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Discussion in 'General' started by John Cingel, Jun 1, 2017.
Just looking do an opinion on this noise. Thanks
Its hard to tell through the video, but maybe a broken lifter or valve?
Agree with above posts but also you may consider:
cannot be certain... (Sometimes cracked valve spring; compression test to find.)
Don't know the 2008 Big Dog primary (have the 2004 "harley" primary on mine)
but yours sounds something like this; but different perhaps because different Big Dog primary setup...
This video enabled me to diagnose the noise and eventually fix it. -- was a loose Compensator Nut. Compensator noise changes slightly when clutch in and go from neutral to gear and back with out reving motor.
Reving motor: in gear, or neutral, or riding does it change the noise?
Also try to stick end of screw driver at suspected area and listen to handle like a
"stethescope" (no bullshit) to further isolate source area of noise.
Rear cylinder exhaust leak? My hearing is about as bad as my sight tho..
What??? No glasses on ya can't hearor see
Hearing is that bad? That is loud, not an exhaust leak.
How's your oil pressure? Do you have a manual gauge on it?
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Agree with Paul, hard to tell from the video. Diagnostics from the audio would be hit or miss.
Try to isolate it, internal/external, top-end/low-end, etc.
Yeah that's horrible.. i'd check ur lifters.. sounds almost like one may have collapsed
Start with the simple things first. A blown or loose compression release, with make a lot of noise too.
Pull the primary cover check the easy stuff clutch hub nut or compensator loose.
Maybe...don't you have a bike on the lift to work on...
Noise isn't there when I first start it up. It starts once warm. Seems to be coming from the very top on the spark plug side. Listened with a screw driver that all sounds smooth. Its more of a ticking or pinging. I don't have a oil pressure gauge but the idle is high enough .
remove the gas cap and check to see if the vent tube down in the hole is still in place or maybe broken off.
been a lot of people chased their tails trying to find a noise and it just be the tank vent tube.
Did you check your compression relief valves? maybe one is coming apart!
Did you ever figure out what the noise was? I have a similar issue with my 08 K9.
its not the lower end...I'm going to go with top end as valve train noise, you may have a bad lifter...
John, I have the exact same noise issue on one of my Dogs. Had the motor rebuilt by S&S and got this issue with the rebuild. S&S has sent me to 3 shops, lifters changed 3 times, same noise. No noise until engine warms up. Pretty frustrating. Let me know if you resolve it. I will do the same.
@John Cingel - start with a simple pushrod adjustment and go from there, but the 'stethoscope' trick is your best bet to isolate the noise - screwdriver works fine or harbor freight has an engine one for under $10
@sixpack - If everything has been done, and the noise continues, check the rocker arm shafts/bushings in the rocker boxes - these sometimes wear out due to heat in both TP Rocker boxes and S&S Rocker boxes and that failure will sound like A ticking as well....