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techtalk:ref:carb07 [2022/03/31 21:17]
hippysmack [Velocity Stack]
techtalk:ref:carb07 [2024/01/12 00:02] (current)
hippysmack
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 |Long idle speed screw on a Keihin CV. ((photo by Hippysmack))| |Long idle speed screw on a Keihin CV. ((photo by Hippysmack))|
 |{{:​techtalk:​ref:​carb:​cv_carb_with_extended_idle_speed_screw_by_hippysmack.jpg?​direct&​300|}}| |{{:​techtalk:​ref:​carb:​cv_carb_with_extended_idle_speed_screw_by_hippysmack.jpg?​direct&​300|}}|
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 \\ \\
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 Using unknown parts or parts designed to radically alter the carb operation to favor one specific enhancement will often complicate or degrade the overall smooth operation of the carb. Using unknown parts or parts designed to radically alter the carb operation to favor one specific enhancement will often complicate or degrade the overall smooth operation of the carb.
  
-{{:​techtalk:​ref:​carb:​cvp-partsforcv40-1.jpg?​600|}} ((pics from BestCoastXL at http://​xlforum.net/​forums/showthread.php?t=2079965 - Annotated by IXL2Relax)) +{{:​techtalk:​ref:​carb:​cvp-partsforcv40-1.jpg?​600|}} ((pics from BestCoastXL at https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-intake-and-exhaust/​sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/​202758-should-i-buy-carb-parts-from-amazon-rather-than-cv-performance-no-you-should-not?t=2079965 - Annotated by IXL2Relax))
  
 ====== Idle Mixture Screw - IMS - Aftermarket & Mods ====== ====== Idle Mixture Screw - IMS - Aftermarket & Mods ======
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 Then pry the plug out using a pick or you could twist a small sheet metal screw into the hole to pull the plug out. \\ Then pry the plug out using a pick or you could twist a small sheet metal screw into the hole to pull the plug out. \\
 With the plug removed clean the area around the mixture screw so no metal fragments remain. \\ With the plug removed clean the area around the mixture screw so no metal fragments remain. \\
-{{techtalk:​evo:​carb:​cv40-imscap-drillbit.jpg?​300|}} ((photo by cantolina of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?t=14949)) Circled area is where you drill out the plug. {{:​techtalk:​ref:​carb:​cv_carb_bottom_by_cantolina.jpg?​direct&​300|}} ((photo by cantolina of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?t=14949))+{{techtalk:​evo:​carb:​cv40-imscap-drillbit.jpg?​300|}} ((photo by cantolina of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-intake-and-exhaust/​sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/​9621-carb-adjusting-where-are-the-jets-and-the-mixture-screw?t=14949)) Circled area is where you drill out the plug. {{:​techtalk:​ref:​carb:​cv_carb_bottom_by_cantolina.jpg?​direct&​300|}} ((photo by cantolina of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-intake-and-exhaust/​sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/​9621-carb-adjusting-where-are-the-jets-and-the-mixture-screw?t=14949))
  
 The EZ-Just mixture screw must be threaded in completely (lightly seated) prior to backing out and making final adjustments. \\ The EZ-Just mixture screw must be threaded in completely (lightly seated) prior to backing out and making final adjustments. \\
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 If you take off the bowl, be sure to check the float setting before reinstalling the bowl. \\ If you take off the bowl, be sure to check the float setting before reinstalling the bowl. \\
  
-|  EZ-Just Screw in it's '​lightly seated'​ position. ((photo by Matt Black of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=2068828&​page=6)) ​ ||+|  EZ-Just Screw in it's '​lightly seated'​ position. ((photo by Matt Black of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-intake-and-exhaust/​sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/​193103-newbie-cv-rebuild/​page6?​t=2068828&​page=6)) ​ ||
 |{{:​techtalk:​ref:​carb:​ez_screw_lightly_seated_1_by_matt_black.jpg?​direct&​300|}}|{{:​techtalk:​ref:​carb:​ez_screw_lightly_seated_2_by_matt_black.jpg?​direct&​300|}}| |{{:​techtalk:​ref:​carb:​ez_screw_lightly_seated_1_by_matt_black.jpg?​direct&​300|}}|{{:​techtalk:​ref:​carb:​ez_screw_lightly_seated_2_by_matt_black.jpg?​direct&​300|}}|
  
