Differences
This shows you the differences between two versions of the page.
Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
techtalk:ref:svcproc20 [2019/01/09 03:36] ixl2relax ↷ Links adapted because of a move operation |
techtalk:ref:svcproc20 [2019/04/01 15:23] ixl2relax [Test Each Cylinder for Compression] |
||
---|---|---|---|
Line 1: | Line 1: | ||
[[:techtalk:menu|{{ :techtalk:gototechnicalmenu.jpg|}}]] | [[:techtalk:menu|{{ :techtalk:gototechnicalmenu.jpg|}}]] | ||
- | ====== REF: Troubleshooting - Engine - 03 ====== | + | ====== REF: Service Procedures 20 ====== |
====== Cylinder Compression Test ====== | ====== Cylinder Compression Test ====== | ||
A compression test should be done as part of each tune-up. Record the results and follow any changes over time. ((IronMick of the XLFORUM http://xlforum.net/forums/showthread.php?t=48311)) \\ | A compression test should be done as part of each tune-up. Record the results and follow any changes over time. ((IronMick of the XLFORUM http://xlforum.net/forums/showthread.php?t=48311)) \\ | ||
Line 22: | Line 22: | ||
- Ride the bike to get the engine up to operating temperature. ((IronMick of the XLFORUM http://xlforum.net/forums/showthread.php?t=48311)) | - Ride the bike to get the engine up to operating temperature. ((IronMick of the XLFORUM http://xlforum.net/forums/showthread.php?t=48311)) | ||
- Disconnect the power to the coil to prevent it from firing. | - Disconnect the power to the coil to prevent it from firing. | ||
- | * The extra two plugs (on dual plug heads) & wires can remain in place during this test. ((IXL2Relax of the XLFORUM http://xlforum.net/forums/showthread.php?t=2005378)) | + | * The extra two plugs (on dual plug heads) need to remain in place during this test. ((IXL2Relax of the XLFORUM http://xlforum.net/forums/showthread.php?t=2005378)) |
* If you can't disconnect power to the coil, ground out all the plug wires. | * If you can't disconnect power to the coil, ground out all the plug wires. | ||
- Clean the area around the spark plugs and remove them. ((79-85 HD XL/XR FSM pg 3-10)) | - Clean the area around the spark plugs and remove them. ((79-85 HD XL/XR FSM pg 3-10)) | ||
* If you haven't disconnected the coil, you can insert the plugs into the plug wires and press the plugs against the cylinder heads for grounding. ((IronMick of the XLFORUM http://xlforum.net/forums/showthread.php?t=48311)) | * If you haven't disconnected the coil, you can insert the plugs into the plug wires and press the plugs against the cylinder heads for grounding. ((IronMick of the XLFORUM http://xlforum.net/forums/showthread.php?t=48311)) | ||
- Connect the compression gauge to the first cylinder. | - Connect the compression gauge to the first cylinder. | ||
- | - Make sure the choke and throttle plate is closed before turning over the engine. | + | - Make sure the throttle plate (and choke, if present) is fully open before turning over the engine. |
* If using a CV carb, hold the slide up. ((aswracing http://xlforum.net/forums/showthread.php?t=26208&page=2)) | * If using a CV carb, hold the slide up. ((aswracing http://xlforum.net/forums/showthread.php?t=26208&page=2)) | ||
- | * If the cylinder can't freely pull in air, the compression reading will be low. | + | * If the cylinder can't freely pull in air, the compression reading will be low. |
+ | * Do NOT pull the enrichener knob - The enrichener is mis-named a choke but it is not a choke plate. | ||
- Crank the engine continuously through 5-7 compression strokes. (until there is no further increase in reading at the gauge) ((IronMick of the XLFORUM http://xlforum.net/forums/showthread.php?t=48311)) | - Crank the engine continuously through 5-7 compression strokes. (until there is no further increase in reading at the gauge) ((IronMick of the XLFORUM http://xlforum.net/forums/showthread.php?t=48311)) | ||
- Record the readings at the end of the first and last strokes for this cylinder. | - Record the readings at the end of the first and last strokes for this cylinder. |