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OK so when I had my 1100s the front suspension unit (spring and damper) was found to have up and down movement at the top moiunting even though the mounting nut was done up tight. The rubber mounting had hardedned up. Cure: Inseret a rubber washer (home made from an old inner tube) bewteen the top of the unit and the mounting then do up the retaining nut again. Take care when removing the adjuster Knob as it contains a captive spring loaded ball bearing which gives you the positive stop clicking when adjusting the damping.

Cannot remember how I checked this whether the weight was off the front end and no wheel fitted maybe. Or just jack up the front under the sump and then get someone to let the front down slowly while you feel for movement at the mounting point.

If you cannot find play anywhere else it might be here.

jeznewsome wrote:Gerry, the front was rebuilt in 2013, by Firefox in Keighley. So I would hope that hasn't gone already.

Thanks Jez , its a weird one .

Some times it feels like the front, some times the back .

I will in a few weeks make space in my workshop ( I hope ) so I can get onto it .

The front will be the first I want to check , purely to satisfy myself , then I'll check the back .

Just a weird one , I've never experienced before .

Jez , I went out yesterday , did a hundred miles , no problems at all.

Saturday , went to work down the road on the bike , and it did the knocking sound and almost felt like the front end was solid , no suspension , twice ...

Needs further investigation .

try touching the brakes slightly ,,, if its pads th rattle will stop , my 11 did it , i got used to it and never worried.

Paralever bearings?

I haven't had a chance to do any investigating yet .

Trouble with doing two jobs ...

GerryB wrote:I have scanned loads of Tech threads , but not found what I'm looking for .

My R1100S some times makes a knock sound that I can feel through the bars , when riding slowly over uneven surdace , small holes etc in the tarmac.

I've never noticed it at higher speeds .

I think its on the front, but not absolutley sure .

I've jacked the front up , checked wheel bearings etc , shaken and cant feel any play in the suspension on the front .

I can't find any thing loose at the rear either ..

Ideas please

Over prolonged use on poorly surfaced roads the bottom ball joint threaded section tends to wear through the actual metal wishbone.
Firstly try doing the nut up (needs an allen key and ring spanner from memory). Also check for wear in the actual ball joint, if tightening the nut on threaded section doesn't cure the problem.

bigblackfalco wrote:

GerryB wrote:I have scanned loads of Tech threads , but not found what I'm looking for .

My R1100S some times makes a knock sound that I can feel through the bars , when riding slowly over uneven surdace , small holes etc in the tarmac.

I've never noticed it at higher speeds .

I think its on the front, but not absolutley sure .

I've jacked the front up , checked wheel bearings etc , shaken and cant feel any play in the suspension on the front .

I can't find any thing loose at the rear either ..

Ideas please

Over prolonged use on poorly surfaced roads the bottom ball joint threaded section tends to wear through the actual metal wishbone.
Firstly try doing the nut up (needs an allen key and ring spanner from memory). Also check for wear in the actual ball joint, if tightening the nut on threaded section doesn't cure the problem.

Thanks , I will check this .