Thumper Club Forum

Technical => Bike Problems/Questions => Topic started by: guest1703 on November 15, 2013, 03:40:26 PM

Title: XBR500: High pitch noise at 80km/h
Post by: guest1703 on November 15, 2013, 03:40:26 PM: Hi all
Hope someone can help me with this. When I reach 80 km/h on my XBR500, most times it is resulting in a high pitch noise, sounds like a electronic noise and not parts touching each other. It stops when I slow down to 30 km/h. It sounds like it is coming from the front part of the bike...

Anyone having an idea what this could be?

Thanks a lot
Dennis
Title: Re: XBR500: High pitch noise at 80km/h
Post by: guest1405 on November 18, 2013, 03:15:12 PM: I had this problem some years ago with one of my XBR's and although the memory is't so good I seem to recall it turned out to be an air leak on the carb inlet. Worth looking into anyway.
Title: Re: XBR500: High pitch noise at 80km/h
Post by: guest1247 on November 18, 2013, 11:50:37 PM: Hi Dennisnn, Ref the noise from the front area of your bike. Just a thought, when the noise is apparent, have you tried operating the front brake..albeit slightly..? I have come across front pads that seem to cause a certain noise / resonance at certain speeds, and the "buzzing" that emenated from the caliper was certainly hard to pin-point. Let us know how you get on. Regards... Tony
Title: Re: XBR500: High pitch noise at 80km/h
Post by: blew on November 19, 2013, 09:19:48 AM: Tight chain???;
Title: Re: XBR500: High pitch noise at 80km/h
Post by: guest1703 on November 23, 2013, 07:11:46 PM: Quote from: Oldveloman on November 18, 2013, 03:15:12 PM
I had this problem some years ago with one of my XBR's and although the memory is't so good I seem to recall it turned out to be an air leak on the carb inlet. Worth looking into anyway.

"Unfortunately" it does not seem to have a leak :/
Title: Re: XBR500: High pitch noise at 80km/h
Post by: guest1703 on November 23, 2013, 07:12:44 PM: Quote from: Calleyne on November 18, 2013, 11:50:37 PM
Hi Dennisnn, Ref the noise from the front area of your bike. Just a thought, when the noise is apparent, have you tried operating the front brake..albeit slightly..? I have come across front pads that seem to cause a certain noise / resonance at certain speeds, and the "buzzing" that emenated from the caliper was certainly hard to pin-point. Let us know how you get on. Regards... Tony

I have tried this, but still does not seem to help the problem...
Title: Re: XBR500: High pitch noise at 80km/h
Post by: guest1703 on November 23, 2013, 07:13:15 PM: Quote from: blew on November 19, 2013, 09:19:48 AM
Tight chain???;

Chain is perfectly adjusted
Title: Re: XBR500: High pitch noise at 80km/h
Post by: SteveC#222 on November 23, 2013, 07:28:18 PM: My XBR developed a high pitched buzz/rattle once and it turned out to be the tax disc holder ( mounted on one of the headlamp bolts) that was just vibrating against the fork stanchion at a certain speed - there was a tiny gap between them, but not enough to stop it buzzing and the XBR does have a vibration patch at around 50mph(80kph). Just a thought.