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Experiencing a "chattering" type noise when RPM are over 2500 and engine is warm. Sounds exactly like loose chrome add ons but took everything off including heat shields and the noise is still there. 2001 Road King 34,000 miles. 95 inch factory installed kit. 203 cams. SE 203 cams, SE lifters, SE adjustable push rods, flat top pistons, recent Baisley spring.

Have had the noise for 3 years. 3 Harley dealerships can't find it. Compensator nut retourqued, nothing under the rocker box covers touching, and the sound seems to eminate from the left front of the front cylinder (mechanics stethoscope).

Have religiously changed engine oil every 1000 miles and primary and tranny fluid every 2500. Harley oil for the motor and synthetic for the other two.

Now seems to be developing a "knock"

Other than than, it runs fine.

Any Ideas on the chatter?
 

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Does this noise happen when riding along at a steady rpm, or does it happen when you are at a steady rpm(2000-3000) then applying throttle? (Pre-ignition or detonation?) Will it do it when sitting still, holding a steady rpm, then applying throttle quickly? (Have you checked the head gasket area, and exhaust gasket in the front cyl.?) It there a time when it won't do it? Is it the same kind of noise but worse on lower octane gas? How about when the outside air temp is cold, warm, hot? What does each cylinder spark plug look like? Also, check front motor mount(or engine bolts at front and rear), and top motor stablizer rod assy. Put some tape on the down tubes near the exhaust pipe, and see if you are somehow hitting the frame when juicing the engine. Check if fuel tank is loose, and for lose cables running through the tunnel. Just a few things you can check while riding.

Thorns
 
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