1926-1984 Vintage Models - S&S Cycle

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S e ction 5:S&S ®Parts forTwin Cam 96 /103 2007-2012Parts forTwin Cam 88 ®1999-2006Replacement Pinion GearsHigh quality S&S pinion gears are carefully machined, heat treated and thenfinish ground.Three distinct year groups, in up to eight different color coded sizes for optimum gear lash,are available for big twin engines. S&S color codes match Harley-Davidson® color codes sothat replacement is easy. Just pick the appropriate color S&S gear that matches the coloron the damaged stock gear (see notes).1926-1984 Vintage ModelsMid1954-’77Parts forEvolution ®1984-1999Parts forSportster ® & Buell ®1986-2012Parts forVintage Engines1926-1984PERFORMANCEPARTSNOTES:If the stock gear is unmarked and the size is unknown or you are scratch building anengine and have no gear, we recommend that you order a gear in the middle of the sizerange. These sizes were used more often and should provide adequate gear clearanceunder most circumstances. When in doubt, use a gear from the middle to the smallside of the range, because a combination of looser fitting smaller gears is less likely tocause binding and premature wear. Consult the chart for the size and appropriate partnumber required. If you wish to achieve optimum cam gear to pinion gear fit, consultyour factory service manual for instructions on fitting these gears before makinga selection. Some sizes, particularly those on and near the ends of each range, areavailable on a limited basis because they are the extremes.Late1977-’99Early1939-’53Parts forX-Wedge®2007-2012S&S® Big Twin style Pinion Gear Selection ChartParts forVictory®, Off-road& MetricYear ofPinionGearBiggest Average SmallestColor CodeS&S Part No.H-D® Part No.RacingProducts1939-'53Orange33-4101 USA–Black33-4102 USA(HD® #4010-51)Red––Blue33-4104 USA(HD® #24010-39)Green33-4105 USA(HD® #24010-39)White––Brown––Yellow––Tools & ShopSupplies1954-'77Orange33-4121 USA–Black33-4122 USA–Red33-4123 USA–Blue33-4124 USA–Green33-4125 USA(H-D® #24010-54)White33-4126 USA(HD® #24010-54)Brown33-4127 USA–Yellow33-4128 USA–Dealer Services& Promo Items1977-'89Orange33-4141 USA(H-D® #24040-78)White33-4142 USA(H-D® #24041-78)Yellow33-4143 USA USA 3 TÜV 6(H-D® #24042-78)Red33-4144 USA USA 1 TÜV 4,5(H-D® #24043-78)Blue33-4145 USA(H-D® #24044-78)Green33-4146 USA(H-D® #24045-78)Black33-4147 USA(H-D® #24046-78)Warranty &Company PolicyNOTE: All reference to H-D® part numbers is for identification purposes only. We in no way are implying that any of S&S Cycle’s products are original equipment parts or that they areequivalent to the corresponding H-D® part number shown.OEM Cross ReferenceAppendix & Index5-34Order toll free 866-244-2673
1926-1984 Vintage ModelsS&S ®Steel Rotary Breather GearsFor 1936-’84 Big TwinS&S steel rotary breather gears have better dimensional stability than plastic gears,especially at high temperatures. Abrasive particles are less likely to get embeddedin a steel gear body— embedded particles can damage the crankcase breather gearcavity. A screen provides better protection than a slotted gear— small particlesare stopped from getting to the gear cavity where they may damage the gears andoil pump. S&S steel rotary breather gear features a welded-in screen and largerdiameter holes, providing improved air flow/oil scavenging from the flywheelcavity. Crankcase flywheel cavity vacuum and oil scavenging are further improvedby optimized breather window timing. Breather oil trap scavenging is significantlyimproved by increased scavenge port duration.S&S steel rotary breather gears are available for all OHV engines from 1936-‘84 instandard and +.030" oversize for repair jobs where the cases have been damaged.Fitment• 1936-’84 OHV big twinsFeatures• All steel construction – superior dimensional stability, abrasion• Welded-in screen• Higher flow than stock• Elongated breather pocket scavenge hole for increased suctionOptions• Standard diameter for replacement or new builds• +.030" diameter for damaged engines• Breather gear only kits• Breather gear and shim kits106-5070Reduce oil leaks from knuckle valve cover "tins" with the high evacuation breather gear. Elongatedvacuum hole increases duration of suction on oil return suction passage, doubling oil return vacuum tothe top end. Better oil return, less leakage.S&S® High Evacuation Breather Gears For 1936-’47 Big TwinWith the high evacuation breather gear for knucklehead engines, we applied the same principleto the cylinder head return oil suction passage as we did to the breather pocket scavenge porton our other breather gears. By elongating that hole in the gear, the duration of vacuum onthe passage is increased. That allows more oil to be drawn from the "tins" and returned to thegearcase and ultimately to the oil tank. Getting more oil out of the tins reduces one of the mostcommon problems with knuckle engines – leaky tins.S&S® Breather Gears only for 1936-'99 Big TwinYear of Camshaft Standard Size +.030" Oversize1936-Early '47 106-5070 106-60121948-Early '7733-4246(H-D® #25313-73)33-4247Late 1977-'99 33-4241 TÜV 3(H-D® #25310-82A, 25313-77B)33-4242S&S® Breather Gear Kits for 1936-'99 Big TwinYear of Camshaft Standard Size +.030" Oversize1936-Early '47 106-6010 106-60131948-Early '77 33-4253 33-4263Late 1977-'99 33-4250 33-4260PERFORMANCEPARTSParts forTwin Cam 96 /103 2007-2012Parts forTwin Cam 88 ®1999-2006Parts forEvolution ®1984-1999Parts forSportster ® & Buell ®1986-2012Parts forVintage Engines1926-1984Parts forX-Wedge®2007-2012Parts forVictory®, Off-road& MetricRacingProducts33-4250Late 1977-’99Breather gear kits include breather gear and steelend play shim kit.Breather Gear Spacing Shims*+.100" thick ................................................33-42005 pack ................................................................33-1000+.110" thick (H-D® #25320-79) ....................................33-42015 pack ................................................................33-1001+.120" thick (H-D® #25322-79) ....................................33-42025 pack ................................................................33-1002+.130" thick (H-D® #25320-82, 25325-79) .............................33-4203+.140" thick (H-D® #25322-82, 25327-79) .............................33-42045 pack ................................................................33-1004+.150" thick (H-D® #25325-82) ....................................33-42055 pack ................................................................33-1005+.160" thick (H-D® #25327-82) .................................... 33-42065 pack ................................................................33-1006+.170" thick ................................................33-4207* These shims must be used with steel breather gears only.Breather Gear Spacing Shim KitFits stock 1979-’82 and all S&S® steel breather gears. Includes one of each thickness:.100", .110", .120", .130", .140", .150", .160", .170" ................... 33-4249Tools & ShopSuppliesDealer Services& Promo ItemsWarranty &Company PolicyOEM Cross ReferenceAppendix & IndexVisit us at www.sscycle.com5-35
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1926-1984 Vintage Models - S&S Cycle

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