Help with engine noise under load
Road Warrior
Joined: May 2012
Posts: 1,570
Likes: 117
From: Southeast NC
mine does exact same thing. mostly after i am off throttle going down a long hill then when i start to get on it i hear the exact same noise. if i really get on the throttle it will go away after a few seconds. im stumped. bike runs perfect though. its just that noise under these circumstances. hope u figure it out. ive heard other guys describe this on this forum. dont sound like detonation to me. detonation sounds like pinging to me.
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Road Captain
Joined: Feb 2009
Posts: 671
Likes: 5
From: D.C suburbs
mine does exact same thing. mostly after i am off throttle going down a long hill then when i start to get on it i hear the exact same noise. if i really get on the throttle it will go away after a few seconds. im stumped. bike runs perfect though. its just that noise under these circumstances. hope u figure it out. ive heard other guys describe this on this forum. dont sound like detonation to me. detonation sounds like pinging to me.
Elite HDF Member
Joined: Nov 2010
Posts: 3,846
Likes: 173
From: Simi Valley, CA
If the noise is throttle and load sensitive, my money says you're hearing pinging and the only way you're going to get rid of it is - higher octane fuel, lower operating temperature, or retard the ignition timing a bit. You really don't have much control over the first two so you're left with the timing adjustment.
I've had to take out as much as 4 degrees of timing to eliminate the pinging in my bike (2011 Ultra Limited w/103). It pinged from the day it was new until I adjusted the timing.
I've had to take out as much as 4 degrees of timing to eliminate the pinging in my bike (2011 Ultra Limited w/103). It pinged from the day it was new until I adjusted the timing.
Cruiser
Joined: Jun 2010
Posts: 153
Likes: 1
From: central Fl.
Change to a different gas station, make sure there is no ethanol in their fuel. Maybe a bit of octane booster in the next tank if a different gas station doesn't help. If it is a detonation related noise it should change the sound. Is the compression in the two cylinders even within spec?
JJ
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