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Breva 750 head bearings

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nab301 View Drop Down
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    Posted: 17 Feb 2018 at 20:12
Originally posted by Brian UK Brian UK wrote:

Especially with the Mandello grease famine.

I guessed this sentence would become reality at some stage although i'm not sure whether it's lack of grease or just plain lack of maintenance.  I'm almost  too embarassed to post the photos ... I've owned older bikes in the past but nothing prepared me for how bad the bearings on my '04 Breva would be.
I had pencilled in Bearing replacement /inspection  after a test ride but amazingly  it was only in wet slippery conditions that the handling was a bit iffy  , having said that  i'm still assuming that this will cure the "handling problems "  I've ended up having to seek professional  help for the first time in 20 yrs  , 2 stainless 8mm screws for the front mudguard l/h fork slider just don't want to part company Ouch
 I'm really looking forward now  to  inspecting the swing arm bearings.   Oh,  and the front wheel bearings  are a tad rough tooLOL

photos are the lower race the top one had grease..

Nigel
Keep smiling , it makes people wonder what you've been up to!
'04 Breva 750, '99 Bmw R1100S, '06 Triumph Bonneville '05 CBF 250, '03Bullet 65 500, '93 MZ301 Saxon fun
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 17 Feb 2018 at 20:20
Those have been too tight for some time. Maybe a previous owner thought that would replace a steering damper.
But if the wheel bearing is rough too, suspect a pressure washer has been used.
Brian.

Better 5 minutes late in this world than years early in the next.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote redmunk Quote  Post ReplyReply Direct Link To This Post Posted: 17 Feb 2018 at 23:19
Stainless screws in cast aluminium in areas like the forks where road salt can get to both ends of the bolt generally isn’t a good idea - the two dissimilar metals form effectively a little battery and corrode each other. Zinc plated all the way!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote johnno Quote  Post ReplyReply Direct Link To This Post Posted: 18 Feb 2018 at 09:56
a few weeks back I changed head bearings on my GSXR1100 I only noticed a slight pull to the right sometimes because over time I had not noticed a decline . After changing head bearings the difference was amazing I now got pin point accuracy and the bike now flows around the bends .Enjoy once your head bearings are renewed . Head bearings only need the slack taken out of them , I do around 300 miles then recheck when bedded in .
GSXR1100 L ,Moto Guzzi 650tt/ntx.750xpa,t5 850.1100 sport,1100 sport corsa rider
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 18 Feb 2018 at 10:59
Originally posted by johnno johnno wrote:

Head bearings only need the slack taken out of them , I do around 300 miles then recheck when bedded in .
Absolutely, no friction, no pay.
Brian.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote nab301 Quote  Post ReplyReply Direct Link To This Post Posted: 26 Feb 2018 at 21:09
Originally posted by Brian UK Brian UK wrote:

Those have been too tight for some time. Maybe a previous owner thought that would replace a steering damper.


I reassembled over the weekend , and it's beginning to feel like a half decent bike now   , although it now has  violent head shake in the hand  off the bars test when slowing down( it was perceptible before with the overtight bearings) .... generally on non Guzzi bikes  , tyre changes have sorted this for me in the past or is it a Guzzi trait which might explain the overtight brgs?
Another query  , The bolts for the top yoke could do with replacing but I can't  see them listed in any online parts list. ( only the lower ones)

Nigel
Keep smiling , it makes people wonder what you've been up to!
'04 Breva 750, '99 Bmw R1100S, '06 Triumph Bonneville '05 CBF 250, '03Bullet 65 500, '93 MZ301 Saxon fun
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 26 Feb 2018 at 21:37
No it's not a Guzzi trait.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote johnno Quote  Post ReplyReply Direct Link To This Post Posted: 27 Feb 2018 at 07:38
You no doubt already have checked your wheel bearings and also swinging arm for movement the other thing is check your engine bolts are tight .Best of luck
GSXR1100 L ,Moto Guzzi 650tt/ntx.750xpa,t5 850.1100 sport,1100 sport corsa rider
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Post Options Post Options   Thanks (0) Thanks(0)   Quote johnno Quote  Post ReplyReply Direct Link To This Post Posted: 27 Feb 2018 at 07:41
Just check again you have no play at steering head ,
GSXR1100 L ,Moto Guzzi 650tt/ntx.750xpa,t5 850.1100 sport,1100 sport corsa rider
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Post Options Post Options   Thanks (0) Thanks(0)   Quote nab301 Quote  Post ReplyReply Direct Link To This Post Posted: 27 Feb 2018 at 19:30
Thanks for all the replies   , I'll  report back when I have it sorted....  ( hopefully the power of positive thinking will helpLOL
Nigel
Keep smiling , it makes people wonder what you've been up to!
'04 Breva 750, '99 Bmw R1100S, '06 Triumph Bonneville '05 CBF 250, '03Bullet 65 500, '93 MZ301 Saxon fun
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DavieL Quote  Post ReplyReply Direct Link To This Post Posted: 27 Feb 2018 at 21:38
Squared off rear tyre or front wheel balance issue?

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Post Options Post Options   Thanks (0) Thanks(0)   Quote nab301 Quote  Post ReplyReply Direct Link To This Post Posted: 28 Feb 2018 at 17:04
Originally posted by DavieL DavieL wrote:

Squared off rear tyre or front wheel balance issue?


Rear tyre is new  but I'll be checking everything over the next couple of days .
Nigel
Keep smiling , it makes people wonder what you've been up to!
'04 Breva 750, '99 Bmw R1100S, '06 Triumph Bonneville '05 CBF 250, '03Bullet 65 500, '93 MZ301 Saxon fun
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Post Options Post Options   Thanks (0) Thanks(0)   Quote nab301 Quote  Post ReplyReply Direct Link To This Post Posted: 10 Mar 2018 at 20:09
Finally  sorted my head shake  with a new  front tyre , on close inspection the front bearings were ok but as I had some and the wheel was off I replaced  them as a precaution.
No head shake now at any speed, slowing down or accelerating, and generally the bike just feels way better than it has since  I first got it. Thanks for all the suggestions.
  


Nigel
Keep smiling , it makes people wonder what you've been up to!
'04 Breva 750, '99 Bmw R1100S, '06 Triumph Bonneville '05 CBF 250, '03Bullet 65 500, '93 MZ301 Saxon fun
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Post Options Post Options   Thanks (0) Thanks(0)   Quote johnno Quote  Post ReplyReply Direct Link To This Post Posted: 10 Mar 2018 at 20:52
GSXR1100 L ,Moto Guzzi 650tt/ntx.750xpa,t5 850.1100 sport,1100 sport corsa rider
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