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Ynot
Joined: 30 Sep 2011 Posts: 3 Location: New Zealand
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Posted: Fri Sep 30, 2011 11:26 am Post subject: Steering head bearing adjustment |
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Hi everyone. I have just joined up to the forum. I have a YB11. Had it for about 6 months. I'm keen to get some mechanical information if I can, as there are no dealers here in NZ that can help. Specifically I'm trying to find out how to adjust the steering head bearings. The handbook says "tighten the adjuster cup". But the part thats indicated in the manual on my bike looks like a dust cover, and is called a dust cover in the parts manual. Its round, nothing to put a spanner on to. Any help appreciated, cheers. |
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Evilchicken0
Joined: 12 May 2010 Posts: 2996 Location: London
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Posted: Fri Sep 30, 2011 11:49 am Post subject: |
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Not sure exactly but on most bikes you take the steering stem nut off, then the top yoke / tripple clamp. You should then see two nuts for a C-spanner loosen the top one and adjust the lower one.
You can't use a torque wrench on these (not without a special tool anyway) do them up, but remember it's not a big torque. Best to be to soft than to hard, ride it and redo them up again if you have to. _________________ Don't read everything you believe |
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2bims
Joined: 03 Apr 2010 Posts: 7289
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Posted: Fri Sep 30, 2011 6:30 pm Post subject: |
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Theres a screw that has to be removed from under a dust cap once you have taken the top yolk off and then theres a brass retaining pin to drift out. If you pm me your email address I could send by email the Bimota Workshop pages tha show you how, better than the handbook, very comprehensive. Would send the entire workshop manual but beyong my email limit sizewise, but fine for 4 or 5 pages |
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bluedog59
Joined: 14 Nov 2010 Posts: 37
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Posted: Fri Sep 30, 2011 6:31 pm Post subject: |
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If it's anything like a YB10 then it will have a small Allen bolt in the side,loosen this,screw the "dust seal" down the stem (it is threaded like a nut) and retighten the the Allen bolt. If you want to do it tighter than hand tight you can screw a longer Allen bolt in place (to long to clamp up) and use this for a LITTLE extra leverage but don't go mad. They don't need doing up super tight anyway,just enough to take out the slack.
( I really must dig my Dieci out from under the bench in the shed!!) |
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2bims
Joined: 03 Apr 2010 Posts: 7289
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Posted: Fri Sep 30, 2011 6:39 pm Post subject: |
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The other thing you haven't said is whether the steering is loose or too tight. If loose try tightening, if the bearings aren't shot that is. BUT, if too tight, the YB11 was known to have a rubber seal on the bottom bearing and headstock that was oversized and when turning the steering it dragged, making it heavy, simple trim with a sharp knife and grease around apparently is the trick |
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Ynot
Joined: 30 Sep 2011 Posts: 3 Location: New Zealand
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Posted: Sat Oct 01, 2011 11:58 am Post subject: |
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Thanks for the advice, great stuff! In answer to the question, the bearings are loose, not tight. With the front wheel in the air if you grab the bottom of the forks and you can move them back and forward and feel a clunk and see the movement of the fork and wheel. There shouldn't be any movement at all. I detached the steering damper and jacked up the front and checked to see that it turns nice and smooth lock to lock, no rumbles or notchy feeling. The reason I found it in the first place is I've been tidying up the cables. Had a problem with the choke cable getting stuck on the dash clocks, which caused very odd intermittant handing problems, but thats another story... That and I just got an Abba stand which allows me to jack up the front for the first time. I'm assuming its ok to put a jack under the exhausts? As there is no where else to put it that will work. I'm going to have a crack at doing the adjustment tomorrow |
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bluedog59
Joined: 14 Nov 2010 Posts: 37
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Posted: Sat Oct 01, 2011 4:30 pm Post subject: |
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A jack under the pipes is fine but I would put a piece of wood betwwen the jack head and the pipes to spread the load a bit. Also,if you are going to be undoing any major bolts such as spindles,brake bolts,yoke pinch bolts, I would loosen them before you jack it up. Don't want it falling over while you're swinging on a bolt. |
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