 |Comparison to OEM. ((photo by Hippysmack))| ​ As installed on bottom of carb. ((photos by Hippysmack)) ​ || |Comparison to OEM. ((photo by Hippysmack))| ​ As installed on bottom of carb. ((photos by Hippysmack)) ​ ||
 |{{:​techtalk:​ref:​carb:​ez-just_88-06_a-f_mixture_screw_1_by_hippysmack.jpg?​direct&​300|}} ((photo byHippysmack))| {{:​techtalk:​ref:​carb:​ez-just_88-06_a-f_mixture_screw_2_by_hippysmack.jpg?​direct&​300|}} ((photo byHippysmack))|{{:​techtalk:​ref:​carb:​ez-just_88-06_a-f_mixture_screw_3_by_hippysmack.jpg?​direct&​300|}} ((photo byHippysmack))| |{{:​techtalk:​ref:​carb:​ez-just_88-06_a-f_mixture_screw_1_by_hippysmack.jpg?​direct&​300|}} ((photo byHippysmack))| {{:​techtalk:​ref:​carb:​ez-just_88-06_a-f_mixture_screw_2_by_hippysmack.jpg?​direct&​300|}} ((photo byHippysmack))|{{:​techtalk:​ref:​carb:​ez-just_88-06_a-f_mixture_screw_3_by_hippysmack.jpg?​direct&​300|}} ((photo byHippysmack))|
 +
 +
 +**CVP Easy-Just IMS - Modding**\\
 +
 +From RandallM of the XLForum((Post#​80 - https://​www.xlforum.net/​forum/​sportster-motorcycle-forum/​sportster-motorcycle-intake-and-exhaust/​sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/​203772-jet-hole-size-chart?​t=2081062)) - Here is how I indexed my screw. I filed some small flats on a small nail, and JB Welded it in the slot. I left the small end sticking out a bit so I can feel both ends.
 +
 +{{techtalk:​ref:​carb:​cvp-easyjust-ims-mod6.jpg?​direct&​300|}}
  
  
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 Several mods to the thumbscrew have been done to make counting turns while turning the screw easier. \\ Several mods to the thumbscrew have been done to make counting turns while turning the screw easier. \\
  
-|The aftermarket thumb screw head doesn'​t have a slot for a screwdriver (which can serve for visual positioning). \\ A small hole drilled off center will give a visual position of the screw for adjustment later. ((photos by sifty of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=1592463&​page=48))|| ​+|The aftermarket thumb screw head doesn'​t have a slot for a screwdriver (which can serve for visual positioning). \\ A small hole drilled off center will give a visual position of the screw for adjustment later. ((photos by sifty of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​146604-first-harley-1975-xl1000-caf%C3%A9-project/​page48?​t=1592463&​page=48))|| ​
 |{{:​techtalk:​evo:​carb:​idle_mixture_screw_3_by_sifty.jpg?​direct&​300|}}|{{:​techtalk:​evo:​carb:​idle_mixture_screw_4_by_sifty.jpg?​direct&​300|}}| |{{:​techtalk:​evo:​carb:​idle_mixture_screw_3_by_sifty.jpg?​direct&​300|}}|{{:​techtalk:​evo:​carb:​idle_mixture_screw_4_by_sifty.jpg?​direct&​300|}}|
  
-This replacement needle makes it so much easier to adjust the idle mixture. ((Folkie of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?t=183642)) \\+This replacement needle makes it so much easier to adjust the idle mixture. ((Folkie of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-intake-and-exhaust/​sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/​47776-idle-mixture-needle-mod?t=183642)) \\
 However, it is easier to count the turns by hand with this mod. \\ However, it is easier to count the turns by hand with this mod. \\
 A spigot was added to the face of the knob. \\ A spigot was added to the face of the knob. \\
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 Then the side nearest the air cleaner (right of bike) was marked to index when to stop turning to the right. \\ Then the side nearest the air cleaner (right of bike) was marked to index when to stop turning to the right. \\
 The needle was then removed, drilled and tapped (10 BA) for the spigot. \\ The needle was then removed, drilled and tapped (10 BA) for the spigot. \\
-You can also drill hole through the knob from side to side and Superglue a screw in it. ((Hot Rod Sporty of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?t=183642)) \\+You can also drill hole through the knob from side to side and Superglue a screw in it. ((Hot Rod Sporty of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-intake-and-exhaust/​sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/​47776-idle-mixture-needle-mod?t=183642)) \\
  
