Wildguzzi.com
General Category => General Discussion => Topic started by: Colin Cheney on May 21, 2019, 03:28:15 PM
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Hello Everyone,
I am new to the group and new to Moto Guzzi motorcycles. I have some technical experience with BMW and Norton motorcycles. When I purchased my Classic it vibrated excessively at the handlebars 55 mph or around 3,500 in top gear. Having read posts on this and other forums I noted that the vibration may be linked to the crash bars, which were Hepco and Becker and fitted to the machine when I bought it. I removed the bars and the front, upper mounting bar on Saturday evening and rode the machine last night; it was much improved and the vibration had gone from the handlebars [wide, touring type bars] but was now more noticeable at the footrests at 4,000 rpm. Would this be linked to the centre stand [also already fitted on purchase]? Could the engine mounting bolts be tightened up or loosened off a little to move the vibration? I seldom ride faster than 65 mph so I could live with vibration at, say, 6,000 rpm or above.
All replies much appreciated,
Colin Cheney, Leicestershire, England.
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I'm having a hard time imagining the crash bars (or centerstand) have anything to do with vibration.. have you sync'd the throttle bodies or is that a model with single TB?
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I'm having a hard time imagining the crash bars (or centerstand) have anything to do with vibration.. have you sync'd the throttle bodies or is that a model with single TB?
It is a single TB.
I know my 2015 benefited greatly from the Beetle map which smoothed out things considerably, but I wouldn't have called the engine vibes excessive beforehand.
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And Colin, welcome to the forum! Please take a minute to further introduce yourself to the mob here.
I am sure someone on the forum will help you get to the bottom of your vibration issue in short order.
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My thought is you are lugging it. The little small blocks like to run between 4,000 and 5,500 rpm. I never cruise below 4,000 rpm, unless I'm going under 35 mph through town. I often run 60 to 65 mph in 4th gear just to keep it smoother. I save 5th for interstates and high speeds.
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I have an '09 V7 and it has heavy bar ends. Does yours?
I found that cutting the throttle spring on the right handgrip really helped my sensation of vibration. Less fatigue and all.
Let me know what you find.
Joe
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It is a good exercise to check all bolts you can access on the bike to make sure they are tight. That is the first place I would start. Many vibes have been traced to loose bolts on the V7.
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I concur that it's not a bad idea to check bolts as good measure.
That said 55 mph is only 3500 in 5th gear and a bit of lugging is a real possibility.
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I have heard certain crash bars act like a tuning fork. I've reached down and grabbed mine and the vibes were hellacious at certain RPM's. BTW, your '14 is either a Special or a Stone. Classics were earlier models- '09-'12?
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I have heard certain crash bars act like a tuning fork. I've reached down and grabbed mine and the vibes were hellacious at certain RPM's. BTW, your '14 is either a Special or a Stone. Classics were earlier models- '09-'12?
Agreed. I chased a mystery vibration, couldn't really tell where it came from, and finally took the engine out. Balanced the entire rotating assembly. It was the crash bars.. :embarrassed: One was tweaked from a fall, apparently.