Author Topic: Guzzi's and Wobble/Headshake/Slapper  (Read 10192 times)

Offline balvenie

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Re: Guzzi's and Wobble/Headshake/Slapper
« Reply #30 on: August 26, 2017, 10:22:58 PM »
     I had a serious tank slapper with my 96 Sport right after I bought it. It was my 3rd Guzzi and I knew that shouldn't have happened. I entered a nice high speed sweeper at maybe 80mph but hit a series of three minor bumps in the road and that set it off. The bike recovered after I rolled off the throttle. The previous owner of the bike was 40 pounds heavier than me and had the rear spring preload too tight for my weight. I backed it off and never had that problem again, in spite of riding way too fast for public roads. I don't ride that fast anymore. I still enjoy a spirited ride, but not stupid fast.

Makes me wonder if I am not too light for my Cali. Stiffening the damping of the stock shocks was not much good. When they "died", the replacements had to be set on a hard ride to ease the front-end wobbles in bumpy bends (at speed :evil: :wink:) Wasn't a cure. Only new fork springs worked. FWIW, my weight is about 160 pounds and I sit as upright as possible, although now that I think about it, that probably does not apply when cornering fast. Others might want to set me right on that. I am really not sure what posture I assume in bends.
Oz
04 Cali
As ye practice, so do ye teach.

Offline Murray

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Re: Guzzi's and Wobble/Headshake/Slapper
« Reply #31 on: August 27, 2017, 01:55:10 AM »
Correct setup on the sports at least and you won't need the damper the geometry is pretty conservative, you will get a slight weave at speed during a rev match down change (say you've dropped to 5000rpm in fifth and want to get it back on the boil in fourth which usually means a redline blip) although this is more to do with the orientation of the crank. Unless you've got an issue with head stem bearings or something similar.

 

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