Need dimensions '81 GS750E front disc & pads

[1978GS750E]

Speaking as a mod on a couple of forums,it is much easier for people to figure out what someone posted when the pics they refer to are all present & visible. If someone hosts their own pics and their interests change they often eventually decide that they need the web space more for their new interests and the pics disappear. The same if they change web services and don't bother to move the pics (or fix the links) or if their heirs don't maintain them.

What puzzles me here is that it let me upload 5 pics in 5 posts but it wouldn't let me upload 3 pics in one post.

OH NO!

Please tell us that you have never, ever, ever:

Worked on helicopters.......or repaired speakers......or made your own violins......or owned an electronics shop.........or own a CB400 that was hand built by Yoko Yamamoto, or somebody like that....and most importantly...........

Had a ZZR1200 with a homemade exhaust!

(Just kidding around, some on this forum will get it!)

 

[Guest]

I used to design speakers in a previous life. Does that count

I also used to have a couple of Suzukis. This was my '78 GS400 when it was attached to a Jawa sidecar

 

[Guest]

I drove that for a couple of winters and learned how hard winter is on motorcycles. And on drive chains. I replaced it with something with shaft drive and resto modded it

 

[Guest]

Long story including a car turning left and writing off my winter machine and a friend giving me most of an '83 GS400 and I put this together. But the chain drive didn't hold up so I want back to shaft drive Hondas with sidecars after a couple of years

 

[Guest]

​My current machines:
In the background the '83 GL1100 with modified Dnepr sidecar on that I drive in the nice half of the year and in foreground the '84 CX650E (a few parts are still original) with modified Velorex sidecar body on Ural sidecar frame that I drive in the cold & messy half of the year

 

[Grimly]

Before & after milling. I removed a hair under 0.5mm per pad and there's adequate clearance for the 7mm disc now as long as I leave the pad shim out. Anyone know a reason I need it? The Honda calipers don't have anything like that.

The shims in mine disappeared thirty years ago and never a problem.
They're supposed to stop rattling and squealing, and maybe they did, but it's not something that's ever occurred with mine.

 

[Guest]

Thanks. I won't worry about it then.

BTW, I was thinking about the 7mm thick disc I'm using for this and IIRC it is from a GT380.

 

[Guest]

I just realized that I left this thread hanging. I won't go into all of the details but I ended up turning some spacers from 3mm thick aluminum on my little lathe so that the disc would end up centred in the caliper and visiting a friend with a big lathe to decrease the O.D. of the disc a couple of mm to fit inside the caliper and increase the I.D.to fit my hub. I also gave the forks a fresh coat of paint (I've tried keeping bare aluminum in decent shape in the winter but it was a losing battle).
By mid October the new disc was bolted to the wheel, the new tire was on and I was ready to start putting it back together but when I disassembled the old brake system so that I could connect the GS caliper and the new master cylinder (the old one's bore wasn't suitable for this caliper) to my 23 year old stainless braided line I discovered that the braid had been damaged by rubbing where it was zip tied to the eye bolt on the fender (I zip tied the new line to the eye bolt loosely so hopefully between that and the new line's plastic sheath that won't happen again).
While I waited for a new line & fittings to arrive I jacked up the rear of the bike, did general maintenance there and changed that tire too.
By the end of October it was back together with all 3 wheels on the ground

 

[Guest]

Over the next few days I test drove it a couple of times and did a few odd jobs like mounting the hand guard (absolutely necessary in winter) to the new master cylinder and generally got it ready for the season and on Nov.4th I moved the summer machine into the shed for winter storage and the CX became my daily driver. I won't really know for sure until spring but I like the new front brake so far.

Thanks again for all the help.

Here's a pic I took last week


BTW, you may have noticed the camera mount. I occasionally take videos of rides and post them on YouTube. Here's a video I took on the summer machine a few days before I put it away for the winter

 

[sorenlan]

I just realized that I left this thread hanging. I won't go into all of the details but I ended up turning some spacers from 3mm thick aluminum on my little lathe so that the disc would end up centred in the caliper and visiting a friend with a big lathe to decrease the O.D. of the disc a couple of mm to fit inside the caliper and increase the I.D.to fit my hub. I also gave the forks a fresh coat of paint (I've tried keeping bare aluminum in decent shape in the winter but it was a losing battle).
By mid October the new disc was bolted to the wheel, the new tire was on and I was ready to start putting it back together but when I disassembled the old brake system so that I could connect the GS caliper and the new master cylinder (the old one's bore wasn't suitable for this caliper) to my 23 year old stainless braided line I discovered that the braid had been damaged by rubbing where it was zip tied to the eye bolt on the fender (I zip tied the new line to the eye bolt loosely so hopefully between that and the new line's plastic sheath that won't happen again).
While I waited for a new line & fittings to arrive I jacked up the rear of the bike, did general maintenance there and changed that tire too.
By the end of October it was back together with all 3 wheels on the ground. here

I'm also impressed with your ingenuity. Turning the spacers from 3mm thick aluminum is a great solution to the centering problem. And visiting a friend with a big lathe to decrease the O.D. of the disc is a creative way to make it fit.
​

 

[Rich82GS750TZ]

Sorenian, I’d like to believe that it was an accident that you inserted a link to a Romania online Casino when you quoted Sidecar Bobs Post. Otherwise, that’s a good way for a new guy who’s made no mention of his own motorcycle to get the boot.

 

[Guest]

That kind of thing seems to be a problem on a lot of forums these days. I moderate on a couple and on the one that has a lot of activity we spend a lot of time dumping spammers.