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techtalk:ref:genmsr05 [2023/08/01 14:32] hippysmack [Primary] |
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| See also [[techtalk:ref:genmsr06#using_a_stethoscope_or_other_to_hunt_down_engine_noises|Using a Stethoscope or Other to Hunt Down Engine Noises]] in the REF section of the Sportsterpedia. \\ | See also [[techtalk:ref:genmsr06#using_a_stethoscope_or_other_to_hunt_down_engine_noises|Using a Stethoscope or Other to Hunt Down Engine Noises]] in the REF section of the Sportsterpedia. \\ | ||
| - | Noise and Vibration are normal for a Harley. ((Recon Dad of the XLFORUM http://xlforum.net/forums/showthread.php?t=823082)) \\ | + | Noise and Vibration are normal for a Harley. ((Recon Dad of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/efi-sportster-motorcycle-talk-2007-and-up/97463-engine-noise?t=823082)) \\ |
| - | In fact, they are an amalgamation of vibration, sort of a syncopated pandemonium. ((Ireeman of the XLFORUM http://xlforum.net/forums/showthread.php?t=2072940&page=3)) \\ | + | In fact, they are an amalgamation of vibration, sort of a syncopated pandemonium. ((Ireeman of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-general-discussion-and-problems/196416-what%C2%92s-that-sound/page3?t=2072940&page=3)) \\ |
| - | Harmful noises are hard to determine without a well trained ear and these engines make a lot of noise anyway. ((milmat1 of the XLFORUM http://xlforum.net/forums/showthread.php?p=1902363&highlight=stethoscope#post1902363)) \\ | + | Harmful noises are hard to determine without a well trained ear and these engines make a lot of noise anyway. ((milmat1 of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/72005-knocking-apparently-big-end?highlight=stethoscope#post1506806)) \\ |
| Plus the sound travels through the cases to places other than where it originates. \\ | Plus the sound travels through the cases to places other than where it originates. \\ | ||
| So critical listening is a must as a noise on one side of the engine may sound more like another area instead. \\ | So critical listening is a must as a noise on one side of the engine may sound more like another area instead. \\ | ||
| - | There was an article in Cycle World back in '83 that said the noises a healthy Ironhead makes would be considered terminal on other makes. ((83XLX of the XLFORUM http://xlforum.net/forums/showthread.php?t=832376)) \\ | + | There was an article in Cycle World back in '83 that said the noises a healthy Ironhead makes would be considered terminal on other makes. ((83XLX of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/98047-ironhead-noise?t=832376)) \\ |
| In becoming familiar with the "normal" noises, you can just keep an ear out for abnormal ones as you're speeding down the road. \\ | In becoming familiar with the "normal" noises, you can just keep an ear out for abnormal ones as you're speeding down the road. \\ | ||
| - | They all sound a little different though, which is really unique. ((fergerburger of the XLFORUM http://xlforum.net/forums/showthread.php?t=832376)) \\ | + | They all sound a little different though, which is really unique. ((fergerburger of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/98047-ironhead-noise?t=832376)) \\ |
| - | Of course the closer you are to the point of origin of a noise the louder it will be. ((Ferrous Head of the XLFORUM http://xlforum.net/forums/showthread.php?t=977525&page=4)) \\ | + | Of course the closer you are to the point of origin of a noise the louder it will be. ((Ferrous Head of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/107497-using-a-stethoscope-to-listen-to-the-engine/page4?t=977525&page=4)) \\ |
| You sometimes get random noises too and they are generally chassis related. \\ | You sometimes get random noises too and they are generally chassis related. \\ | ||
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| Larger bearings like mains "rumble" when they are worn, but also if they aren't getting enough oil for whatever reason. \\ | Larger bearings like mains "rumble" when they are worn, but also if they aren't getting enough oil for whatever reason. \\ | ||
