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techtalk:evo:engmech03 [2019/07/29 17:38] hippysmack [Cylinders] |
techtalk:evo:engmech03 [2020/02/25 03:34] 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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====== Cylinders ====== | ====== Cylinders ====== | ||
- | ===== Sub Documents ===== | + | |
- | * [[techtalk:evo:engmech03a|Cylinder / Head Bolt Stud Issues and Repair]] | + | |
===== 1986-2003 EVO Cylinders ===== | ===== 1986-2003 EVO Cylinders ===== | ||
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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|----| | ||
+ | |||
+ | \\ | ||
+ | |||
+ | 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 ====== | ||
+ | |||
+ | 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)) \\ | ||
+ | |||
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. \\ | ||
+ | ====== Base Gasket ====== | ||
+ | 04-up: | ||
+ | Harley base gasket (HD 16789-04) measures .014" in thickness and comes in the top end kit (HD 17049-08). \\ | ||
+ | |||
+ | |||
+ | |||
+ | \\ | ||
[[:techtalk:menu|{{:techtalk:gototechnicalmenu.jpg|}}]] | [[:techtalk:menu|{{:techtalk:gototechnicalmenu.jpg|}}]] |