Help with noise/vibration
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1st Gear
Joined: Jun 2010
Posts: 5
Likes: 0
From: Indianapolis, Indiana
Help with noise/vibration
I have a 2007 super glide custom that I bought used and is my first Harley. There has been some engine mods by previous owner.
When it is hot outside and the bike has been run for a while there is a noise with vibration on coasting in any gear. most noticable at 45-50.
I can hear a low howl noise and feel the vibration in the engine, it will go away if clutch is let out to put a load on the drivetrain.
This is not a tire problem, I checked on many surfaces.
Can the belt cause this type of noise or should I be looking at transmission or primary drive?
Otherwise the bike runs great, just annoying when warm, I have gone 2600 miles and it hasn't gotten better or worse.
Thanks for any ideas..
When it is hot outside and the bike has been run for a while there is a noise with vibration on coasting in any gear. most noticable at 45-50.
I can hear a low howl noise and feel the vibration in the engine, it will go away if clutch is let out to put a load on the drivetrain.
This is not a tire problem, I checked on many surfaces.
Can the belt cause this type of noise or should I be looking at transmission or primary drive?
Otherwise the bike runs great, just annoying when warm, I have gone 2600 miles and it hasn't gotten better or worse.
Thanks for any ideas..
Road Master
Joined: May 2007
Posts: 1,168
Likes: 1
From: Cornwall UK
Try the belt tension, you should be able with two fingers and moderate ease turn the belt to 45 degrees measured middle distance between the two pulley,s. Thats unless you have a Harley belt tensioner.
Road Master
Joined: May 2007
Posts: 1,168
Likes: 1
From: Cornwall UK
If the belt is too tight it will put stress on your gearbox....not good.....a little on the loose side is better than over tight......if you are not sure maybe get a second opinion.
Road Master
Joined: May 2007
Posts: 1,168
Likes: 1
From: Cornwall UK
If you do adjust or even if you don,t check that the wheel is correctly aligned. There is a small hole approx 3mm diameter drilled in the swingarm approx 75mm in front of the axle. The distance from the hole to the centre of the axle should be the same either side. Maybe use a bent piece of wire or an allen key as a measure.This will ensure the pulleys are aligned / belt pulling true. Hope this makes sense.
Big Kahuna HDF Member
Joined: Feb 2006
Posts: 23,881
Likes: 34
From: USA
First wash the drive belt and pulley with soap and warm water. Check for deflection in the slot on the belt guard. Too tight or too loose or sometimes dirty will cause noise. Look at the edges of the belt for wear indicating rear wheel misalignment.
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Road Captain
Joined: May 2007
Posts: 596
Likes: 7
From: Illinois
I found that if I adjust my belt to the specs in the manual, it ends up way too tight when it warms up. I also found that the alignment holes on my swingarm are off a little. If adjusted to those holes, my bike dog tracks and belt wears on the left side, and makes noise.
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May 15, 2007 09:24 AM
