Noticed a vibration yesterday...
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Outstanding HDF Member
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From: SoCal hi desert
Noticed a vibration yesterday...
Went for a nice ride to Yucca Valley and Pioneertown yesterday. The bike ran great but I noticed when I hit a rise big enough to unload the suspension a bit I could feel a vibration in the seat but not the bars. Didn't do it going down the road-smooth as glass then. It's a very definite sensation-like the engine is contacting the frame at that point or something. Any thoughts?
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Outstanding HDF Member
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From: SoCal hi desert
Road Captain
Joined: Nov 2009
Posts: 535
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From: Hertfordshire UK
Sit and take your time, look for witness/chaffing marks, you will see something if its making contact.
Try also jacking your bike up, to release the pressure of the rear suspention/swing arm, making sure its strapped down, turn rear wheel maybe even start it then run on tick over in gear (be carefull)
Try also jacking your bike up, to release the pressure of the rear suspention/swing arm, making sure its strapped down, turn rear wheel maybe even start it then run on tick over in gear (be carefull)
Last edited by Arv; May 30, 2010 at 09:24 AM.
Outstanding HDF Member
Joined: Sep 2006
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From: Florida
Evo's come in both A and B configurations. But I assume you are discussing the bike in your sig pic. It is a Dyna and an "A" motor.
How many miles have you personally put on the bike? All Dynas vibrate under different circumstances. It is in their personality. If the bike is new to you, don't drive yourself nuts yet.
The first thing I would do is take a heavy screwdriver and tap the bit of the screwdriver on the head of the bolt of every motor mount. If one has loosened much you will notice it by the sound.
If the bike is new to you or how many miles are on it. It might be worth setting it on the jack and starting at the front, woirk your way back checking every fastener. Take a hard look at the suspension if the miles are gettting up there on it.
Remember though, if it is new to you and you just noticed it. Dynas vibrate. Some in strange ways under different conditons and speeds.
How many miles have you personally put on the bike? All Dynas vibrate under different circumstances. It is in their personality. If the bike is new to you, don't drive yourself nuts yet.
The first thing I would do is take a heavy screwdriver and tap the bit of the screwdriver on the head of the bolt of every motor mount. If one has loosened much you will notice it by the sound.
If the bike is new to you or how many miles are on it. It might be worth setting it on the jack and starting at the front, woirk your way back checking every fastener. Take a hard look at the suspension if the miles are gettting up there on it.
Remember though, if it is new to you and you just noticed it. Dynas vibrate. Some in strange ways under different conditons and speeds.
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Outstanding HDF Member
Joined: Mar 2010
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From: SoCal hi desert
Evo's come in both A and B configurations. But I assume you are discussing the bike in your sig pic. It is a Dyna and an "A" motor.
How many miles have you personally put on the bike? All Dynas vibrate under different circumstances. It is in their personality. If the bike is new to you, don't drive yourself nuts yet.
The first thing I would do is take a heavy screwdriver and tap the bit of the screwdriver on the head of the bolt of every motor mount. If one has loosened much you will notice it by the sound.
If the bike is new to you or how many miles are on it. It might be worth setting it on the jack and starting at the front, woirk your way back checking every fastener. Take a hard look at the suspension if the miles are gettting up there on it.
Remember though, if it is new to you and you just noticed it. Dynas vibrate. Some in strange ways under different conditons and speeds.
How many miles have you personally put on the bike? All Dynas vibrate under different circumstances. It is in their personality. If the bike is new to you, don't drive yourself nuts yet.
The first thing I would do is take a heavy screwdriver and tap the bit of the screwdriver on the head of the bolt of every motor mount. If one has loosened much you will notice it by the sound.
If the bike is new to you or how many miles are on it. It might be worth setting it on the jack and starting at the front, woirk your way back checking every fastener. Take a hard look at the suspension if the miles are gettting up there on it.
Remember though, if it is new to you and you just noticed it. Dynas vibrate. Some in strange ways under different conditons and speeds.
The odo shows 70k, the seller claimed the engine was rebuilt 7k ago. It runs great, doesn't leak or make any weird sounds. I've only had it a month and yesterday was the first ride of any real distance. It gave me a chance to really get the feel of it and that was the only thing I noticed that seemed out of what I would consider normal.
I will do the screwdriver/bolt check.
My last Harley ride was 30 years ago on my rigid pan so it's been a while but I know about Harleys vibrating-that's part of the charm!
Tourer
Joined: May 2010
Posts: 350
Likes: 1
From: Floridia
"It's normal, wait that's and evo, we don't work on those." If it's when the rear suspension is unloaded, it could be the swingare/trans mount getting a little sloppy. They don't last forever.
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Outstanding HDF Member
Joined: Sep 2006
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From: Florida
Your bike has an unbalanced, rubber mounted motor by design.
At 70,000 miles the suspension has had a fair amount of miles. I would put it on the jack and give it a good once over. By now everything has loosened up and some things may be getting sloppy.
At 70,000 miles the suspension has had a fair amount of miles. I would put it on the jack and give it a good once over. By now everything has loosened up and some things may be getting sloppy.
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From: Escondido, CA
You guys are riding an EVO. They vibrate. There is no A and B motor. There is just an EVO. The Dynas and Touring models are rubber mounted. The Softails are rigid or hard mounted. You're going to feel vibrations through the bike especially on the rigid mounted Softails. The vibes change depending on suspension load and unload and RPMs. That's why Kuryakyn came out with the ISO stuff. It was made to isolate the vibes from the rider. Enjoy your ride.