Differences
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techtalk:evo:carb01 [2020/09/16 05:05] ixl2relax [Sub Documents] |
techtalk:evo:carb01 [2023/11/17 13:29] hippysmack [Keihin Butterfly (non-CV) Carburetor (Stock on L1976-1987 Sportsters)] |
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| ====== Keihin Butterfly (non-CV) Carburetor (Stock on L1976-1987 Sportsters) ====== | ====== Keihin Butterfly (non-CV) Carburetor (Stock on L1976-1987 Sportsters) ====== | ||
| + | See also in the Sportsterpedia: \\ | ||
| + | * [[techtalk:ih:carb01#keihin_butterfly_or_non-cv_carb_late_1976-1987|Keihin Butterfly Carb Basic Information]] | ||
| + | * [[techtalk:ih:carb01q|Rebuilding the Keihin Butterfly Carb]] | ||
| + | * [[techtalk:ih:carb01p|Keihin Butterfly Carb Identificaton]] | ||
| + | * [[techtalk:miscres:miscres05#tsb_650-699|See TSB #694 for introduction information on the Keihin butterfly carb]]. \\ Click the link to view the TSB page in the Sportsterpedia. Then click on the "Y" next to #694 to view / download the PDF. \\ | ||
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| * The Keihin non-CV carburetor is a horizontal type with a fuel bowl, single ring-shaped float, an accelerating pump, idle mixture adjusting needle and a throttle stop screw for speed adjustment. ((1970-1978 HD XL/XLH/XLCH/XLT 1000 FSM)) | * The Keihin non-CV carburetor is a horizontal type with a fuel bowl, single ring-shaped float, an accelerating pump, idle mixture adjusting needle and a throttle stop screw for speed adjustment. ((1970-1978 HD XL/XLH/XLCH/XLT 1000 FSM)) | ||
| * The throttle body casting contains an integral venturi and a fuel valve seat that is pressed into the body. The underside of the throttle body contains a boss. The main jet screws into the boss and holds the bleed tube in place.((1970-1978 HD XL/XLH/XLCH/XLT 1000 FSM)) | * The throttle body casting contains an integral venturi and a fuel valve seat that is pressed into the body. The underside of the throttle body contains a boss. The main jet screws into the boss and holds the bleed tube in place.((1970-1978 HD XL/XLH/XLCH/XLT 1000 FSM)) | ||
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| |HDI/Aust/Eng/Japan|2001|27749-01|185 / 42|(27185-90) - (27171-89)|(27647-01)| | |HDI/Aust/Eng/Japan|2001|27749-01|185 / 42|(27185-90) - (27171-89)|(27647-01)| | ||
| |HDI/Aust/Eng/Japan|2002-2003|27749-01A|185 / 42|(27185-90) - (27171-89)|(27647-01)| | |HDI/Aust/Eng/Japan|2002-2003|27749-01A|185 / 42|(27185-90) - (27171-89)|(27647-01)| | ||
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| + | \\ | ||
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| + | ===== Slow & Main Jets - P/N & Comparisons ===== | ||
| + | |||
| + | ^ Chart of Slow (Pilot) Jet Size Differences ||||||| | ||
| + | | Number | HD Part # | MM | Dia Inches | Area Inch² | %+ of\\ Prev Jet | %± of\\ 42 Jet | | ||
| + | ^ ||||||| | ||
| + | | Keihin 35 | 27117-88 | 0.35 | 0.013780 | 0.0001491 | ~~ | -30.56 | | ||
| + | | Keihin 40 | 27281-92 | 0.40 | 0.015748 | 0.0001947 | 30.61 | -9.30 | | ||
| + | | Keihin 42 | 27171-89 | 0.42 | 0.016535 | 0.0002146 | 10.25 | --TYP-- | | ||
| + | | Keihin 45 | 27170-89 | 0.45 | 0.017717 | 0.0002464 | 14.80 | 14.80 | | ||
| + | | Keihin 48 | 27165-90 | 0.48 | 0.018898 | 0.0002803 | 13.78 | 30.61 | | ||
| + | | ||||||| | ||
| + | | Keihin 44 | CV-Perf | 0.44 | 0.017323 | 0.0002356 | | 9.75 | | ||
| + | | Keihin 46 | CV-Perf | 0.46 | 0.018110 | 0.0002575 | | 19.95 | | ||
| + | | Keihin 50 | CV-Perf | 0.50 | 0.019685 | 0.0003042 | | 41.72 | | ||
| + | | ||||||| | ||
| + | | CV-Perf is for CV-Performance.com ||||||| | ||
| + | | Keihin P/N for above listed jets is N424-25B-XX <-- where XX is the size ||||||| | ||
| + | | The N424-25B-XX series jets have 0.8mm bleed (cross) holes ||||||| | ||
| + | | ||||||| | ||
| + | ^ Chart of Main Jet Size Differences ||||||| | ||
| + | | Number | HD Part # | MM | Dia Inches | Area Inch² | %+ of\\ Prev Jet | %± of\\ 170 Jet | | ||
| + | ^ ||||||| | ||
| + | | Keihin 160 | 27152-89 | 1.60 | 0.062992 | 0.0031149 | ~~ | -11.42 | | ||
| + | | Keihin 165 | 27116-88 | 1.65 | 0.064961 | 0.0033126 | 6.35 | -5.80 | | ||
| + | | Keihin 170 | 27115-88 | 1.70 | 0.066929 | 0.0035164 | 6.15 | --TYP-- | | ||
| + | | Keihin 175 | 27090-89 | 1.75 | 0.068898 | 0.0037263 | 5.97 | 5.97 | | ||
| + | | Keihin 180 | 27114-88 | 1.80 | 0.070866 | 0.0039423 | 5.80 | 12.11 | | ||
| + | | Keihin 185 | 27185-90 | 1.85 | 0.072835 | 0.0041643 | 5.63 | 18.43 | | ||
| + | | Keihin 190 | 27243-95 | 1.90 | 0.074803 | 0.0043925 | 5.48 | 24.91 | | ||
| + | | Keihin 195 | 27275-96Y | 1.95 | 0.076772 | 0.0046267 | 5.33 | 31.57 | | ||
| + | | Keihin 200 | 27105-88 | 2.00 | 0.078740 | 0.0048670 | 5.19 | 38.41 | | ||
| + | | ||||||| | ||
| + | | Keihin P/N for above listed jets is N424-27-XXX <-- where XXX is the size ||||||| | ||
| + | | Area Inch² = 3.14 * DiaInches/2 * DiaInches/2 = π*r² ||||||| | ||
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