| - | | Mechanic stethoscope. ((photos by asasial of the XLFORUM http://xlforum.net/forums/showthread.php?t=977525&page=3)) | A wooden dowel for a listening tool. ((photos by Hippysmack)) | | + | | Mechanic stethoscope. ((photos by asasial of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/107497-using-a-stethoscope-to-listen-to-the-engine/page3?t=977525&page=3)) | A wooden dowel for a listening tool. ((photos by Hippysmack)) | |
| |{{:techtalk:ref:tools:stethoscope_1_by_asasial.jpg?direct&300|}}|{{:techtalk:ref:tools:listening_stick_2_by_hippysmack.jpg?direct&300|}}| | |{{:techtalk:ref:tools:stethoscope_1_by_asasial.jpg?direct&300|}}|{{:techtalk:ref:tools:listening_stick_2_by_hippysmack.jpg?direct&300|}}| | ||
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| ===== Critical Listening ===== | ===== Critical Listening ===== | ||
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| If you find that it is an internal engine noise, don't go straight to your tool box and put your blinders on. ((HD Tech Tip dated April 1986)) \\ | If you find that it is an internal engine noise, don't go straight to your tool box and put your blinders on. ((HD Tech Tip dated April 1986)) \\ | ||
| It's hard to check oil pressure, cylinder compression, timing or locate the noise if the motor is in now little pieces. \\ | It's hard to check oil pressure, cylinder compression, timing or locate the noise if the motor is in now little pieces. \\ | ||
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| ====== Comparing Noises From Other Bikes ====== | ====== Comparing Noises From Other Bikes ====== | ||
| - | Imports are liquid cooled, and that in and of itself kills a lot of engine noise that would normally get to your ears due to: ((DG_Sportster of the XLFORUM http://xlforum.net/forums/showthread.php?t=823082)) \\ | + | Imports are liquid cooled, and that in and of itself kills a lot of engine noise that would normally get to your ears due to: ((DG_Sportster of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/efi-sportster-motorcycle-talk-2007-and-up/97463-engine-noise?t=823082)) \\ |
| * Closer tolerances allowed by liquid cooling. | * Closer tolerances allowed by liquid cooling. | ||
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| ====== Noise From Vibration ====== | ====== Noise From Vibration ====== | ||
| - | Harley-Davidson uses a common crank pin, meaning that both pistons travel up and down together at the same time. ((xllent01 of the XLFORUM http://xlforum.net/forums/showthread.php?t=1721404)) \\ | + | Harley-Davidson uses a common crank pin, meaning that both pistons travel up and down together at the same time. ((xllent01 of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-general-discussion-and-problems/160409-rpm-related-vibrations?t=1721404)) \\ |
| So all the weight is being thrown back and forth causing vibrations and the very particular “proprietary” sound or rumble. \\ | So all the weight is being thrown back and forth causing vibrations and the very particular “proprietary” sound or rumble. \\ | ||
| Keeping the motor above 3000 rpm's will smooth the vibrations out dramatically. \\ | Keeping the motor above 3000 rpm's will smooth the vibrations out dramatically. \\ | ||
| - | We can learn to live with it if we know what some of the symptoms are, or we can try to reduce it in many ways. ((xllent01 of the XLFORUM http://xlforum.net/forums/archive/index.php/t-3983.html)) \\ | + | We can learn to live with it if we know what some of the symptoms are, or we can try to reduce it in many ways. ((xllent01 of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-general-discussion-and-problems/2652-what-s-all-the-deal-about-vibration)) \\ |
| Look for loose fasteners and hardware. \\ | Look for loose fasteners and hardware. \\ | ||
| The engine and transmission mounts that are loose especially the top motor mount. | The engine and transmission mounts that are loose especially the top motor mount. | ||
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| Timing can cause vibrations. \\ | Timing can cause vibrations. \\ | ||