 The EZ-Just makes it easy to adjust the idle mixture by hand without a screwdriver. \\ The EZ-Just makes it easy to adjust the idle mixture by hand without a screwdriver. \\
-But, if you've gone 3 to 3-1/2 turns out, then change to the next biggest slow jet. ((Folkie of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?t=183642)) \\+But, if you've gone 3 to 3-1/2 turns out, then change to the next biggest slow jet. ((Folkie of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-intake-and-exhaust/​sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/​47776-idle-mixture-needle-mod?t=183642)) \\
  
  
-|  Spigot installed to count the turns. ((photo by Folkie of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=183642)) ​ |+|  Spigot installed to count the turns. ((photo by Folkie of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-intake-and-exhaust/​sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/​47776-idle-mixture-needle-mod?​t=183642)) ​ |
 |{{:​techtalk:​evo:​carb:​idle_mixture_screw_mod_by_folkie.jpg?​direct&​300|}}| |{{:​techtalk:​evo:​carb:​idle_mixture_screw_mod_by_folkie.jpg?​direct&​300|}}|
  
Line 100: Line 105:
 A piece of 3/16" brass tubing and a knurled nut from the hardware store. \\ A piece of 3/16" brass tubing and a knurled nut from the hardware store. \\
  
-|  Factory idle mixture screw extended. ((photos by tchuck of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=183642)) ​ ||+|  Factory idle mixture screw extended. ((photos by tchuck of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-intake-and-exhaust/​sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/​47776-idle-mixture-needle-mod?​t=183642)) ​ ||
 |{{:​techtalk:​evo:​carb:​idle_mixture_screw_mod_2_by_tchuck.jpg?​direct&​300|}}|{{:​techtalk:​evo:​carb:​idle_mixture_screw_mod_3_by_tchuck.jpg?​direct&​300|}}| |{{:​techtalk:​evo:​carb:​idle_mixture_screw_mod_2_by_tchuck.jpg?​direct&​300|}}|{{:​techtalk:​evo:​carb:​idle_mixture_screw_mod_3_by_tchuck.jpg?​direct&​300|}}|
  
Line 124: Line 129:
  
 |{{:​techtalk:​ref:​carb:​velocity_stack_3_by_hippysmack.jpg?​direct&​300|}}|{{:​techtalk:​ref:​carb:​velocity_stack_4_by_hippysmack.jpg?​direct&​300|}}|{{:​techtalk:​ref:​carb:​velocity_stack_5_by_hippysmack.jpg?​direct&​300|}}| |{{:​techtalk:​ref:​carb:​velocity_stack_3_by_hippysmack.jpg?​direct&​300|}}|{{:​techtalk:​ref:​carb:​velocity_stack_4_by_hippysmack.jpg?​direct&​300|}}|{{:​techtalk:​ref:​carb:​velocity_stack_5_by_hippysmack.jpg?​direct&​300|}}|
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 ====== Replacing the Plastic Fuel Inlet Fitting with a Brass 90 Degree Fitting ====== ====== Replacing the Plastic Fuel Inlet Fitting with a Brass 90 Degree Fitting ======
Line 137: Line 140:
 |{{:​techtalk:​ref:​carb:​cv_fuel_inlet_elbow_mod_7_by_hippysmack.jpg?​direct&​300|}}| |{{:​techtalk:​ref:​carb:​cv_fuel_inlet_elbow_mod_7_by_hippysmack.jpg?​direct&​300|}}|
  
-|  Keihin butterfly (non CV). Here is on way to do it. Break the plastic off and run a hose on the factory brass nipple. ((photos by Hopper of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=209347&​highlight=float+level&​page=21)) ​ |||+|  Keihin butterfly (non CV). Here is on way to do it. Break the plastic off and run a hose on the factory brass nipple. ((photos by Hopper of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​50355-and-yet-another-77-ground-up-rebuild/​page21?​t=209347&​highlight=float+level&​page=21)) ​ |||
 |{{:​techtalk:​ref:​carb:​keihin_butterfly_carb_23_by_hopper.jpg?​direct&​300|}}|{{:​techtalk:​ref:​carb:​keihin_butterfly_carb_24_by_hopper.jpg?​direct&​300|}}|{{:​techtalk:​ref:​carb:​keihin_butterfly_carb_25_by_hopper.jpg?​direct&​300|}}| |{{:​techtalk:​ref:​carb:​keihin_butterfly_carb_23_by_hopper.jpg?​direct&​300|}}|{{:​techtalk:​ref:​carb:​keihin_butterfly_carb_24_by_hopper.jpg?​direct&​300|}}|{{:​techtalk:​ref:​carb:​keihin_butterfly_carb_25_by_hopper.jpg?​direct&​300|}}|
  
