I got myself a "bike"

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Re: I got myself a "bike"

Postby boxerman » Wed Jul 11, 2018 11:46 am

is this normal?
Yes.
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Re: I got myself a "bike"

Postby CaptAirhead » Wed Jul 11, 2018 12:55 pm

I have also noticed that the left footped is 2 inches or so further forward than the right one, is this normal? I think maybe different lengths are for different style of bike perhaps and I have one off two different sorts.
If you look at the offset of the cylinders from the top, you will see why.
ImageBMW R80/7 by Ian Beat, on Flickr

You hardly notice it at all when riding.
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Re: I got myself a "bike"

Postby Mjolinor » Wed Jul 11, 2018 12:57 pm

is this normal?
Yes.
Well damn! that is weird. :)

So onto the clutch. I have taken it off. Neither of the exploded views in Haynes are the same as mine.

My naming, as I probably don't know what these bits are called.
From the back of the bike towards the front:
Spacer
Friction plate
Pressure plate
Spring
Flywheel

My clutch has 6 bolts with a conical taper at the head to centre the spacer so no washer on the bolt like the one shown in Haynes. On the other side of the spacer Haynes says there is a thick washer on each bolt. I had 5 so one missing D'oh. Clearly not as it should be.

I have assembled the three components, pressure plate, friction and spacer and they seem to fit together fine without a spacer between the pressure plate and the spacer. I can see no way to assemble this with the six spacers in anyway unless I use superglue to hold the 6 spacers in place when I assemble. With the three pieces held together and no spacers the gap between pressure plate and spacer is around 5.5mm , if I put spacers then the gap is about 3mm more than the thickness of the friction plate, 8.5 mm or so. The two friction plates I have are 5.51 and 5.58 mm thick.

I have tried googling for exploded diagrams but nothing that will tell me if I need these spacers or not, some diagrams show them and some don't. The thickness of each of these 6 spacers will move the clutch 3mm towards the back of the bike and that is exactly the space I have when I offer the gearbox up.

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Re: I got myself a "bike"

Postby Mjolinor » Wed Jul 11, 2018 1:02 pm

This is what I am talking about:

https://www.bmwclassicmotorcycles.com/p ... ts/clutch/

Item 4 is the one that I think I should not have.

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Re: I got myself a "bike"

Postby Rob Frankhamr » Wed Jul 11, 2018 5:35 pm


I have also noticed that the left footped is 2 inches or so further forward than the right one, is this normal? I think maybe different lengths are for different style of bike perhaps and I have one off two different sorts.

This is quite normal... all airheads have one footrest further forward than the other. Don't quite know why except that one cylinder is further forward than the other. Can't see any reason why that should affect the positioning of the footpegs but there you are...they're all like it.

Rob
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Re: I got myself a "bike"

Postby CaptAirhead » Wed Jul 11, 2018 7:39 pm

I think it's so that both feet are under the cylinders and remain at the same cosy temperature. German efficiency!
Ian.
If you don't make mistakes, then you aren't trying hard enough!

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Re: I got myself a "bike"

Postby Mjolinor » Wed Jul 11, 2018 8:20 pm

Can someone please tell me how the loom routes from the headlight. Under the bottom yoke, between the front down tubes and along the offside of the top frame tube or does it go above the bottom yoke?

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Re: I got myself a "bike"

Postby ts » Wed Jul 11, 2018 8:20 pm


So onto the clutch. . . . . . My clutch has 6 bolts with a conical taper at the head to centre the spacer so no washer on the bolt like the one shown in Haynes. On the other side of the spacer Haynes says there is a thick washer on each bolt. I had 5 so one missing D'oh. Clearly not as it should be.
Those thick washers are only supposed to be between the two pressure plates of the /5 series clutch, not the /6 and later ones. That may well be the reason your gearbox didn't fit properly.

If you check out the parts fishe diagrams om MAX BMA motorcycles (<https://shop.maxbmw.com/fiche/DiagramsM ... d=07242017), they show how it should fit together.

I replaced the rear main oil seal in my R75/5 only a couple of weeks ago, which necessitated removal of both the clutch and flywheel - and I agree with you that those six "spacers" are tricky to hold in position before you slide the bolts through them when reassembling!
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Re: I got myself a "bike"

Postby Mjolinor » Wed Jul 11, 2018 8:32 pm

I have put it together without them and it seems OK. I can kick it over now, well more truthfully I could kick it over if I were not 63 and just had a heart attack. It has a lot of compression. Is copper grease OK for the splines or something else. I would normally use just graphite but there are traces of copper grease already in there.

Still not found the clutch actuator bits and I think I have exhausted the possible places for it, all boxes emptied and re-categorised into other places. There were a few weird shaped springs and a safety valve of a pressure cooker that don't seem easy to place on the bike anywhere.

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Re: I got myself a "bike"

Postby CaptAirhead » Wed Jul 11, 2018 8:53 pm

Don't use copper or graphite grease for the splines. Chris Harris recommends Starburags grease for the clutch splines but if you can't get it you can use Honda 60 paste or Castrol Molub-Alloy Paste White T.
I use LM47 Liquid moly for the final drive splines.
Ian.
If you don't make mistakes, then you aren't trying hard enough!

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Re: I got myself a "bike"

Postby andyb » Wed Jul 11, 2018 9:59 pm

That pressure cooker safety valve is useful if you want to supercharge the engine.....
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Re: I got myself a "bike"

Postby Mjolinor » Thu Jul 12, 2018 5:55 pm

OK. I have routed the loom on top of the bottom yoke through the triangle formed by the down tube, steering head and strengthening plate (tight fit that) and along the offside of the top tube. Is that correct?

