Stripped Pivot Bolt.

[beemer pimp]

Hi Guys....

I have a very creaking R1150GSA, all the bears have been changed except for the Swingarm (Bike done 140k, all year riding and rear Swing Arm, pivot never changed).
BMW said they couldn't get the bolt out ( this is a while back) and there was a risk of stripping the thread., anyway now I have a garage to work in I've had a go....

Even with lots of heat the bolt didn't budge, so kept heating..... unfortunatly instead of the bolt turning, the hex inside of the bolt stripped instead...
Hopefully picture attached.

Question is now, what are my options?

Read this thread , http://www.ukgser.com/forums/showthread.php?t=406924
One inmate had same problem
And you probably need one of them .
http://m.ebay.co.uk/itm/271566428827?varId=570391877319&_trksid=p2060353.m2749.l2649&_mwBanner=1

 

[Bikergary]

Oh goody, something else to worry about on my 1150!

I'm with mikeyboy; Easyouts general cause more probkems than they solve and should be thrown in the same bin as the adjustable spanners!

Dont worry..... putting this into perspective, the bikes riden all year round and clocked 130k miles and this is the 1st time I've needed to do this, probably if I had dont it way earlier I wouldn't be in this mess

 

[Bikergary]

That's the way I'd be inclined to tackle it too

But good job Mr Farkoff. I'll be keeping this in mind.


Sent from my SM-N910F using Tapatalk

My Ability is OK, this was the 1st step of re-building the whole back end of the bike... not a good start, I feel a bit more happier now so will attempt the drilling carefully ...

Last question, what size is the thread in the gearbox?

Hope the other side is easier.....lol

 

[Ian J Hartley]

Last question, what size is the thread in the gearbox?

You haven't been reading the replies or the links have you?

So for a refresher the size is:-

M24 dia X 1.25 thread pitch.

 

[Bikergary]

You haven't been reading the replies or the links have you?

So for a refresher the size is:-

M24 dia X 1.25 thread pitch.

Not all the links yet yet but thank you for that

 

[Ian J Hartley]

Correction

Having had another look at your problem, the threads for the fixed pins which are those on the right hand side are different.

They are M27 dia with 1.25 thread pitch

Ian

 

[DrAlf]

I've been here before. It's hard to see from your first photo how badly rounded off the hex is. Is there any purchase left at all? How much heat did you apply before attempting to remove? When I've tackled this job previously I've clamped a hot air gun in line with the pin and left it for a good 5 minutes until the pin is smoldering hot. I've also use a blow torch almost directly on the pin and heated until glowing. If there's any purchase left at all on the pin, I'd invest in a good quality hex bit and a very long breaker bar, apply loads of heat and try one more time - before progressing with all excellent advice above.

Good luck and let us know how you get one. PITA when this stuff happens

 

[Bikergary]

Finally done

It's been a busy year but did finally get the bolt cut out, the loctight was like concrete, no matter how hot we got it, it wouldn't budge, and the thread did get damaged getting it out.

Managed to get a Tap and clean the thread and now all back together with new Bearings and bolts..... that should do it for another 10 years

So thanks for all your help.

 

[ahebron]

Sorry Cookie its not Its Dural Alloy that's why the bastardin things round out

I've had this loads through the years and its a total cluster fuck! Yesterday I hit myself fucking hard in the bake trying to get one of these cunting hoofwanking bastardin pins out of my own 1200GS

Get a Thin "Stainless" cutting disc in a 4 inch Grinder and go buy some De Walt Bullet Drills 4 6 8 and 10 mm They are a total asset in a garage and Before I start one of these again I'll make sure these are at hand They may cost you £15 but the way they glide through the alloy is a joy

VERY carefully and slowly cut half the head off the Pivot Pin

Then when you can clearly see the definition of the circle of the out side edge of the pin and the gearbox starting drilling in perpendicular to the surface and working your way across so you basically split the pin in half and relieve the pressure of corrosion from the inner end which NEVER ever can get cleaned

this was my first effort at this method a while back but it worked and the bike is back home and happily doing miles ** I was about a mm too close to the box with the cutting disc

You can see a hole about centre that's where the dormer drill bit broke off!!

N.B. Do NOT hammer anything in to the hole IN this instance, All you are doing is expanding the pin even further and making it tighter and tighter

Please believe me I have been doing this for years and the Safest Way is to drill and split the pin across the Surface I cut half the head off because I didn;t know where the threads started and I did not want to drill through the gearbox outside of the pin area

I thought De Walt Bullet drill sound interesting so I googled them and came up with this

http://technabob.com/blog/2012/06/21/dewalt-drill-handgun/
Seems a bit extreme but if it works who am I to judge.

Adrian

 

[Danger37]

Hi Sir,

I'm having an issue removing the pin on my 97 R1100RS. I'm going to try to grind have the face off like you did. Can you explain to me what I'm supposed to do after that with the drill bits.
What is supposed to happen? How do you get the rest of the bolt out?

Thank You!

 

[DrFarkoff]

Hi Sir,

I'm having an issue removing the pin on my 97 R1100RS. I'm going to try to grind have the face off like you did. Can you explain to me what I'm supposed to do after that with the drill bits.
What is supposed to happen? How do you get the rest of the bolt out?

Thank You!

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You have to cut off the outside disc of the pivot bolt so that you can see where the thread starts !!

If you start drilling at the outer side You will drill the gearbox !

Or if you can find centre and draw a centred 25mm circle?? you can start without cutting the outer part off staying "just" to the inside of the circle making sure your drill does not roam out side the circle or you are cutting the threads on the gearbox

If you carefully drill a line of drill holes across the pivot pin and "join" them up? The pin then becomes looser in the hole and you an remove it in bits usually

If you "nick" the threads you can tidy them up Right side "fixed" Pivot thread is M27 x 1.25 and the left side "adjustable" is M24 x 1.25 Or just remove the gearbox and swingarm and take it to a machine shop, and let the professionals have a go ?