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techtalk:ref:genmsr05 [2024/01/15 19:14] hippysmack |
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| ===== Front Forks ===== | ===== Front Forks ===== | ||
| - | At a full stop with the bike idling, you apply the front brake and the bike gets a vibration like a buzz in frequency. ((wedge of the XLFORUM http://xlforum.net/forums/showthread.php?t=1680285&highlight=forks+vibrate)) \\ | + | At a full stop with the bike idling, you apply the front brake and the bike gets a vibration like a buzz in frequency. ((wedge of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-drivetrain/sportster-motorcycle-tires-wheels-and-brakes-aa/157028-vibration-front-brake?t=1680285&highlight=forks+vibrate)) \\ |
| It disappears when you release the brake lever, and comes back as soon as you apply the brake. \\ | It disappears when you release the brake lever, and comes back as soon as you apply the brake. \\ | ||
| - | As the engine rotates (picture the crank moving) the inertia tries to move the bike slightly fore and aft. ((racerwill of the XLFORUM http://xlforum.net/forums/showthread.php?t=1680285&highlight=forks+vibrate)) \\ | + | As the engine rotates (picture the crank moving) the inertia tries to move the bike slightly fore and aft. ((racerwill of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-drivetrain/sportster-motorcycle-tires-wheels-and-brakes-aa/157028-vibration-front-brake?t=1680285&highlight=forks+vibrate)) \\ |
| The wheel absorbs this motion by rolling very slightly , maybe 1/16" or less. \\ | The wheel absorbs this motion by rolling very slightly , maybe 1/16" or less. \\ | ||
| By applying the front brake, you stop the movement of the tire so the oscillations of inertia go to the forks and back into the bike. \\ | By applying the front brake, you stop the movement of the tire so the oscillations of inertia go to the forks and back into the bike. \\ | ||
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| Vibration in the forks can appear like a dance or like the forks are about to break. \\ | Vibration in the forks can appear like a dance or like the forks are about to break. \\ | ||
| This can shake the brake pad(s) or lights, mirrors and any part on the front can be subject to making noise. \\ | This can shake the brake pad(s) or lights, mirrors and any part on the front can be subject to making noise. \\ | ||
| + | |||
| ===== Motor Mounts ===== | ===== Motor Mounts ===== | ||
| - | Engine mounts may very well be the most ignored maintenance point. ((cantolina of the XLFORUM http://xlforum.net/forums/showthread.php?t=27701&page=3)) \\ | + | Engine mounts may very well be the most ignored maintenance point. ((cantolina 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/page3?t=27701&page=3)) \\ |
| You can loosen them after working on the engine, run the bike to let the engine "settle in" to the mounts and then torque'em back down. \\ | You can loosen them after working on the engine, run the bike to let the engine "settle in" to the mounts and then torque'em back down. \\ | ||
| It may help with vibration issues. \\ | It may help with vibration issues. \\ | ||
| - | You can also torque the motor mount bolts and put a small line (fine permanent marker) across the bolt and the nut. ((MikeGV of the XLFORUM http://xlforum.net/forums/showthread.php?t=27701&page=24)) \\ | + | You can also torque the motor mount bolts and put a small line (fine permanent marker) across the bolt and the nut. ((MikeGV 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/page24?t=27701&page=24)) \\ |
| That way can easily spot if the bolt/nut has moved and loosened. \\ | That way can easily spot if the bolt/nut has moved and loosened. \\ | ||
| ==== Ironheads / Rigid mount Evos ==== | ==== Ironheads / Rigid mount Evos ==== | ||
| - | + | The frame mount sporty is designed to get rigidity from the engine mounted to the frame. ((sep69 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/128772-motor-mount-question?highlight=cracked+head+motor+mount#post2973264)) \\ | |
| - | The frame mount sporty is designed to get rigidity from the engine mounted to the frame. ((sep69 of the XLFORUM http://xlforum.net/forums/showthread.php?p=4069288&highlight=cracked+head+motor+mount#post4069288)) \\ | + | |
| Loosing one mount therefore will weaken the overall construction (and increase vibration). | Loosing one mount therefore will weaken the overall construction (and increase vibration). | ||
