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techtalk:ref:carb01w [2019/09/22 19:46] hippysmack [Basic Keihin BD (Screaming Eagle or Flowmaster) Information] |
techtalk:ref:carb01w [2019/09/23 03:20] hippysmack [Tuning] |
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|27895-87 |70 | | |27895-87 |70 | | ||
|27897-78 |72 | | |27897-78 |72 | | ||
- | ((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. \\ | ||
+ | **Flanged model** \\ | ||
+ | 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)) \\ | ||
{{:techtalk:ref:carb:se_carb_1_by_stardog.jpg?direct&300|}} ((photo by Stardog of the XLFORUM http://xlforum.net/forums/showthread.php?t=1976237)) {{:techtalk:ref:carb:se_carb_3_by_stardog.jpg?direct&300|}} ((photo by Stardog of the XLFORUM http://xlforum.net/forums/showthread.php?t=1976237)) \\ | {{:techtalk:ref:carb:se_carb_1_by_stardog.jpg?direct&300|}} ((photo by Stardog of the XLFORUM http://xlforum.net/forums/showthread.php?t=1976237)) {{:techtalk:ref:carb:se_carb_3_by_stardog.jpg?direct&300|}} ((photo by Stardog of the XLFORUM http://xlforum.net/forums/showthread.php?t=1976237)) \\ | ||
{{:techtalk:ref:carb:se_carb_2_by_stardog.jpg?direct&300|}} ((photo by Stardog of the XLFORUM http://xlforum.net/forums/showthread.php?t=1976237)) {{:techtalk:ref:carb:se_carb_4_by_stardog.jpg?direct&300|}} ((photo by Stardog of the XLFORUM http://xlforum.net/forums/showthread.php?t=1976237)) \\ | {{:techtalk:ref:carb:se_carb_2_by_stardog.jpg?direct&300|}} ((photo by Stardog of the XLFORUM http://xlforum.net/forums/showthread.php?t=1976237)) {{:techtalk:ref:carb:se_carb_4_by_stardog.jpg?direct&300|}} ((photo by Stardog of the XLFORUM http://xlforum.net/forums/showthread.php?t=1976237)) \\ | ||
+ | |||
+ | **Spigot model**: \\ | ||
+ | Markings on this one include: PA40C and CE16. ((Goozgaz of the XLFORUM http://xlforum.net/forums/showthread.php?t=1710327)) \\ | ||
+ | {{:techtalk:ref:carb:se_carb_1_by_goozgaz.jpg?direct&250|}} ((photo by Goozgaz of the XLFORUM http://xlforum.net/forums/showthread.php?t=1710327)) {{:techtalk:ref:carb:se_carb_2_by_goozgaz.jpg?direct&250|}} ((photo by Goozgaz of the XLFORUM http://xlforum.net/forums/showthread.php?t=1710327)) \\ | ||
+ | |||
+ | {{:techtalk:ref:carb:se_carb_3_by_goozgaz.jpg?direct&250|}} ((photo by Goozgaz of the XLFORUM http://xlforum.net/forums/showthread.php?t=1710327)) {{:techtalk:ref:carb:se_carb_4_by_goozgaz.jpg?direct&250|}} ((photo by Goozgaz of the XLFORUM http://xlforum.net/forums/showthread.php?t=1710327)) \\ | ||
==== Accelerator Pump ==== | ==== Accelerator Pump ==== | ||
Line 102: | Line 133: | ||
* 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))|| | ||