 Replacing the the hipple with a brass elbow is detailed below. \\ Replacing the the hipple with a brass elbow is detailed below. \\
 +
 ===== Tools ===== ===== Tools =====
  
Line 153: Line 157:
 {{:​techtalk:​ref:​carb:​cv_fuel_inlet_elbow_mod_tools_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack)) {{:​techtalk:​ref:​carb:​cv_fuel_inlet_elbow_mod_tools_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack))
 ===== Part Considerations ===== ===== Part Considerations =====
- 
   * Brass 90° elbow   * Brass 90° elbow
  
Line 238: Line 241:
 I pre-made puller was bought for the pics below. \\ I pre-made puller was bought for the pics below. \\
 But you can also use a 1/​4'​x20 threaded rod about a foot long screwed into the fitting. \\ But you can also use a 1/​4'​x20 threaded rod about a foot long screwed into the fitting. \\
-Then slip a thin piece of pipe nipple over the rod with a washer and nut onto the end of the rod. ((tgrover of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?t=501871)) \\+Then slip a thin piece of pipe nipple over the rod with a washer and nut onto the end of the rod. ((tgrover of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​72657-what-carb-is-this-and-how-do-i-set-it-up?t=501871)) \\
  
 Place the spacer (or deep socket) over the brass nipple. \\ Place the spacer (or deep socket) over the brass nipple. \\
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 A socket may be used as a spacer with the appropriate length bolt. \\ A socket may be used as a spacer with the appropriate length bolt. \\
-{{:​techtalk:​ref:​carb:​socket_as_spacer_for_removing_cv_carb_inlet_by_matt_black.jpg?​direct&​300|}} ((photo by Matt Black of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?p=5685578&​highlight=fuel+inlet+elbow#​post5685578)) \\+{{:​techtalk:​ref:​carb:​socket_as_spacer_for_removing_cv_carb_inlet_by_matt_black.jpg?​direct&​300|}} ((photo by Matt Black of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-intake-and-exhaust/​sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/​193103-newbie-cv-rebuild/​page7?​highlight=fuel+inlet+elbow#​post4213142)) \\
  
 {{:​techtalk:​ref:​carb:​cv_fuel_inlet_elbow_mod_17_by_hippysmack.jpg?​direct&​300|}} {{:​techtalk:​ref:​carb:​cv_fuel_inlet_elbow_mod_18_by_hippysmack.jpg?​direct&​300|}} {{:​techtalk:​ref:​carb:​cv_fuel_inlet_elbow_mod_19_by_hippysmack.jpg?​direct&​300|}} ​ {{:​techtalk:​ref:​carb:​cv_fuel_inlet_elbow_mod_17_by_hippysmack.jpg?​direct&​300|}} {{:​techtalk:​ref:​carb:​cv_fuel_inlet_elbow_mod_18_by_hippysmack.jpg?​direct&​300|}} {{:​techtalk:​ref:​carb:​cv_fuel_inlet_elbow_mod_19_by_hippysmack.jpg?​direct&​300|}} ​
Line 279: Line 282:
 Blow the passage out again to ensure of no debris before installing the bowl. ((photos by Hippysmack)) \\ Blow the passage out again to ensure of no debris before installing the bowl. ((photos by Hippysmack)) \\
 {{:​techtalk:​ref:​carb:​cv_fuel_inlet_elbow_mod_40_by_hippysmack.jpg?​direct&​300|}} {{:​techtalk:​ref:​carb:​cv_fuel_inlet_elbow_mod_41_by_hippysmack.jpg?​direct&​300|}} {{:​techtalk:​ref:​carb:​cv_fuel_inlet_elbow_mod_42_by_hippysmack.jpg?​direct&​300|}} \\ {{:​techtalk:​ref:​carb:​cv_fuel_inlet_elbow_mod_40_by_hippysmack.jpg?​direct&​300|}} {{:​techtalk:​ref:​carb:​cv_fuel_inlet_elbow_mod_41_by_hippysmack.jpg?​direct&​300|}} {{:​techtalk:​ref:​carb:​cv_fuel_inlet_elbow_mod_42_by_hippysmack.jpg?​direct&​300|}} \\
-