Two pictures here of all the round things I have. The only bit that seems to be clutch push related is the rubber cover for the arm.

Can anyone see any of my missing bits?
20180712_132328.jpg
20180712_132324.jpg
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Re: I got myself a "bike"

Postby Mjolinor » Thu Jul 12, 2018 5:59 pm

Two more questions. Where does the hazard switch go. The loom comes out of the bottom of the headlight about half a meter long and splits with a relay on one leg and the hazard switch on the other.

It seems too long to need to go up to the speedo but it aint much use under the tank.

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Re: I got myself a "bike"

Postby CaptAirhead » Thu Jul 12, 2018 6:53 pm

The hazard switch is held on to the centre of the bars with a hose clip and pokes through a square hole in the crash pad:-
ImageBMW R80 TIC Hazard switch by Ian Beat, on Flickr

The hazard relay on my R80/7 is located on the left hand side of the frame, under the tank, beside the starter relay.

Ian.
If you don't make mistakes, then you aren't trying hard enough!

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Re: I got myself a "bike"

Postby Mjolinor » Thu Jul 12, 2018 7:29 pm

The hazard switch is held on to the centre of the bars with a hose clip and pokes through a square hole in the crash pad:-
[
The hazard relay on my R80/7 is located on the left hand side of the frame, under the tank, beside the starter relay.

Ian.
Damn that's pretty aftermarket. :)

Cheers.

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Re: I got myself a "bike"

Postby Mjolinor » Thu Jul 12, 2018 7:31 pm

Should I keep all this on one thread?
Useful for me but awful for anyone else trying to find info once it gets to over 10 pages or so.

Should I start a new thread for each new topic?
Fills the forum with posts so more for people to search through.

I suppose it's a matter of how this particular forum does it.

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Re: I got myself a "bike"

Postby andyb » Thu Jul 12, 2018 7:57 pm

To go back to the footrests....mine are in line, R100R, so there was a change from earlier airheads at some point. Perhaps when they gained the paralever rear end.
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Re: I got myself a "bike"

Postby Galactic Greyhound » Thu Jul 12, 2018 8:27 pm

Should I keep all this on one thread?
Useful for me but awful for anyone else trying to find info once it gets to over 10 pages or so.

Should I start a new thread for each new topic?
Fills the forum with posts so more for people to search through.

I suppose it's a matter of how this particular forum does it.

Long threads make it very difficult to follow what's going on, especially of they reach 10 pages or so as you say.
People need to be able to easily go back to earlier posts for verification of what has gone by in a thread.

My take on this is to start a new thread for each topic raised e.g. Clutch rebuild, Gearbox rebuild, Forks rebuild etc.
You might also provide a link in each new thread to the previous thread so that folks can chase all the threads back to the original (this one) if they wish.
Ced.

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Re: I got myself a "bike"

Postby george baker » Thu Jul 12, 2018 8:40 pm

Hi
I agree with Ced but think you should pick a uniform title to keep them together.

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Re: I got myself a "bike"

Postby Neil.BM » Thu Jul 12, 2018 9:13 pm

Personally I like it all in one thread so I can follow the progress of a build/rebuild. My favourite threads these - but that's just me :)

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Re: I got myself a "bike"

Postby Neil.BM » Thu Jul 12, 2018 9:18 pm

We even have a guess the part competition!

I'll start by pointing out that the rubber grommit in the tub looks like a push-rod tube seal, and the two 'pistons' might be cam followers? Also, the pin in the tub could be the clutch actuation arm pivot - can't see the other end properly.

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Re: I got myself a "bike"

Postby Mjolinor » Thu Jul 12, 2018 10:09 pm

We even have a guess the part competition!

I'll start by pointing out that the rubber grommit in the tub looks like a push-rod tube seal, and the two 'pistons' might be cam followers? Also, the pin in the tub could be the clutch actuation arm pivot - can't see the other end properly.
Good input. I wondered about that pin or whether it should be a nut and bolt. That pin has a small head on and I think there is a circlip that fits the other end.

Now, you want a guess the part? WTF is this?
20180711_153638.jpg
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Re: I got myself a "bike"

Postby Rob Frankhamr » Thu Jul 12, 2018 10:25 pm

:dontknow: :dontknow:

No idea... don't think it's an airhead part...

Rob
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Re: I got myself a "bike"

Postby Mjolinor » Thu Jul 12, 2018 10:29 pm

:dontknow: :dontknow:

No idea... don't think it's an airhead part...

Rob
Hmm, I should probably stop Googling for it then. :)

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Re: I got myself a "bike"

Postby Rob Frankhamr » Thu Jul 12, 2018 10:54 pm

OK. I have routed the loom on top of the bottom yoke through the triangle formed by the down tube, steering head and strengthening plate (tight fit that) and along the offside of the top tube. Is that correct?

Two pictures here of all the round things I have. The only bit that seems to be clutch push related is the rubber cover for the arm.

Can anyone see any of my missing bits?
I've label what I think a number of the bits are (if there's a question mark, I'm not sure). In fact, a very few of those parts are worth saving.
Bitz (Custom) (1).jpg
Oh, one I missed... can't quite see if the plate at the bottom is the oil pump cover or the oil filter cover... but it's one of the two.

Rob
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