| - | The reason for so many engine mounts is also rotational loads the engine develops. ((tmack-1 of the XLFORUM http://xlforum.net/forums/showthread.php?p=4069288&highlight=cracked+head+motor+mount#post4069288)) \\ | + | The reason for so many engine mounts is also rotational loads the engine develops. ((tmack-1 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/128772-motor-mount-question?highlight=cracked+head+motor+mount#post2973264)) \\ |
| Something like when a muscle car shakes the engine when you rev it. \\ | Something like when a muscle car shakes the engine when you rev it. \\ | ||
| If you are building a bike, chances are you will make performance mod's to the engine. \\ | If you are building a bike, chances are you will make performance mod's to the engine. \\ | ||
| Line 121: | Line 121: | ||
| **Symptom**: \\ | **Symptom**: \\ | ||
| - | Vibration, growing stronger with higher RPMs, can be violent. ((boneheaddoctor of the XLFORUM http://xlforum.net/forums/showthread.php?p=4610630&highlight=motor+mount+noise#post4610630)) \\ | + | Vibration, growing stronger with higher RPMs, can be violent. ((boneheaddoctor of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/158202-vibration/page2?highlight=motor+mount+noise#post3359324)) \\ |
| **Condition**: \\ | **Condition**: \\ | ||
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| Make certain all the mount bolts are not only there, but are properly torqued as well. \\ | Make certain all the mount bolts are not only there, but are properly torqued as well. \\ | ||
| One bolt can make that much of a difference. \\ | One bolt can make that much of a difference. \\ | ||
| + | |||
| ==== Rubber mount Evos ==== | ==== Rubber mount Evos ==== | ||
| There shouldn't be that much vibration on rubbermount bikes. \\ | There shouldn't be that much vibration on rubbermount bikes. \\ | ||
| - | You should feel some but not enough to make your feet numb. ((gronk62 of the XLFORUM http://xlforum.net/forums/showthread.php?t=27701&page=6)) \\ | + | You should feel some but not enough to make your feet numb. ((gronk62 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/page6?t=27701&page=6)) \\ |
| - | Keeping the motor mounts in specs makes all the difference in the world. ((Bill2 of the XLFORUM http://xlforum.net/forums/showthread.php?t=27701&page=12)) \\ | + | Keeping the motor mounts in specs makes all the difference in the world. ((Bill2 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/page12?t=27701&page=12)) \\ |
| **Tip**: If your mirrors are blurry, check your motor mounts. \\ | **Tip**: If your mirrors are blurry, check your motor mounts. \\ | ||
| - | The front motor mounts are notorious for loosening up. ((Toejam503 of the XLFORUM http://xlforum.net/forums/showthread.php?p=5713261&highlight=loose+motor+mount#post5713261)) \\ | + | The front motor mounts are notorious for loosening up. ((Toejam503 of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-general-discussion-and-problems/195355-vibration-during-acceleration?highlight=loose+motor+mount#post4251983)) \\ |
| Also check the condition of all the motor mount rubber isolators, they can deteriorate from age. \\ | Also check the condition of all the motor mount rubber isolators, they can deteriorate from age. \\ | ||
| - | If you over tighten the front mount, you're compressing the mount making it stiffer. ((A_Ride_4_ever of the XLFORUM http://xlforum.net/forums/showthread.php?t=27701&page=28)) \\ | + | If you over tighten the front mount, you're compressing the mount making it stiffer. ((A_Ride_4_ever 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/page28?t=27701&page=28)) \\ |
| This leads to less give and a much higher chance of cracking the front mount. \\ | This leads to less give and a much higher chance of cracking the front mount. \\ | ||
| - | Check the large thru bolt (1" hex head) in the front rubber motor mount. ((ron1200c of the XLFORUM http://xlforum.net/forums/showthread.php?t=27701)) \\ | + | Check the large thru bolt (1" hex head) in the front rubber motor mount. ((ron1200c 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?t=27701)) \\ |
| - | It's in the front of your bike below the voltage regulator under the oil filter. ((xena of the XLFORUM http://xlforum.net/forums/showthread.php?t=27701&page=4)) \\ | + | It's in the front of your bike below the voltage regulator under the oil filter. ((xena 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/page4?t=27701&page=4)) \\ |
| There's your rubber mount with the big bolt going through it. \\ | There's your rubber mount with the big bolt going through it. \\ | ||
| If there is no thread showing where the nut is on the bolt, check tightness. \\ | If there is no thread showing where the nut is on the bolt, check tightness. \\ | ||
