|05-24-2011, 04:27 AM||#1|
Joined: Jul 2008
Ontic's 1981 R80G/S build-up thread
The time has come,
here's the thread I've been meaning to start for a long time, the progress to date, the plans to come, and the questions arising...
It started with a walk in the bush. I was just beginning a renovation on a friends property in a forrested zone by the river not too far from my city. I'd spent the day cutting up a big old rusted watertank and piling it into a skip.
Now that the watertank was gone, and I got thirsty, I had to walk next door to fill up a large water cooler from their rainwater tank...
what do I find but this,
A damsel in distress!
I'd wanted a R80G/S for quite a while. In fact it was the bike I wanted before I settled on my R90/6 (because G/S's were too hard to find and too expensive!)
This old girl was looking very neglected. Sitting out here in the weather when there was a perfectly good shed not far away where it could have sat under shelter.
The little details all pointed to general neglect and lack of care....
Anyway, to cut a very long drawn out story very short: I put the feelers out, found out the owner was wanting to sell, but hadn't advertised yet, and we worked out a price. I bought it and rode it home 8-9 months ago.
Battery virtually dead.
Starts easily and runs very well.
Shifter linkage is loose from a destroyed bush, but still it shifts OK and gearbox feels fine.
Biggest scare is a bit of knocking coming from the front of the engine once it has warmed up and settles into a low idle... sounds like a loose timing chain.... I HOPE it is a loose timing chain!
There is all sorts of rust and corrosion and damage from sitting out in the weather and being treated hard.
thats a start at least...
It has rusty stainless steel headers- later found out to be home made/custom, and a staintune exhaust, later found out to be adapted from another bike.
The rear shock was leaking and on the test rides and the ride home just bounced along hopelessly. Turns out it is an old Koni and after pulling it apart it is most likely un-repairable.
I had bought this thing for a pretty good price, but at a time I really should not have bought another bike, so it had to just sit there for while until I figured out my plans and gather funds to start.
I started pulling things apart and putting them back together.
Rear shock: as mentioned, cactus.
Speedo: pulled it apart- not pretty. Nothing worked, everything rusted, seized and/or broken. During my efforts to fix it a fellow boxerworks member donates a R65 speedo and I manage to cobble together a working G/S speedo between the two. This is a long story cut short. Here's the photos
one of many rusted, swollen and seized parts: this one repaired by electrolysis rust removal
silver gear on top right was spinning, and the shaft running through the white gears on the bottom for the trip meter was completely swollen and siezed: again, electrolysis and a lot of patience and persistance repaired this part.
so, while the speedo hung out in parts in a box I gradually fiddled with other things...
swapped on some appropriate valve covers..
earlly stages of cleaning things up. Heavily corroded.
as you can see, a hell of a lot more work to do yet.
eventually I fixed my speedo.
it now works and looks nice too.
There was a lot of work in this, but I won't go into it unless anyone is interested.
One may notice I have reset the odometer. Due to the non-matching frame/engine numbers on my bike I was under the impression that the engine had been swapped at some point- and combined with a speedo/odo that had not worked in a while I didn't put too much importance on the numbers that were showing... since then I have learned that the numbers of this era of bmw may have come from the factory not matching??
Anyway, I know the insides of this thing like the back of my hand, so I may re-set the thing to the numbers I got it with... we'll see.
more on that later maybe.
Next post coming up:
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