Calipers wont fit

[oohsam]

Wow, thanks for all the replies guys.
Nufnuf i might just take your offer on that based on how i go...thanks for the help!

Its clear there are several issues here with this front end.

This is what I've got so far (measurements and profile)
For the fork tubes (middle to middle) I got 185mm....

The right side (when sitting on the bike)



The left side (when sitting on the bike)



The calipers i have (2 diff sets)



So you're saying i need a bracket for this to bolt into ? hmmm... The top hole lines up, the bottom one doesn't as the disc is hitting the caliper, it wont go in any further.

[oohsam]

I think I have the right Forks, and the right discs based on bwringer's measurements. The spacers/axle is def. suspicious, so i'll def be pulling that apart and sorting that out. I think both calipers I have (with their brackets) are wrong....I think regardless of the spacing/axle issues, the calipers should still be able to bolt on ..right?

[rustybronco]

I think both calipers I have (with their brackets) are wrong....I think regardless of the spacing/axle issues, the calipers should still be able to bolt on ..right?

The squarish caliper looks correct but from memory the bracket doesn't.

http://imageshack.us/f/213/pict2855.jpg/

I 'might' have two spare '850G caliper brackets. I'll check the bin when I get home.

[oohsam]

Awesome. yeah the squarish caliper is the one that looks right...based on all the pictures I have and in my workshop manual...So the caliper should fit in the 'right' caliper bracket? fingers crossed!

Based on all the other images i've seen also, my axle looks very odd...

[JEEPRUSTY]

Don't the caps on the ends that hols the axle in place normally have a bit of space in them?

If not do ou have the worng axle?

[haggisbasher]

Tha caliper and bracket in the right of your pic the squarer one look a lot like the caliper and bracket on my 750L. The L has leading axle forks which would move the disk forward from your position I think and allow the holes to line up. I bow to more experienced GSers but I think the caliper will work you just need teh right bracket for the non leading axle forks.

Good luck
Tom

[7981GS]

Took some pic's and measurements for you this morning.
Your green measurement was closer to 72mm and the blue one was closer to 65mm.
The thickness of the caliper adapter was 12.90mm at the retaining bolt mount.









My rims and rotors are off getting polished and painted currently as I am making
repairs for the '82 GS1200G project that I started a thread on.
Let me know if you want measurements from GS1000G or GS1000L models as well.
The caliper adapter's from the '83 GS1100E model are much thicker at about 15.50mm.


Daniel

[rustybronco]

Took some pic's and measurements for you this morning.
Your green measurement was closer to 72mm and the blue one was closer to 65mm.

Just shy of 72mm...

I did have a spare set of brackets from a '80 G Chuck Hahn gave me. I took the left caliper and bracket assembly off of my '80 850G and bolted the left side spare in it's place. my caliper fits the spare bracket and the spare bracket fits the bike.

http://imageshack.us/photo/my-images/402/pict2954k.jpg/

http://imageshack.us/photo/my-images/6/pict2956t.jpg/

now that I've dug them out, what am I supposed to do with them?

[7981GS]

Just shy of 72mm...

I did have a spare set of brackets from a '80 G Chuck Hahn gave me. I took the left caliper and bracket assembly off of my '80 850G and bolted the left side spare in it's place. my caliper fits the spare bracket and the spare bracket fits the bike.

now that I've dug them out, what am I supposed to do with them?

Send them to "oohsam" in Australia so that he can mount his calipers.

Daniel

[chandler]

i am building a 1979 GS1000E and upgraded the brakes to the slotted rotors and newer calipers . i just went through the same exact problem you are going through the calipers are the same but the caliper carriers [the part that bolts to the forks ] are different for a L model because of the leading axle front forks but the G and E models are the same i bought 2 sets off of ebay befor i realised they were for a gs1000L and i could only get the top hole to bolt up .

[oohsam]

Wow thanks guys. You know what, its probably 72mm...I measured this witha measuring tape so I might be 1 or 2 mm out..seems as though I am.

RustyBronco -> I would love to send you some cash for your time and postage if you could spare them for me! Just name your price and i'll be happy to pay...

7981GS thanks so much for doing that for me I really appreciate the time you have taken..Looks like Rusty bronco's brackets are what I need.....

In the meantime Ill have to resolve the spacers and this axle, as from all your pics, my axle is very very wrong.

[oohsam]

Tha caliper and bracket in the right of your pic the squarer one look a lot like the caliper and bracket on my 750L. The L has leading axle forks which would move the disk forward from your position I think and allow the holes to line up. I bow to more experienced GSers but I think the caliper will work you just need teh right bracket for the non leading axle forks.

Good luck
Tom

Tom. I think you're spot on here. Just need a new bracket and part of my issue is resolved. Thanks heaps for ur input!

[rustybronco]

Wow thanks guys. You know what, its probably 72mm...I measured this witha measuring tape so I might be 1 or 2 mm out..seems as though I am.

RustyBronco -> I would love to send you some cash for your time and postage if you could spare them for me! Just name your price and i'll be happy to pay...

7981GS thanks so much for doing that for me I really appreciate the time you have taken..Looks like Rusty bronco's brackets are what I need.....

In the meantime Ill have to resolve the spacers and this axle, as from all your pics, my axle is very very wrong.

Measure the spacing again. it would be waste of time and money if those forks are off something other than a 'G'. when I get home I'll see what I can scrounge up for an axle and spacers as I bought good spares to re-plate for the Skunk so I should have a set or two. they might not be pretty, but they will suffice.

a few more things.... make sure the boots you have for the caliper slide pins are in good shape; the ones on those brackets are junk. I only have 'one guide, pad' you need three more. [#7 in this drawing http://www.alpha-sports.com/spst/1980%20GS850G/19.gif ]

name my price? how about I send them for the cost of shipping? if I can fit it all in a small flat rate box shipping will be $13.95 USD

send me a PM with your address and we'll work out the details

[7981GS]

oohsam, do you need pic's of the axle and spacers in the correct order/locations?

Daniel

[oohsam]

7981GS ->
Steve came round to my house yesterday with another Axle and we pulled it all apart to find out what was going on.
My axle on there looked too short, and the wheel wasn't centred between the forks.
So we pulled it off and had a look, and swapped out the axles and spacers etc.

We still couldn't get it perfectly centred, but it was better. So now I have 2 axles, 4 sets of spacers, and a few other spacers.
Looking at the schematic its a little difficult to see what goes where, and in what order.

If you have a picture of can whip up something quick of the order that the axle should be assembled it would be very very helpful.
I think I've tried most combinations but have more different ways to try it.