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General Category => General Discussion => Topic started by: nsmith on June 29, 2023, 02:15:58 PM

Title: 2007 Breva under tank noise
Post by: nsmith on June 29, 2023, 02:15:58 PM
Ok it started with a low hum while coming down from higher RPM. Just a slight hum. Now it starts out the same but last time out, as the bike warmed up, the noise became constant and quite loud. Nephew said sounds like a cooling fan. Has anyone had alternator bearings fail on these. 45k miles and it is a pain taking that tank off and of course there is 9 miles down from a full tank. Just my luck.  To me it started out like air being sucked through like an air box lid that was loose or missing an o-ring gasket.
Title: Re: 2007 Breva under tank noise
Post by: Huzo on June 29, 2023, 02:36:24 PM
Take the belt off and start the bike, if the noise goes away then that was it.
My Norge has never needed alternator bearings (130,000 miles).
Honestly alternator out = 1 hour.