Harley Davidson Forums - Twin Cam Motors

Poor boy tuning

xcbullet — Tue, 19 May 2026 11:14:56 GMT

Any help where to adjust on my PC3 would be great . 31mpg, 95 big bore MM

Stator Wire Grommet

spyd3rm4n — Tue, 19 May 2026 04:27:11 GMT

I've had an oil leak from my TC88 stator grommet for a while until I unplugged the connector and slipped an o-ring over the outside of it, wedged between the case and the grommet to pull it out a bit which stopped most of the leak. It's a bit damp around the grommet but not dripping down under the crankcase any more.

I have my primary off for another repair and I'm wondering if there's a way to fix this leaky stator wire grommet short of buying a new stator. Is the grommet available as a separate part?

Inner cam bearings

spyd3rm4n — Mon, 04 May 2026 17:37:25 GMT

I have a 2006 Street Glide, TC88, bought it used around two years ago with unknown exact mileage and relatively unknown history. I wasn't sure if the cam chain tensioners were ever upgraded, but after an oil change I cut the filter open and found no plastic bits so I assumed all was OK for now, with the plan of eventually removing the cam cover and inspecting them.

I'd been riding it nearly every day without issue until a few weeks ago when I had the oil pressure light flickering while stopped at idle when I was pulling into the lot at work. Parked at work, bike cooled off, left to go home and started up just fine no oil light flickering. Then a minute later at a red light it just stalled and wouldn't restart. I pushed it to the side of the road, scanned for codes and got a crank sensor error so I had it towed home.

Upon inspection I found my crank sensor physically damaged:

I drained the oil and didn't find any metallic glitter or other bits of metal, though the magnetic drain plug had some metallic 'goo' stuck to it, wiped it off and it didn't have any big chunks or grit, just powder-like metal. I pulled the plug under the crankcase and a banged up needle bearing roller dropped out:

So now I'm pulling the cams to inspect the inner cam bearings and assess the damage. I'm aware of the bearing failure on these engines, looks like yet another victim. So far I just got the cam cover off:

There was no metal in the cam chest area, and the oil that drained out of there was also clean. I was surprised to learn that my tensioner shoes were already replaced at some point so that's a good sign that there was at least some care by the previous owner, they're in good shape too with virtually no wear. However given that I have this apart I'll likely upgrade to the SE cam plate with hydraulic tensioners, but that depends on what else I find. Still need to remove rockers and pushrods to remove the cams, I have no interest in adjustable pushrods and want to inspect my breathers anyway.

I know I may end up having to split the cases to clean up any debris... but just wondering if anyone has ever tried flushing the crankcase with diesel/kerosene and fishing with a magnet. Like I said I didn't have any noise or anything when the crank sensor failed from that roller hitting it. Usually when the cam bearings completely get destroyed they make noises. Oil pan is coming off for cleaning or replacement too, which isn't a fun job on this bike.

Resetting the head in the proper position after removal

Biker4life#1 — Tue, 28 Apr 2026 04:25:44 GMT

can I loosen a head on a 99 twin cam to seal up the intake leak on a Magneti Marelli efi after having work done and I'm coming to realize that I don't think they got the head set in the proper position after countless attempts with different flanges, seals, multiple times from S&S to James etc....I'm getting desperate here, I've been working on this with any spare time, loosing sleep and my sanity here!@? It seems to line up fine with the rear cylinder but cannot for the life of me get this thing quite centered and squared up with the front cylinder mainly (the one that just been worked on) and I've never had a problem at all with that Magneti marelli believe it or not, until now after it was removed for my bent valve, cam bearing, cam repair. Any advice would help and no I'm not taking back to the shop it's to far and I have other issues with their services unfortunately

Nightmare TC88 Ticking Part 2

TC88100th — Mon, 27 Apr 2026 19:02:16 GMT

Hi all, back with an update.

Since the last post, I went back to the bike today once fully cold. Oil level is correct, filter refitted, seal looks perfect, mating surface clean.

Bike started up and idled absolutely fine. No drama at idle. However, the moment I gave it a few revs, oil started coming out from the oil filter area again. Same place as before. I shut it down straight away.

So this now rules out it just being overfilled oil causing the issue, something else is clearly pressurising the system and forcing oil out at what looks like the weakest point?

Bike is:

2003 Dyna
Twin Cam 88
Cam chain tensioners were replaced around 500 miles ago
New filter fitted, no double gasket situation
Oil light initially came on when this first started, hasn’t stayed on since

Symptoms currently:

Oil being forced out of the oil filter when revved
Ticking noise from the front cylinder
Possible high‑pitched whine (hard to capture on video)
Runs and rides but clearly something isn’t right

At this point I’m reluctant to keep starting it until I know what I’m chasing.
Has anyone seen this on a TC88 before? Relief valve stuck? Oil pump issue? Something damaged internally when it initially over‑pressurised?

Any help massively appreciated as I’m trying not to make this worse by guessing.

Cheers 🍻

Pics to follow

Nightmare TC88 ticking

TC88100th — Sat, 25 Apr 2026 21:49:12 GMT

Hi folks,

had a right mare the other day.

I changed oil fine, went for a ride, came back, saw it was half way up the line, stupidly put more (cold) oil in and overfilled it, oil came spurting out the oil filter on next ride followed by the red oil light. I was only a mile away from home so rode it gently home and drained the oil and started again..

rides fine now however now there seems to be a ticking on the front cylinder and seemingly a high pitched whine I could hear as well but doesn�t show up too well on the video.. any ideas? Thinking maybe lifter replacements needed

Attached Files

IMG_9636.mov (15.89 MB)

Metallic motor sound?

Mjkohl112 — Sat, 25 Apr 2026 00:43:46 GMT

2010 dyna wide glide

cannot tell if this sound is normal or not? Stock 96ci, v&h short shots and arlen ness hf air filter

anybody able to help me out? Seems to be coming from engine area but not very sure

not sure if the video will load up here, let me know if not there, im new here