpy-need-carb-fitment#post1684786)) \\ |
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