Differences

This shows you the differences between two versions of the page.

--- techtalk:ref:carb07 [2021/08/09 01:32]
ixl2relax [Idle Speed Screw]
+++ techtalk:ref:carb07 [2024/01/11 23:28]
hippysmack
@@ Line 1: / Line 1: @@
 [[:techtalk:menu|{{  :techtalk:gototechnicalmenu.jpg|}}]]
 ====== REF: Carburetor, Intake Manifold & Exhaust ======
-====== Keihin Carb Upgrades - Butterfly and CV Types ======
+====== Keihin Carb Upgrades & Aftermarket - For Butterfly and CV Types ======
 \\
 ====== Idle Speed Screw ======
+**Factory Idle Speed Screw - Modding**\\
+You can stick a dime in the adjuster screw slot and braze it to the screw to make future adjustments by hand. \\
+{{:techtalk:ref:carb:keihin_carb_1_by_ddddylan_-_annotated.jpg?direct&300|}} ((photo by DDDDylan of the XLFORUM, annotated by Hippysmack))
 **CVP Extended Idle Speed Screw**\\
@@ Line 15: / Line 20: @@
 |{{:techtalk:ref:carb:cv_carb_with_extended_idle_speed_screw_by_hippysmack.jpg?direct&300|}}|
-**Factory Idle Speed Screw - Modding**\\
-You can stick a dime in the adjuster screw slot and braze it to the screw to make future adjustments by hand. \\
-{{:techtalk:ref:carb:keihin_carb_1_by_ddddylan_-_annotated.jpg?direct&300|}} ((photo by DDDDylan of the XLFORUM, annotated by Hippysmack))
+\\
+====== Needle & Emulsion Tube ======
 \\
+Changes in the needle and emulsion tubes from aftermarket vendors may modify the (stock/oem) AFR from just off idle thru wide-open throttle. The length and size of the needle as it moves thru the needle jet along with the size and placement of the holes in the emulsion tube, will determine the air-fuel ratio of the fuel. Along with the other operating parts of the carb, they affect how well the engine operates under each varying condition.
+CV Performance offers two aftermarket needles, Velocity & N65, and one emulsion tube, Velocity. The CVP N65 is designed as an equivalent alternative to the Keihin N65C needle, which HD & Keihin have stopped producing. The Velocity Needle & Velocity Emulsion tube are designed to provide a different AFR.
+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 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 ======
@@ Line 61: / Line 73: @@
-**IMS Mods**\\
+**CVP Easy-Just IMS - Modding**\\
+From RandallM of the XLForum((Post#80 - http://xlforum.net/forums/showthread.php?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|}}
+**Factory IMS - Modding**\\
 Several mods to the thumbscrew have been done to make counting turns while turning the screw easier. \\
-|The aftermarket thumb screw head doesn't a slot for a screwdriver (which also serves as a visual for position). \\ 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 http://xlforum.net/forums/showthread.php?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|}}|
@@ Line 82: / Line 102: @@
 |{{:techtalk:evo:carb:idle_mixture_screw_mod_by_folkie.jpg?direct&300|}}|
-**Factory IMS - Modding**
+**Factory IMS - Modded Head**
 This was done to extend the factory idle mixture screw. \\
@@ Line 89: / Line 109: @@
 |  Factory idle mixture screw extended. ((photos by tchuck of the XLFORUM http://xlforum.net/forums/showthread.php?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|}}|
 \\
@@ Line 98: / Line 119: @@
 "Bolt-on performance that installs in minutes" although no performance enhancements have been found while using them. \\
 Aluminum type velocity stacks like the "V-Ductor" from CV Performance have been used and tested to find no HP gains from them.
-Some may still cite 'peace of mind' and there is no downside to using it other than the price.
+Some may still cite 'peace of mind' and there is no downside to using it other than the price. \\
 It requires a total of 2 gaskets (included) to install. ((photos by Hippysmack)) \\

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