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techtalk:ref:svcproc21 [2019/05/30 22:55]
hippysmack [Leak-Down Test vs Compression Test]
techtalk:ref:svcproc21 [2021/07/31 22:43]
hippysmack [Engine Prep]
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 **Put the transmission in high gear and hold / lock the rear brakes**: **Put the transmission in high gear and hold / lock the rear brakes**:
-  * During the leak-down test, when you apply the air pressure to the cylinder, the piston will try to be driven downward. If allowed to move, it can quickly turn the engine over, while turning the rear wheel. (How much the bike will jump depends on the gauge/​pressure you're using.)+  * During the leak-down test, when you apply the air pressure to the cylinder, the piston will try to be driven downward. ​\\ If allowed to move, it can quickly turn the engine over, while turning the rear wheel. (How much the bike will jump depends on the gauge/​pressure you're using.)
   * Therefore, secure the wheel by applying the rear brakes or it will just turn over the engine and open the exhaust valve. ((skyboltdan of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=48311))   * Therefore, secure the wheel by applying the rear brakes or it will just turn over the engine and open the exhaust valve. ((skyboltdan of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=48311))
  
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-  * The actual numbers are not as important as the relationship of each cylinder. As long as both juggs are close to each other, don't sweat the actual readings. There are lots of variables that can affect those readings. ((scottfisher of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=48311&​page=3))+  * The actual numbers are not as important as the relationship of each cylinder. As long as both jugs are close to each other, don't sweat the actual readings. There are lots of variables that can affect those readings. ((scottfisher of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=48311&​page=3))
   * Make a note of the reading and the date you took it, check it again after a few rides and see if it reads the same using the same equipment. ((scottfisher of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=48311&​page=3))   * Make a note of the reading and the date you took it, check it again after a few rides and see if it reads the same using the same equipment. ((scottfisher of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=48311&​page=3))