Ducati Sporting Club UK > Model Specific - Discussion, Technical Problems and Help > 998 / 996 / 916 / 748 > Eccentric adjuster 180 degree out?

[Totto]

I tried to send you a pic of th excentric but the site would not show your email addy , U2 me it and i will email the pic if it would help any ?

[MARTIN H]

Thanks Totto, I already have pics of the eccentric via Haynes manual and something Shazaam posted.

Felix, youre right that the bellypan is the corse one and is a good bit longer than standard. However its probably a good half inch nearer the rear wheel than the identical pan on Lilys bike.

I will see if I can get some pics up showing the exhaust where its been rubbing.

[MARTIN H]

You can see the shiny bit at the horizontal section of the pipe highest up the bike. If that makes sense?

[MARTIN H]

A pic of just how close the bellypan was to wheel.

[JPM]

Martin,

You mentioned you'd had the fork seals done a while ago, did they also set the bike up? maybe they've set this up and it's ended up like this???

[yeti]

Corse swinging arm is around 25mm longer than standard, so it follows that with Corse bodywork everything is gonna be that bit tighter.

Could be if you remove chain by fully slackening and sliding it off both sprockets that you can get the eccentric in the fight position and start again so to speak.

[MARTIN H]

I can get the eccentric in the right position but not with the chain on the sprocket. Am just about to ring for a new longer chain I fancied a nice gold one anyway! Honestly though I have tried and tried to get some sense out of it and cant. Its almost as if my chain has shrunk! Maybe fitting a 180 rear has made the problem more noticible than when I got the bike with a half worn 190 on.

JPM, when I had the fork seals done as far as I know he did nowt else to the bike. I've never been 100% happy with the way the bike felt handling wise since I got it. I never seemed confident in it the way I was with my 996s a few years back. It feels as if the front could wash out when tipping in to bends. Could be down to the rear height being too high as the eccentric is very low down in its chain tensioned position.

There are only 2 positions the eccentric can be in to have the chain at correct tension. One is horribly wrong as it causes the chain to be hard against the lower swinging arm and also the wheel to rub on the hugger. And the other is the right one. When in the correct position the action of tensioning the chain actually decreases ride height as the eccentric is going anticlockwise from the 5 oclock ish position.

I cannot see any other way but fitting a longer chain. I'm hoping an extra 2 links will be enough? Suppose it makes sense that 2 extra links will lengthen the wheelbase by the amount of 1 link of chain. Wondered about 4 extra but that might mean that after the chain has stretched a little there would not be enough movement left in the adjuster to take up tension? Then I would have to fit a bigger rear sprocket to compensate. Which might not be a bad idea!

[Lily]

Martin

Have you sorted out the sag at the front yet?

[Gizmo]

Originally Posted by MARTIN H

I can get the eccentric in the right position but not with the chain on the sprocket. Am just about to ring for a new longer chain I fancied a nice gold one anyway! Honestly though I have tried and tried to get some sense out of it and cant. Its almost as if my chain has shrunk! Maybe fitting a 180 rear has made the problem more noticible than when I got the bike with a half worn 190 on.

JPM, when I had the fork seals done as far as I know he did nowt else to the bike. I've never been 100% happy with the way the bike felt handling wise since I got it. I never seemed confident in it the way I was with my 996s a few years back. It feels as if the front could wash out when tipping in to bends. Could be down to the rear height being too high as the eccentric is very low down in its chain tensioned position.

There are only 2 positions the eccentric can be in to have the chain at correct tension. One is horribly wrong as it causes the chain to be hard against the lower swinging arm and also the wheel to rub on the hugger. And the other is the right one. When in the correct position the action of tensioning the chain actually decreases ride height as the eccentric is going anticlockwise from the 5 oclock ish position.

I cannot see any other way but fitting a longer chain. I'm hoping an extra 2 links will be enough? Suppose it makes sense that 2 extra links will lengthen the wheelbase by the amount of 1 link of chain. Wondered about 4 extra but that might mean that after the chain has stretched a little there would not be enough movement left in the adjuster to take up tension? Then I would have to fit a bigger rear sprocket to compensate. Which might not be a bad idea!

A 180/55 is about 10mm taller than a 190/50 Martin.