Shaking it's head!

pibbow · 07-Sep-2005, 19:45

HELP!!! as some of you will no I don't get out much, so you can only imagine how uterly pi??d off I was last thursday. I was gien a day pass and headed to the mainland for a blast 20 mlies in I sat up slightly at around 50mph to wiggle some blood back into my hands as I did the bike started to shake its head. I tried it again at 60 and all was well until the speed dropped to around 55 then it did it again so rather than just grab the bars I just hovered with my hands just above. The shake got worse then fell away below 50. Now I know what your going to say "why take your hands off the bars at speed" Well I don't make a habit of it but I have never had this before. Anyone have an idea of the cause.

[Edited on 7-9-2005 by pibbow]

sparkin · 07-Sep-2005, 19:52

Might be obvious,but have you checked your tyre pressures?

pibbow · 07-Sep-2005, 19:53

Yes mate first thing I did they were spot on

Rob B · 07-Sep-2005, 19:56

Tyre wear? On one of my bikes if my fronts wear E.g. the tread gets uneven across the leading/trailing edge of the cuts, it'll do exactly what you describe.

Rgds, Rob

sparkin · 07-Sep-2005, 19:58

Ok,bent wheel?poorly seated tyre?

Dave G · 07-Sep-2005, 20:01

Check if the tyre balance weights might have come off too.

pibbow · 07-Sep-2005, 20:02

Well The tyre has done about 2000 miles but it has not shark's toothed yet but I will have another look tomorrow. I have the bike up on paddock stands and have spunn the weel and both it and the tyre seem spot on?

pibbow · 07-Sep-2005, 20:04

Thank's dave there are some on but I will have a close look to see if any have gone astray.

ericthered40 · 07-Sep-2005, 20:13

Quote:

Originally posted by pibbow
HELP!!! as some of you will no I don't get out much, so you can only imagine how uterly pi??d off I was last thursday. I was gien a day pass and headed to the mainland for a blast 20 mlies in I sat up slightly at around 50mph to wiggle some blood back into my hands as I did the bike started to shake its head. I tried it again at 60 and all was well until the speed dropped to around 55 then it did it again so rather than just grab the bars I just hovered with my hands just above. The shake got worse then fell away below 50. Now I know what your going to say "why take your hands off the bars at speed" Well I don't make a habit of it but I have never had this before. Anyone have an idea of the cause.

[Edited on 7-9-2005 by pibbow]

Could it be Tire, wear or balancing, head race bearings or brake calliper sticking. look at the wheel bearings to?

[Edited on 7-9-2005 by ericthered40]

phil_h · 07-Sep-2005, 22:32

It sounds like the steering head bearings are starting to wear.
Too many wheelies mate

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07-Sep-2005, 19:52	#2
sparkin Registered Forum User Big Twin Posts: 1,734 Join Date: Jun 2003 Mood: This is a carbon free zone! Might be obvious,but have you checked your tyre pressures? Reply

07-Sep-2005, 19:53	#3
pibbow Registered Forum User Mille Posts: 378 Join Date: Jun 2005 Location: Scotland Mood: Very sad Yes mate first thing I did they were spot on Reply

07-Sep-2005, 19:56	#4
Rob B Registered Forum User Ducati Meccanica Posts: 2,263 Join Date: Aug 2003 Location: Wimbourne, Dorset Mood: I'm so happyyyyyyyyyyyy Tyre wear? On one of my bikes if my fronts wear E.g. the tread gets uneven across the leading/trailing edge of the cuts, it'll do exactly what you describe. Rgds, Rob Reply

07-Sep-2005, 19:58	#5
sparkin Registered Forum User Big Twin Posts: 1,734 Join Date: Jun 2003 Mood: This is a carbon free zone! Ok,bent wheel?poorly seated tyre? Reply

07-Sep-2005, 20:01	#6
Dave G Registered Forum User 500SD Posts: 531 Join Date: Aug 2001 Location: West Kilbride Ayrshire Mood: I can live with backpain! Check if the tyre balance weights might have come off too. Reply

07-Sep-2005, 20:02	#7
pibbow Registered Forum User Mille Posts: 378 Join Date: Jun 2005 Location: Scotland Mood: Very sad Well The tyre has done about 2000 miles but it has not shark's toothed yet but I will have another look tomorrow. I have the bike up on paddock stands and have spunn the weel and both it and the tyre seem spot on? Reply

07-Sep-2005, 20:04	#8
pibbow Registered Forum User Mille Posts: 378 Join Date: Jun 2005 Location: Scotland Mood: Very sad Thank's dave there are some on but I will have a close look to see if any have gone astray. Reply

07-Sep-2005, 22:32	#10
phil_h Registered Forum User Ducati Meccanica Posts: 2,527 Join Date: Sep 2004 Location: Pulborough, W. Sussex Mood: 900,900,851,750,750,750, 600,600,450,350,350,250 It sounds like the steering head bearings are starting to wear. Too many wheelies mate Reply