| - | A lot of the vibration depends on the rpm and gear you are riding in. These motors do not like to be lugged. ((BWP 5p of the XLFORUM http://xlforum.net/forums/showthread.php?t=27701&page=27)) \\ | + | A lot of the vibration depends on the rpm and gear you are riding in. These motors do not like to be lugged. ((BWP 5p of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/rubber-mount-sportster-motorcycle-talk-2004-2006/16552-vibration-problem-solved-check-your-front-engine-mount-bolt/page27?t=27701&page=27)) \\ |
| Move the timing 1 degree more advanced and test ride. Then move it one degree retarded from original setting and test ride. \\ | Move the timing 1 degree more advanced and test ride. Then move it one degree retarded from original setting and test ride. \\ | ||
| - | You will find you can tune out some vibrations at certain rpms moving the timing slightly. ((Shu of the XLFORUM http://xlforum.net/forums/showthread.php?t=1662083)) \\ | + | You will find you can tune out some vibrations at certain rpms moving the timing slightly. ((Shu of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/frame-mount-evo-sportster-talk-1986-2003-models/154889-speed-and-vibration?t=1662083)) \\ |
| Tires can cause vibrations. \\ | Tires can cause vibrations. \\ | ||
| - | Worn or under-inflated tires can develop cupping in the tread that can create a lot of vibes. ((Hexlobular of the XLFORUM http://xlforum.net/forums/showthread.php?t=1662083&page=2)) \\ | + | Worn or under-inflated tires can develop cupping in the tread that can create a lot of vibes. ((Hexlobular of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/frame-mount-evo-sportster-talk-1986-2003-models/154889-speed-and-vibration/page2?t=1662083&page=2)) \\ |
| You might not notice them all the time, but they can create a buzzy ride at certain speeds. \\ | You might not notice them all the time, but they can create a buzzy ride at certain speeds. \\ | ||
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| \\ | \\ | ||
| - | * **Symptom: Rattling Noise on Primary Side**. \\ Conv90 submitted video of noise from the primary side: \\ | + | * **Symptom: Rattling Noise**. \\ Conv90 submitted video of noise from the primary side: \\ |
| - | {{ :video:buell_noise_video_by_conv90.mp4 |}} | + | {{:video:buell_noise_video_by_conv90.mp4|}} |
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| + | * **Symptom: Rattling Noise**. \\ The tensioner shoe can be loose and rock side to side enough to sound like a lifter problem. It will rock fore and aft into the primary cover. \\ From the cam side of the bike, it'll sound like it's a lifter bouncing around. It's a slow intermittent hollow banging noise. It may only make noise at idle when the chain is least tight. \\ | ||
| + | * **Condition: Loose Primary Chain Adjuster Shoe**. \\ Below is a short video by Conv90 of the XLFORUM showing the hollow noise created. | ||
| + | |||
| + | {{:video:primary_chain_adjuster_shoe_noise_by_conv90.mp4|}} | ||
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| + | \\ | ||
| * **Symptom: An extra and constant noise inside of the primary case**. \\ An extra and constant noise inside of the primary case (even / after adjustment of the primary chain adjuster). ((Spor-T-1 of the XLFORUM http://xlforum.net/forums/showthread.php?t=29865)) \\ **Condition: Loose compensator nut / flywheel sprocket shaft nut**. \\ Once the sprocket on that shaft gets loose enough, it will chew the end of your fly wheel. ((dodgenbullets of the XLFORUM http://xlforum.net/forums/showthread.php?t=29865)) If this is the case your motor must come out and the cases split to fix it. \\ | * **Symptom: An extra and constant noise inside of the primary case**. \\ An extra and constant noise inside of the primary case (even / after adjustment of the primary chain adjuster). ((Spor-T-1 of the XLFORUM http://xlforum.net/forums/showthread.php?t=29865)) \\ **Condition: Loose compensator nut / flywheel sprocket shaft nut**. \\ Once the sprocket on that shaft gets loose enough, it will chew the end of your fly wheel. ((dodgenbullets of the XLFORUM http://xlforum.net/forums/showthread.php?t=29865)) If this is the case your motor must come out and the cases split to fix it. \\ | ||
