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techtalk:evo:engmech03 [2019/08/01 03:50] hippysmack [Sub Documents] |
techtalk:evo:engmech03 [2020/02/25 03:17] hippysmack [Gaskets] |
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| [[:techtalk:menu|{{ :techtalk:gototechnicalmenu.jpg|}}]] | [[:techtalk:menu|{{ :techtalk:gototechnicalmenu.jpg|}}]] | ||
| ====== EVO: Engine Mechanicals ====== | ====== EVO: Engine Mechanicals ====== | ||
| + | \\ | ||
| + | ====== Cylinders, Heads, Pistons & Rods ====== | ||
| + | |||
| + | ===== Sub Documents ===== | ||
| + | * [[techtalk:evo:engmech03a|Cylinder / Head Bolt Issues and Repair]] | ||
| + | * [[techtalk:evo:engmech03b|Time-Sert Repair on Engine Case Cylinder / Head Stud Hole]] | ||
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| |0.030 OS Bore|3.0328 in|3.3828 in|3.530 in| | |0.030 OS Bore|3.0328 in|3.3828 in|3.530 in| | ||
| |0.040 OS Bore|3.0428 in|3.3928 in|----| | |0.040 OS Bore|3.0428 in|3.3928 in|----| | ||
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| + | \\ | ||
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| + | Take note:\\ | ||
| + | Since the 2009 model year, the 883 cylinder construction changed dramatically and you can no longer bore them to 1200 at all.((aswracing comment at http://xlforum.net/forums/showthread.php?t=1569673)) | ||
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| ====== Heads ====== | ====== Heads ====== | ||
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| + | Torque Sequence: \\ | ||
| + | {{:techtalk:evo:engmech:head_torque_sequence_by_hippysmack.jpg?direct&300|}} ((photo by Hippysmack http://xlforum.net/forums/showthread.php?p=5793537#post5793537)) \\ | ||
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| If you put an 88-03 style piston into an 04+ bike, the skirt on the side will smack into the oil squirter and break it off. \\ | If you put an 88-03 style piston into an 04+ bike, the skirt on the side will smack into the oil squirter and break it off. \\ | ||
| It's a full tear down to fix. ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=1842712&highlight=rocker+box&page=3)) \\ | It's a full tear down to fix. ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=1842712&highlight=rocker+box&page=3)) \\ | ||
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| ====== Pushrods ====== | ====== Pushrods ====== | ||
| + | ====== Gaskets ====== | ||
| + | Gasket thicknesses are especially useful when setting squish clearance. ((Tomcatt of the XLFORUM)) \\ | ||
| + | The squish band is the quench area. ((rocketmangb of the XLFORUM http://xlforum.net/forums/showthread.php?t=2075731&page=13)) \\ | ||
| + | The idea is to create turbulence in the chamber which helps the fuel air mix blend and distribute in the chamber. \\ | ||
| + | So the squish is determined by the length of the barrels and the gaskets PLUS the deck height of the cases from crankshaft centerline. \\ | ||
| + | (assuming the rods and pistons are correct) to the cylinder base) \\ | ||
| + | You can buy several different brands / thickness i.e., (.010" and .020" base gaskets) and (.030" and .040") etc. head gaskets to get the desired numbers. \\ | ||
| + | [[techtalk:ref:svcproc26|See more on the squish band here]] in the REF section of the Sportsterpedia. \\ | ||
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| [[:techtalk:menu|{{:techtalk:gototechnicalmenu.jpg|}}]] | [[:techtalk:menu|{{:techtalk:gototechnicalmenu.jpg|}}]] | ||
