I’m a Premium member and just came back from a long ride of 1400 miles. Nearing the end of the ride I started hearing primary noise rattling from my 2010 HD Road King. The next day after arriving home I drained the fluid and found not only the metal paste on the magnetic drain plug but several metal shards about 1/2 to 3/4 inch long. I commenced changing the oil but have not ridden it since. I have another ride to the Adirondacks in two weeks so need to get it checked. A new starter clutch & clutch assembly, primary seals, bearings and gaskets were installed last year and I’ve ridden about 12,000 miles on that. No other problems or noises and I’ve always run Amsoil 20W/50. I have 60,000 mile on her. What are some likely things to look for?
Top breathing engines breath, or vent, through the top breather bol
Dan, being that someone has already been inside your drive compartment, it could be a few things. The metal paste is normal wear. Usually from the charging system. Once you pull your outer primary cover, it will probably be obvious. If you did not notice any performance problems on your last ride, it could be as simple as a bolt that has come loose. Let’s hope it’s something silly like that. Please give us an update.
Update: As an update to the “Primary Noise” posts; I was told that a failing compensator damaged the rotor, clutch and starter clutch and all had to be replaced along with the associated gaskets and fresh fluid. I can attest that in riding the bike the 35 miles home the difference in sound and, seemingly, performance are remarkable. Strong, crisp and responsive… just how I remembered her :). Now I’ll be confident as I head to the Adirondacks for some mountain R&R. Dan S
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If this okay, just add a little Technical info to this query, unfortunately this may be a little more sinister than it appears. Here’s for why, I don’t now if you know that the ‘Twin Cam’ motor has an inerrant manufacturing problem with crankshaft run out.The in depth technical reasons I won’t further here.
I have seen on several motors the outcome of this as described, with shards of material being removed from the inner primary cover behind the clutch. This is due to crankshaft run out causing the clutch to oscillate with the described outcome. This also causes primary chain wear the outcome being the rollers break up. There’s always one doom and gloom merchant is’ent there !!!!!!!!
I had cause to remove my Primary cover on my 07 Softail, during this I put a DTI on the crank and measured the run out, I have 4 thou, now to me as a retired Mechanical Engineer, and an engine builder, that’s way out of tolerance, and scrap, I’m going S&S but that’s another story. Now you know why Harley does not gear drive there cams?????? But that’s maybe for another time……..
If it’s okay I would suggest that when the Primary cover is removed on this motor that the crankshaft run out is checked, just in case. Hopefully this motor as not got the above problem.
Thank you for the great feedback. Yes, when we did the cam chain tensioner videos we show the measurement and why many will not be able to go to S&S gear drive.
Harley Compensator Upgrade
Rear Belt Removal
Cam Chain Tensioner Class