I can guess. First choice: seeing it's an 03' twin cam 88, timing chain tensioner pad wear on timing chain. Second choice: lifter/bearing wear causing wear on cam face. I'd be looking at cam chain tensioner pad replacement sooner than later. Destroy motor by oil pump sending metal throughout motor! I'm going with new hydraulic plate an hydraulic cam tensioner pad replacement. Kit comes with new 40% volumn oil pump. Expense keeps me from going with gear replacement kit, eliminating pad tensioners! Then I'd measure proper specs an adjust primary chain tensioner!

after 118 years, in mfg motorcycles, you would think the co. would have it all together, instead of having all our money!

Pull the cam chest cover and look at the cam tensioner shoes.

YUP...THEY ALL SOUND LIKE THAT!! mine is a 2005 tc88 b motor. 1550, 95"ssoooooo much valve train noise, it drives me nuts!!going to trade up, as soon as I get my new clutch pack, starter and compensater installed!! ( 2005 15 anniv fatboy 19,000 miles) I'm done!!!!going with the 103-non twin cam!! quite as a mouse, all you hear are the pipes!!

well i just did scramin eagle oil pump kit..still gotta rattle like noise...comes ans gos..almost likeyour in the wrong gear slow down and it lugs...like a fuel knock..any ideas....its mechanical..its down around the oil filter,,,comes and gos

top, just like you hear, tried to move my camera around to get a different prospective of sound, not sure that worked too well.:) get it fixed! just gets worse.

The nylon cam chain tensioners are probably worn out and the values are slapping a bit. Otherwise, it sounds like the normal H-D chatter before a ceremonial rebuild. Nothing that a couple of grand can't cure.

where was the sound predominately at? Near the top of the head or down low in the block. I have a similar sound now and its in the front left of the head

was it cam chain tensioners or bearings?

sounded like your primary chain was just slapping the inside of the cover.. but you were moving the camera so many times it's kind of hard to tell from a video..

well, it was! had a 7 year extended warranty when I got the bike in late 02. funny your comment about how I need to keep eye on it. I am starting to hear that howl again :(

I can tell lot of folks aint no mechanical technician,cam chain tensioner will be the correct answer

that should about right, make sure they flush the fluid good

ahhhhhhhhh the Sound of that...Woooohooooooooooo

Primary tensioner worn out. Do a dial runout test on the crank and drop a gear drive kit from S&S if your runout is less that .005”. I would recommend an S&S 509 set of cams to bump up the torque on your bike, I really like them on my 05. Electra glide TC

Sounds like tensioner and or cam bearing issues

It was cam tensioners yea. I was lucky that I was still under warranty. My 7th year I had extended. I also replaced my cams with a higher lift at the same time so it all worked out pretty good (:

I have a feeling now with having 80 000 km on my bike that it may be coming back, starting to hear the howling when its hot after a long ride.

Cam chains, tensioners....

I Have 93000 k on my bike now. Can start to hear the whirring noise and I faint knock again. We see how next season goose.

I think my 2002 fat boy is solid crank .?

sounds like bad bearings or tensioners

Please don't take this the wrong way but i don't know why people buy aftermarket cases like Delkron ones? Are the stock OEM HD cases junk? I've owned 3 Evo's over the years and never had a case failure.

first thing I would is shut it off.

tensioners and they did bearings too, plus I upgraded cam ;)

Sounds pretty normal to me.

you could get your crank shaft re trued..get your crank pin welded..or get a better helmet so you don't hear it..ear plugs are way cheaper

Tensioners

Tensioner

Please shut her down ...hard.to say but id go cam chain tensioners ..hard to say from video but thats my 2cents....good luck

rocker assy worn put the new kit on idles to low

Compensator nut...

Just sell it and buy an Evo, problem solved...

all normal sound coming from harley tc. next time buy a mule

FATALLY FLAWED DESIGNED TWINKIE, is all. Notorious for crankshaft twisting out of true, at the pinion shaft and "wobbling out of spec, which should be no more than 0.001" or less of shaft run out, as it progressively worsens, due to fact that it doesn't have a crank pin bolt and nut to hold both halves of the crankshaft together, like the single cam Harleys of old had, nothing is holding the two halves together. Nothing, as the flywheel was simply pressed together at the factory. When the shaft wobble hits, -0.003", damage to all the engine bearings, bushings, cam support plate bushings and bearings, cam bearings, all begins, and it progressively will worsen until the engine is cratered. Only solution for that is to tear engine down and take the flywheel to a performance specialty shop and have it taken apart and to re-hone the connecting rods, balance the flywheel components, reassemble it and have it dynamically trued and back to spec, and TIG-weld both halves together for a bullet-proof flywheel. Noise, could also be that the PLASITC silent chain drive tensioners either one or both have broken into pieces inside the engine and now you have METAL TO METAL contact between the tension holder and the METAL silent chain and is producing metal shavings which are being inducted by the oil pump into the crankcase and cylinders and will crater the engine and cause it to seize up and you are out one TC engine. Could be a bad compensator and rotor too that has been wallowed out inside the primary side housing. It's a TWIN CAM and these are junk engines. Harley used to use METAL GEAR DRIVES to operate the single cam engine and oil pump, but, starting in 1999 to the present, they went to silent chain drives with PLASTIC components in critical engine components. The rockers can also get wallowed out and make them elliptical and ruin the bushings. Also the silent chain can stretch and severely affect valve/cam timing, Lots of GREMLINS IN TC ENGINES.