Rhytmic knocking TC-88, warm engine @ idle
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Road Master
Joined: Aug 2006
Posts: 819
Likes: 6
From: Long Island N.Y.
Rhytmic knocking TC-88, warm engine @ idle
Guys, my 2001 RK is less than a month old to me, got her pre-owned with 18,900 miles. Stage I A/C, SE touring slipons and previous owner has installed PC3 USB.
She runs good, I've only put 20 miles so far since getting her. Here's my concern after riding 10 miles today, There's this loud rhytmic, like tapping/knocking noise on idle. More pronounced on the left side of the engine and possibly coming from rear cylinder. It seems louder than valve noise. Should I be concerned? This is my 6th Harley and I dont remember my other TC-88 bikes having this much noise. I have two videos, one is the warm up from cold start and the other one was taken after my 10 mile ride. The ambient temp here was between 36-42F. Bring back to the dealer?
RK TC-88 at warm up:
http://s36.photobucket.com/albums/e8...psd7a0abef.mp4
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RK TC-88 Warm engine noise:
http://s36.photobucket.com/albums/e8...ps27c725c5.mp4
ETA:
Oh and she's also dripping some oil from the aircleaner, maybe 2-3 drops after the run, clean, clear doesnt seem to mix with fuel.
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She runs good, I've only put 20 miles so far since getting her. Here's my concern after riding 10 miles today, There's this loud rhytmic, like tapping/knocking noise on idle. More pronounced on the left side of the engine and possibly coming from rear cylinder. It seems louder than valve noise. Should I be concerned? This is my 6th Harley and I dont remember my other TC-88 bikes having this much noise. I have two videos, one is the warm up from cold start and the other one was taken after my 10 mile ride. The ambient temp here was between 36-42F. Bring back to the dealer?
RK TC-88 at warm up:
http://s36.photobucket.com/albums/e8...psd7a0abef.mp4
-
RK TC-88 Warm engine noise:
http://s36.photobucket.com/albums/e8...ps27c725c5.mp4
ETA:
Oh and she's also dripping some oil from the aircleaner, maybe 2-3 drops after the run, clean, clear doesnt seem to mix with fuel.
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Last edited by knightenforcer; Jan 29, 2013 at 06:18 PM.
Road Warrior
Joined: Sep 2008
Posts: 1,465
Likes: 16
From: Nor Cal
Sounds like a lifter. Get a stethoscope or some 1/4" I.D. hose and try to pinpoint the sounds origin. One thing I seen in the 2nd video is that your horn is loose. Nice looking bike. look's pretty clean. Did you get a deal?
Last edited by DanDman; Jan 29, 2013 at 06:35 PM.
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Road Master
Joined: Aug 2006
Posts: 819
Likes: 6
From: Long Island N.Y.
Thanks, I'll try that tomorow. It was a great deal, for a price of a sportster, got a roadking 
. Also, They gave me 30 days pre-owned warranty. They already fixed a leaking return line and they've been good so far. It sux coz it's still winter and cold and cant really ride that much. Yeah the horn seems loose and I already replaced the heim joints on the shifter...the old ones were rattling like crazy.
. Also, They gave me 30 days pre-owned warranty. They already fixed a leaking return line and they've been good so far. It sux coz it's still winter and cold and cant really ride that much. Yeah the horn seems loose and I already replaced the heim joints on the shifter...the old ones were rattling like crazy.
Last edited by knightenforcer; Jan 29, 2013 at 06:41 PM.
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Road Master
Joined: Aug 2006
Posts: 819
Likes: 6
From: Long Island N.Y.
Thanks guys. I called the dealership this monrning to describe what was happening and they were kind enough to pick it up. I'll update you guys on what they find. I normally do my own mods and minor wrenching, but since they offered the pre-owned warranty, I'm hoping they do the right thing. 
Thread Starter
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Road Master
Joined: Aug 2006
Posts: 819
Likes: 6
From: Long Island N.Y.
Update: got my baby back this morning. (thanks bellmore harley). Tech said the cold idle and warm idle were corrected & adjusted to specs. Also they fixed the decell pops. Motor mounts are OK. Since it's still winter and very windy here I was only able to test ride it a few times around the block. The noise has diminished, not as pronounced as before. All fluids were checked and ok. They didnt find anything abnormal aside from the idle and decell pops. I'm hoping that's all it is. Hopefully the weather will be better so I can ride a bit more and see if it does it again.
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