Vibration
Thread Starter
|
Stage IV
Joined: Aug 2018
Posts: 4
Likes: 0
From: Binghamton, NY
Vibration
My 2018 Fat Boy 114 has developed a vibration that was not there before. At about 2300 rpm it starts and by 2500 rpm it is more severe and an audible "hum" is present.
Could this have anything to do with the oil issue?
I plan to check the levels this week end.
Thanks.
Could this have anything to do with the oil issue?
I plan to check the levels this week end.
Thanks.
Cruiser
Joined: Aug 2018
Posts: 109
Likes: 12
From: south Texas
Need more description. Vibration through the handlebars or seat? Is the source of the hum you're hearing from the engine? Does it seem to be more on one side than the other? Can you feel this vibration only in gear moving or can it be felt in neutral if you rev the engine to 2500.
Thread Starter
|
Stage IV
Joined: Aug 2018
Posts: 4
Likes: 0
From: Binghamton, NY
Vibration
RobertJO,
The vibration seems to come from both the handle bars and seat, though I noticed
it first in the handle bars. I can't tell where the sound is coming from yet,
but will check this weekend.
When shifting, I can feel it in the rpm ranges from 2300 and up as I shift, so
it is in all gears and not a tire or belt issue. Going downhill at 70 mph
(about 2500 rpm), the vibration and sound stop when the clutch is disengaged.
At 70 mph, the engine still feels normal...I can punch it and get the
acceleration as usual, but there seems to be a drag and the hum is still
present.
Is it possible that the noise and vibration are coming from the transmission
and/or the primary?
There are now 5500 miles on the bike.
Thanks for your help.
PatS
The vibration seems to come from both the handle bars and seat, though I noticed
it first in the handle bars. I can't tell where the sound is coming from yet,
but will check this weekend.
When shifting, I can feel it in the rpm ranges from 2300 and up as I shift, so
it is in all gears and not a tire or belt issue. Going downhill at 70 mph
(about 2500 rpm), the vibration and sound stop when the clutch is disengaged.
At 70 mph, the engine still feels normal...I can punch it and get the
acceleration as usual, but there seems to be a drag and the hum is still
present.
Is it possible that the noise and vibration are coming from the transmission
and/or the primary?
There are now 5500 miles on the bike.
Thanks for your help.
PatS
Cruiser
Joined: Aug 2018
Posts: 109
Likes: 12
From: south Texas
It is indeed possible that the source of your issue lies somewhere in the primary or tranny. Since the bike is under warranty , I'd get a service rep to acknowledge the symptom and go from there. A removal of the primary cover may be in order to inspect the tensioner and check torque on the compensator nut as a start. Otherwise I'd recommend checking all of the oil levels as soon as possible.
Trending Topics
Seasoned HDF Member
Joined: Jan 2008
Posts: 13,652
Likes: 11,421
From: State of Confusion
especially if it's consistent/repeatable for them on a test ride..and they have a new one to ride and compare it with..if you left your powertrain warranty intact and they want to break into the engine then that's the way to go obviously
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Thread Starter
|
Stage IV
Joined: Aug 2018
Posts: 4
Likes: 0
From: Binghamton, NY
Thanks for all your input. I changed all of the fluids and levels were pretty accurate. I checked the chains/tensioner and all looked good. Rode it again with the same issues...around 70 mph it still vibrates pretty bad. Pretty sure it's in the drive train.
Bringing it to the dealer tomorrow night. I'm hoping that the muffler upgrade won't give them a problem.
Bringing it to the dealer tomorrow night. I'm hoping that the muffler upgrade won't give them a problem.
Last edited by PatS; Aug 29, 2018 at 11:28 AM.
