Top End Noise
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Intermediate
Joined: Feb 2011
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From: Washington
Top End Noise
Hey All,
Bought a 1990 FXSTC a few months ago and of course I have a few concerns as I am enjoying the open road.
There is quite a bit of Top End noise, not sure if this is normal, could it be fuel or something else all together?
Also, once the bike is good and warm, and I shut it down it tends to dare I say Cadillac a bit, if you know what I mean. (Does not want to shut down right away.)
Thanks,
Joe
Bought a 1990 FXSTC a few months ago and of course I have a few concerns as I am enjoying the open road.
There is quite a bit of Top End noise, not sure if this is normal, could it be fuel or something else all together?
Also, once the bike is good and warm, and I shut it down it tends to dare I say Cadillac a bit, if you know what I mean. (Does not want to shut down right away.)
Thanks,
Joe
Cruiser
Joined: Apr 2009
Posts: 178
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From: Billings, MT
ive never heard the term "cadillac" before......always been "diesel-ing" in my neck of the woods........after-run might be more technical.
sounds to me like you have the timing set too far advanced. that would account for both the run-on and more top end noise. try retarding it a lil bit and see what you have.
sounds to me like you have the timing set too far advanced. that would account for both the run-on and more top end noise. try retarding it a lil bit and see what you have.
Thread Starter
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Intermediate
Joined: Feb 2011
Posts: 47
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From: Washington
Top End Noise
ive never heard the term "cadillac" before......always been "diesel-ing" in my neck of the woods........after-run might be more technical.
sounds to me like you have the timing set too far advanced. that would account for both the run-on and more top end noise. try retarding it a lil bit and see what you have.
sounds to me like you have the timing set too far advanced. that would account for both the run-on and more top end noise. try retarding it a lil bit and see what you have.
Thanks for the info, I will try the timing and to answer the other question, I do not have any other info on the bike other than what I have found by working on it. I bought the bike from the dealer as is.
It might just be me, it is my first Harley.
Thanks,
Joe
Outstanding HDF Member
Joined: Mar 2010
Posts: 2,877
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From: Hallsville, Tx.
Some after market cams have a more "square" design and can make more top end noise than stock. Also, if the gear lash on the aftermarket gear supplied with a cam is more than stock it can be noisier. I've been told that these are not terrible things just obnoxious. That being said, it being your first Harley, if it were me I'd look for a good Indy in your area and have him give a listen. Do the timing thing as suggested first and see if that helps. enjoy, and ride safe.
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Joined: Dec 2007
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Hey All,
Bought a 1990 FXSTC a few months ago and of course I have a few concerns as I am enjoying the open road.
There is quite a bit of Top End noise, not sure if this is normal, could it be fuel or something else all together?
Also, once the bike is good and warm, and I shut it down it tends to dare I say Cadillac a bit, if you know what I mean. (Does not want to shut down right away.)
Thanks,
Joe
Bought a 1990 FXSTC a few months ago and of course I have a few concerns as I am enjoying the open road.
There is quite a bit of Top End noise, not sure if this is normal, could it be fuel or something else all together?
Also, once the bike is good and warm, and I shut it down it tends to dare I say Cadillac a bit, if you know what I mean. (Does not want to shut down right away.)
Thanks,
Joe
I'd pull the timing back, and/or time the engine.
Scott
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From: Washington
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Road Master
Joined: Aug 2009
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From: new york
The problem could be a build up of cabon in your combustion chambers, the carbon can flake and create hot spots which can become an ignition source for incoming fuel charge on carbureted engines. This was referred to as dieseling or run on, could also happen when the idle is set to high.
(thats old school)
(thats old school)
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Tourer
Joined: Nov 2007
Posts: 334
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Nice Bike!
Welcome to the Evo side Joe!, really nice looking bike you have there! The guys above have given good advice re: timing, carbon, valve train noise, etc. Some bikes are also just noisier than others... How many miles does it have? Aftermarket cam?
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