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Jdubxb
Posted on Tuesday, December 04, 2018 - 01:32 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I've heard of the term "rod knock" but I am not sure what it is supposed to sound like. Last week I started noticed a faint ticking noise. This week it became more noticeable. I describe it as a metallic ticking sound. Could it be the sound of valves hitting the piston?
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Shoggin
Posted on Tuesday, December 04, 2018 - 09:56 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Rod Knock is not a "tick", Its a knock. Low, loud, and once per revolution.

Your valves are not hitting the pistons, you'd know if they did because the bike would immediately run very poorly or not at all.

It's not really an internet question, and even a video with a crappy iPhone mic won't really help, but you are welcome to try.

A slight ticking could be normal injector noise, normal valve train noise (for Buell haha), or a flattening cam lobe. Swing by your local V-twin shop with a 6-pack and ask them to listen to it.

You can also use a wooden handled screw driver to your ear as a stethoscope to pin point where the noise is coming from.
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Jdubxb
Posted on Wednesday, December 05, 2018 - 04:11 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Without my helmet and earplugs on, it sounds more like knocking now. I was hoping it would be lifter noise from me not checking the oil level recently, but adding oil didn't help.

Is it worth rebuilding the motor if I tear it down myself and send in the crank assembly? Aside from the knocking noise the motor runs fine, but it's got 146,700 miles on it so other things may start failing as well.
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Blake
Posted on Wednesday, December 05, 2018 - 09:01 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Check the simple stuff? Primary chain loose? Stator loose?
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Shoggin
Posted on Wednesday, December 05, 2018 - 12:24 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

150K miles is impressive!!
It's not just the engine with those miles on it. Time to retire the ol' girl

You can buy a whole low mileage XB for much less than a re-build will cost you to have done. IMO
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Natexlh1000
Posted on Wednesday, December 05, 2018 - 01:40 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The flappy valve in my muffler got loose and it made a scary sound.
It was replaced under warranty.

When your bike is idling, lean on the actuator on top of the muffler with a screwdriver and see if it changes.
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Sagehawk
Posted on Wednesday, December 05, 2018 - 11:08 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Are there pinging issues? Carbon buildup will make a motor noisy. My flhr built a lot of carbon, and upon disassembly there were gold colored spots on piston and matching spots in head. My light came on finally that it was built up carbon hitting built up carbon. Get boroscope to do a visual and also do a compression check. That should reveal whether that is a issue or not.
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Akbuell
Posted on Thursday, December 06, 2018 - 10:11 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Might try taking the oil filter off, cutting it open, and looking at the filter element. If something is coming apart, the evidence will be there as debris.

Hope this helps, Dave
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Ishampadron
Posted on Thursday, December 06, 2018 - 11:27 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Post a video if you can. I had a knocking sound that got progressively worse in the front cyl and then my bottom end blew out just riding around. I'm amazed that you got that kind of mileage though. Upon inspection of my engine it was a rod bearing that took her out. If its the same thing I had i'd retired that engine.

(Message edited by ishampadron on December 06, 2018)
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Jdubxb
Posted on Thursday, December 06, 2018 - 11:47 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Guys, thanks for the recommendations. I've had the stator nut come loose before but it was a long time ago and I can't remember what it sounded like. It wasn't pleasant sounding though, that much I remember. I will check it for sure. I also plan on cutting open the filter. The bike has an APH exhaust so no interactive valve to inspect. There was significant pinging not too long ago, where I couldn't even get past half throttle during a roll on without it pinging. Running Techron and Lucas in several tanks of gas made the pinging go away.

The bike is definitely parked. If the stator nut is tight and the primary chain isn't flopping around, I think I will take my time and remove and tear down the motor, mainly as a learning opportunity, but also to see (as best as I can) if I can get away with just a crank/rod rebuild.
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Steveford
Posted on Friday, December 07, 2018 - 05:10 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

You'll want to throw in new lifters.
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Sagehawk
Posted on Wednesday, December 12, 2018 - 09:34 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

How many miles on the bike?
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Blake
Posted on Thursday, December 13, 2018 - 09:39 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

"it's got 146,700 miles on it..."
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