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techtalk:ref:carb01w [2019/09/22 19:47] hippysmack [Screaming Eagle EVO XLH Hi-Flo Carb and Air Cleaner Kit (29081-90C)] |
techtalk:ref:carb01w [2019/09/23 03:08] hippysmack [Breather Options] |
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| ((http://xlforum.net/forums/showthread.php?t=132922)) | ((http://xlforum.net/forums/showthread.php?t=132922)) | ||
| *in carburetor \\ | *in carburetor \\ | ||
| + | |||
| + | ===== Starting ===== | ||
| + | **Choke**: \\ | ||
| + | The carburetor choke knob (enrichenor) should be pulled up for initial or cold starting. \\ | ||
| + | Push the knob down as soon as the engine is warm enough to run without stumbling. \\ | ||
| + | You can ride with the knob up for the first few blocks. | ||
| + | ===== Tuning ===== | ||
| + | **Air / fuel mixture**: \\ | ||
| + | The air/fuel mixture screw is set initially at one full turn outward from the full in position. \\ | ||
| + | Do not set idle speed or smoothness with this screw. The screw must be set within 1/8 turn of the one full turn position for optimum performance.\\ | ||
| + | **Engine Idle Speed**: \\ | ||
| + | Idle speed is set with the throttle stop screw. Set engine idle speed at 1000 - 1150 RPM with engine at normal operating temperature. \\ | ||
| + | **Accelerator pump**: \\ | ||
| + | If your engine has an off-idle hesitation, you may have to adjust the accelerator pump stroke. \\ | ||
| + | Do this by adjusting the accelerator pump screw after all other adjustments have been made. \\ | ||
| + | Off-idle hesitation can be caused by either a too lean or too rich pump stroke. So you will have to determine which way to turn the screw by experimenting. \\ | ||
| + | Turn the screw 1/4 turn at a time. \\ | ||
| + | **Jetting**: \\ | ||
| + | If your engine is relatively unmodified, it will run well with the jets that come in the carburetor. \\ | ||
| + | Depending on the level of performance modifications, it may run better with different size jets. \\ | ||
| + | See the jet chart above. \\ | ||
| + | NOTE: \\ | ||
| + | All the carburetor jets are slightly rich. If the engine runs too rich just off idle, use a #65 slow speed. \\ | ||
| + | If the engine is rough or jerky at 55-65 mph, remove the blank intermediate speed jet and install a | ||
| + | #80. \\ | ||
| Markings on the one below include: Keihin, 27F8, HG13, Harley Davidson and Screaming Eagle. ((Stardog of the XLFORUM http://xlforum.net/forums/showthread.php?t=1976237)) \\ | Markings on the one below include: Keihin, 27F8, HG13, Harley Davidson and Screaming Eagle. ((Stardog of the XLFORUM http://xlforum.net/forums/showthread.php?t=1976237)) \\ | ||
| Line 101: | Line 126: | ||
| * Dealers were to check their parts stock and replace any pump rods that measured short and also check the pump rod length on any motorcycles that exhibited a stumble upon acceleration. | * Dealers were to check their parts stock and replace any pump rods that measured short and also check the pump rod length on any motorcycles that exhibited a stumble upon acceleration. | ||
| - | ==== Breather Options ==== | ||
| - | |||
| - | |{{techtalk:ref:carb:breather_options_for_mikuni_by_c53.jpg?direct&300|}}|{{techtalk:ref:carb:breather_options_1_for_mikuni_by_jordan1200.jpg?direct&300|}}|{{techtalk:ref:carb:breather_options_2_for_mikuni_by_jordan1200.jpg?direct&300|}}| | ||
| - | |((photo by c53 of the XLFORUM http://xlforum.net/forums/showthread.php?t=14060&page=16))|The horseshoe pipe system over the top of the carb allows for easy access to the mixture screw.((photos by jordan1200 of the XLFORUM http://xlforum.net/forums/showthread.php?t=14060&page=16))|| | ||
