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techtalk:ref:carb07 [2019/10/14 23:58]
hippysmack
techtalk:ref:carb07 [2019/10/15 00:24]
hippysmack [Adjustable Main Jet (L76-87)]
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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:​idle_mixture_screw_location_by_popgadget-_annotated.jpg?​direct&​300|}} ((photo by popgadget ​of the XLFORUM, annotated by Hippysmack)) \\+{{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))
  
 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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 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|}} \\
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-====== Adjustable Main Jet (L76-87) ====== 
-There is an adjustable main jet available from J&P Cycles or others. \\ 
-These work great and you don't have to fool around jet guessing whether you have the right size main jet or not. \\ 
-They are simple to adjust. Just wind it up to about 65 MPH and run it in until it misses and back it out about a full turn. ((oldnavy of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=877868&​page=2)) \\  
- 
-This kit can be purchased online. It comes with an installation guide and index pointer. \\ 
-The tool marks inside of the float bowl (as installed) for drilling the proper sized hole to thread in the adjustable main jet.\\ 
-The kit can be purchased online. \\ 
-PDF instructions - [[http://​www.vtwinmfg.com/​instructions/​35/​35-0369.pdf]] \\ 
-{{:​techtalk:​ref:​carb:​keihin_butterfly_adjustable_main_jet_35-0369.jpg?​direct&​300|}} \\ 
- 
-This replaces the main jet (has to be removed). \\ 
-The float bowl has to be removed to install the adjustable main jet. \\ 
-A guide tool is included with the kit to install the new jet to properly index the carburetor float bowl. \\ 
-A index pointer is installed in the guide, bowl reinstalled and the pointer is pushed down from inside the venture to dimple the bowl. \\ 
-The bowl is once again removed and a 1/​16"​-1/​8"​ pilot hole is drilled followed by a 15/64" bit. \\ 
-After checking for burrs, removing the index tool and guide and cleaning up, the adjustable jet is installed in the float bowl. \\ 
-(partially unscrew the small '​T'​ handle so that the needle in the adjustable jet is not exposed to accidental damage) \\ 
-Remove the nut from the adjustable jet, insert the jet through the 15/64" hole drilled earlier. \\ 
-Then re-tighten the bowl and gently screw in the '​T'​ handle to the needle seat and then back it out 4 turns. \\ 
-Finer tuning can be achieved by reading the spark plugs and small adjustments to the “T” handle. \\ 
-This adjustable jet eliminates the chore of carrying and continually changing different main jets with every change in exhaust system or air cleaner. \\ 
-The hole in the bowl for the '​T'​ handle jet has to be indexed correctly in order for this to work. \\ 
-The adjustable main jet is designed to operate in conjunction with a 1.80 main jet included with the kit. \\ 
-Make sure you record or remember the number of turns off the seat and back off the '​T'​ handle before removing the float bowl later. \\ 
-This will help prevent needle / jet interference when the float bowl is reinstalled. \\ 
-For initial adjustment (standard pipes and A/C) it's recommended that the adjustment needle be backed out four (4) turns from the seat. 
-The adjustable jet set screw is turned in, towards the float bowl to lean the fuel/air mixture and out from the float bowl to richen the mixture. \\ 
-Check plugs frequently after jet adjustment, exhaust or A/C to avoid too lean or too rich conditions. \\ 
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-|{{:​techtalk:​ref:​carb:​kehien_butterfly_carb_1_by_leucadiaguit_-_cropped.jpg?​direct&​300|}}|{{:​techtalk:​ref:​carb:​kehien_butterfly_carb_2_by_leucadiaguit_-_cropped.jpg?​direct&​300|}}|