Bike was running real bad...
What has happened:
Bike was serviced three weeks ago, just befor I left for a 4-days tour into the German Black Forest.
From that time, the bike started running real bad:
misfiring at a steady throttle position, popping at decel, sneezing from A/C and stalling at idle...
No loss of power when accelerating though and problems of misfiring disappeared when giving it bit of extra throttle.
As I want the bike run smooth when I go down there again next weekend for the 2012 HDF Euro M&G, I started checking out the forum, Clymer & H-D RM for possible cause(s).
Found lots of options: from contaminated fuel to malfunctioning of cranck position sensor and lots more in between...
Started running carb cleaner in my tank: no results.
Hmm what next?
Talked to my Indy who -like many posts in here- diagnosed possible worn out and leaking intake & carb seals.
Decided to have them replaced yesterday (one of the intake seals was worn out indeed).
Picked up the bike in the late afternoon and rode home, taking a detour to check out the results.
Unfortunately nothing had changed!
Went back to my Indy today and told him nothing had changed.
Asked him if the carb had to be cleaned. "No need to", he said, "did that yesterday". "Let's try an easy fix and change the (four weeks old) plugs".
So he did, I took out the bike for a test ride and problems are gone!
He even didn't charge me for the new plugs!
The moral of this story:
Although you think that new and "just out of the box" spark plugs will function well for a long time, they can leave you within a week!
Black Forest: HERE I COME!
There was no sign of any wear.
Man, if you knew how glad I am we got it fixed!
Clymer RM gives 17 (!) possible causes:
Fouled or improperly gapped spark plugs
Damaged spark plug cables
Incorrect ignition timing
Defective ignition components
An obstructed fuel line or fuel shutoff valve
Obstructed fuel filter
Clogged carburetor jets
Loose battery connection
Wiring or connector damage
Water or other contaminants in fuel
Weak or damaged valve springs
Incorrect camshaft/valve timing
A damaged valve(s)
Dirty electrical connections
Intake manifold or carburetor air leak
A plugged carburetor vent hoe
Plugged fuel tank vent system
Now you tell me where to start LOL
What has happened:
Bike was serviced three weeks ago, just befor I left for a 4-days tour into the German Black Forest.
From that time, the bike started running real bad:
misfiring at a steady throttle position, popping at decel, sneezing from A/C and stalling at idle...
No loss of power when accelerating though and problems of misfiring disappeared when giving it bit of extra throttle.
As I want the bike run smooth when I go down there again next weekend for the 2012 HDF Euro M&G, I started checking out the forum, Clymer & H-D RM for possible cause(s).
Found lots of options: from contaminated fuel to malfunctioning of cranck position sensor and lots more in between...
Started running carb cleaner in my tank: no results.
Hmm what next?
Talked to my Indy who -like many posts in here- diagnosed possible worn out and leaking intake & carb seals.
Decided to have them replaced yesterday (one of the intake seals was worn out indeed).
Picked up the bike in the late afternoon and rode home, taking a detour to check out the results.
Unfortunately nothing had changed!
Went back to my Indy today and told him nothing had changed.
Asked him if the carb had to be cleaned. "No need to", he said, "did that yesterday". "Let's try an easy fix and change the (four weeks old) plugs".
So he did, I took out the bike for a test ride and problems are gone!
He even didn't charge me for the new plugs!
The moral of this story:
Although you think that new and "just out of the box" spark plugs will function well for a long time, they can leave you within a week!
Black Forest: HERE I COME!
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Hence, it's their own personal Indy (God).
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