Ducati Sporting Club UK > Model Specific - Discussion, Technical Problems and Help > Sport Touring: ST4 / ST3 / ST2 > ST4S vibration

[tebby]

Recently took delivery of an ST4S after 7 years with one
of the first ST2's to come into the country (australia),
The bike has a vibration which comes back through the bars which is especially bad at 2700-3500 rpm in 2nd & 3rd gears.
more pronounced on deceleration.
sounds & feels like a bearing, anyone have a similar issue??
In general there seems to be a high frequency "buzz" throughout the whole rev range.
bike was poorly pre delivered (not at all)
& came back from its 1000k service with a tight chain which I rode for about 200k's before investigating.
their apperars no damage to chain or sprokets/bearings.
cheers
tebby

[Derek]

Mine had similar problems until I loosened the chain. A buzz at around 30-35mph with vibration through the bars and a howl at around 60-65mph (twice the frequency?). I thought a rear wheel bearing, or worse the gearbox output shaft bearing, was at fault. Make sure that there is at least an inch and a half movement of the chain. This is more than the manual says but it seems to need it. I know of another ST4s owner who has also experienced this.

[Rushjob]

Yep... same here.

[Glyn]

a bad front wheel balance can have an amazingly bad effect on the bike an all

[ST4S]

Same here with the chain tension. It can be quite difficult to allow the chain to run as slack as the ST requires, it's so tempting to tighten it, but they definitely need to be loose.

[tebby]

Thanks for the replies guys,
Just got back from a short trip to read the feedback,& feel slightly better to know others have had the same problem.
I just fitted a Scott oiler as well to give the drive train as easy a time as possible.
I'll slacken the chain a litle more & report back.
This week in & around Melbourne is forecast to be good riding weather so I'll put some K's on & see what happens.
Stay tuned.

[YMFB]

Originally posted by tebby
Thanks for the replies guys,
Just got back from a short trip to read the feedback,& feel slightly better to know others have had the same problem.
I just fitted a Scott oiler as well to give the drive train as easy a time as possible.
I'll slacken the chain a litle more & report back.
This week in & around Melbourne is forecast to be good riding weather so I'll put some K's on & see what happens.
Stay tuned.

any chance of some photos of the scottoiler after its been fitted ?

How long did it take you to fit it and which model did you fit.

Cheers

[tebby]

fitted the universal mark7
took about one & a half hours,
will take some shots & post tomorrow,
pretty straight forward.
cheers
tebby

[YMFB]

cheers that would be great

[tebby]

Originally posted by YMFB
cheers that would be great

Steve,

I noticed a post with pictures which started 8/4/04,This is pretty much as i did. Rushjob is the username of the bloke who posted the pics,
I'll do a couple anyway especially of the vac; takeoff,
hope this helps in the meantime,
cheers
tebby