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Buell Forum » Knowledge Vault (tech, parts, apparel, & accessories topics) » Troubleshooting (Poor Starting/Running/Handling/Ride Issues) » Archive through April 26, 2010 » Pulsing sound from engine « Previous Next »

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Xb9rnutt
Posted on Saturday, March 20, 2010 - 12:36 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
When I’m driving the engine sounds as if it’s pulsing. That’s the best I can describe it. I don’t notice any power loss any thoughts.
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Blake
Posted on Sunday, March 21, 2010 - 03:39 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
Learn how to better describe the "pulsing"?

Seriously, at what rpm, and at what frequency is the "pulsing" occurring?

The v-twin does produce a nice rythmic thrum.
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Reepicheep
Posted on Monday, March 22, 2010 - 01:00 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
If you have two things making noise at two regular frequencies, you will magically get a "beat frequency" that is the difference of the two.

So if you had a 5000 Hz tone (like a beep) and a 6000 Hz tone (like a beep, but higher pitched), you will *also* get another 1000 Hz tone (which is a fairly low tone).

That can throw people off. I can take two high pitched noises, and make a low pitch noise out of it.
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Mesozoic
Posted on Tuesday, March 30, 2010 - 11:33 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
Everytime I ride my XB into the parkade of my high-rise condo I get a pulsing resonance that threatens to deafen me. It's my helmet reacting to the exhaust!
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