| - | Threads are normally past the end of the nut ranging from 1-2 threads to 1-1/2" or so. ((garbiker of the XLFORUM http://xlforum.net/forums/showthread.php?t=27701&page=5)) ((dave of the XLFORUM http://xlforum.net/forums/showthread.php?t=27701&page=8)) \\ | + | Threads are normally past the end of the nut ranging from 1-2 threads to 1-1/2" or so. ((garbiker 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/page5?t=27701&page=5)) ((dave 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/page8?t=27701&page=8)) \\ |
| So if it's flush or so you may need to retighten it or at least check it. \\ | So if it's flush or so you may need to retighten it or at least check it. \\ | ||
| - | As long as it's up to torque (and Loctite was applied), you're good. ((dave of the XLFORUM http://xlforum.net/forums/showthread.php?t=27701&page=8)) \\ | + | As long as it's up to torque (and Loctite was applied), you're good. ((dave 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/page8?t=27701&page=8)) \\ |
| You can remove the right foot peg and rear brake pedal to gain access to the nut. \\ | You can remove the right foot peg and rear brake pedal to gain access to the nut. \\ | ||
| - | You may only need to take the bolts out of the front peg mount and rotate it out of the way to get a torque wrench on that nut. ((clayvis of the XLFORUM http://xlforum.net/forums/showthread.php?t=27701&page=4)) \\ | + | You may only need to take the bolts out of the front peg mount and rotate it out of the way to get a torque wrench on that nut. ((clayvis 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/page4?t=27701&page=4)) \\ |
| You can used an open end wrench on the bolt head also. \\ | You can used an open end wrench on the bolt head also. \\ | ||
| - | Also, when looking at the front lower motor mounts from under the bike, the rubber mounts seem to sag downward just a bit. ((GlockDoc of the XLFORUM http://xlforum.net/forums/showthread.php?t=27701&page=28)) \\ | + | Also, when looking at the front lower motor mounts from under the bike, the rubber mounts seem to sag downward just a bit. ((GlockDoc 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/page28?t=27701&page=28)) \\ |
| This should be somewhat normal as the engine puts downward pressure on the mount when setting. \\ | This should be somewhat normal as the engine puts downward pressure on the mount when setting. \\ | ||
| - | Both front and rear mounts can sag like this. ((JohnK of the XLFORUM http://xlforum.net/forums/showthread.php?t=27701&page=29)) \\ | + | Both front and rear mounts can sag like this. ((JohnK 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/page29?t=27701&page=29)) \\ |
| The rears you can't tell from the outside but when you remove the swingarm, you can see the pivot pin is not centered. \\ | The rears you can't tell from the outside but when you remove the swingarm, you can see the pivot pin is not centered. \\ | ||
| You can swap the rear rubbers left to right and the pin will be centered again. \\ | You can swap the rear rubbers left to right and the pin will be centered again. \\ | ||
| Line 159: | Line 160: | ||
| However, this won't work with front mounts because they are LH and RH parts. \\ | However, this won't work with front mounts because they are LH and RH parts. \\ | ||
| - | | Front lower motor mount bolt. ((photo by salukidawg of the XLFORUM http://xlforum.net/forums/showthread.php?t=27701&page=21)) | 1 year old (2011) 1200C front mount sag. ((photo by GlockDoc of the XLFORUM http://xlforum.net/forums/showthread.php?t=27701&page=28)) | | + | | Front lower motor mount bolt. ((photo by salukidawg 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/page21?t=27701&page=21)) | 1 year old (2011) 1200C front mount sag. ((photo by GlockDoc 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/page28?t=27701&page=28)) | |
| |{{:techtalk:ref:genmsr:04_motor_mount_bolt_by_salukidawg.jpg?direct&200|}}|{{:techtalk:ref:genmsr:2011_1200c_front_motor_mount_by_glockdoc.jpg?direct&300|}}| | |{{:techtalk:ref:genmsr:04_motor_mount_bolt_by_salukidawg.jpg?direct&200|}}|{{:techtalk:ref:genmsr:2011_1200c_front_motor_mount_by_glockdoc.jpg?direct&300|}}| | ||
| - | Check the top isolator link mount bolts (the ones that bolt to top of the front head). ((gronk62 of the XLFORUM http://xlforum.net/forums/showthread.php?t=27701&page=4)) \\ | + | Check the top isolator link mount bolts (the ones that bolt to top of the front head). ((gronk62 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/page4?t=27701&page=4)) \\ |
| If they come loose, add some blue Loctite to the threads and re-torque them. \\ | If they come loose, add some blue Loctite to the threads and re-torque them. \\ | ||
