Differences
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techtalk:ih:carb01r [2019/10/10 16:08] hippysmack [Idle Speed Adjustment] |
techtalk:ih:carb01r [2019/10/15 00:25] hippysmack [Main Jet] |
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| All year Keihin jet locations: \\ | All year Keihin jet locations: \\ | ||
| {{:techtalk:ih:carb:keihin_10_by_county_fair.jpg?direct&300|}} ((photo by County Fair of the XLFORUM http://xlforum.net/forums/showthread.php?s=9e387afdd8bddbd4444d18324d2d215c&t=1760294&page=3)) \\ | {{:techtalk:ih:carb:keihin_10_by_county_fair.jpg?direct&300|}} ((photo by County Fair of the XLFORUM http://xlforum.net/forums/showthread.php?s=9e387afdd8bddbd4444d18324d2d215c&t=1760294&page=3)) \\ | ||
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| + | ===== Installing an 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)) \\ | ||
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| + | 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|}} \\ | ||
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| + | 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. \\ | ||
| + | |||
| + | |{{: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|}}| | ||
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| ====== Accelerator Pump System ====== | ====== Accelerator Pump System ====== | ||
