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Old 01-24-2013, 08:04 AM   #16
Airhead Wrangler
Adios Mexico
 
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Joined: Mar 2008
Location: Back in Seattle, FINALLY
Oddometer: 6,280
Damn. You're brave.



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R80ST Gets The HPN Treatment
Seattle to TDF on an airhead

Current rides: HPN #834, '93 R100GSPD "red rocket", '73 R75/5 Toaster mongrel, '80 Ducati Pantah 500SL, '92 DR350, '67 Honda SS50, '80 Honda Chaly.
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Old 01-24-2013, 11:46 AM   #17
Bigger Al
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Joined: Oct 2004
Location: Auburn, CA
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Quote:
Originally Posted by Foot dragger View Post
Wow! Just for posterity you should keep track of the hours involved in this very loving bringing back of a bike from the dead. I once did a minor frame/fork swap on a 76 R75/6 as it had hit a car. It became my only purpose for getting out of bed for 3 months and consumed my every waking moment re-building/cleaning every inch of it.

Of course for the money/time it ended up costing me I could have waltzed through craigslist and bought any number of running airheads...................but whats the fun in that?

Best of luck and enjoy!

You gave up too soon.





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Old 01-24-2013, 04:52 PM   #18
mike54
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Quote:
Originally Posted by Airhead Wrangler View Post
Damn. You're brave.



I keep re-reading, you purchased that.
Good job, that's going to be one tidy bike.
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Old 01-24-2013, 09:41 PM   #19
helion42
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Location: Salt Lake City, Zion Curtain, UT
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Looked like something dragged up from the ocean. Great story! It's really turning into a nice runner.
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Old 01-25-2013, 12:19 AM   #20
RobboJ OP
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Location: Sussex by the Sea, UK
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It had been sitting outside of a barn (is that still a barn find?) with 2 r50/2's for about 30 years. I live by the coast and the salt air had really gotten to it. My friend had both the /2's, sold one on and used the money to work on the other one. I will try and get a few photos of that next time I see him.
I had to pull inch thick bramble from between the frame to even move it from where it stood. Needless to say I had to replace a lot, although some stuff came up really well with a little bit of elbow grease
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Old 01-27-2013, 09:22 AM   #21
Leadnuts
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wow just wow

That is an amazing transformation!


Did you run all your own wires instead of using a oem harness? I was thinking about doing it myself but when I look at all those wires it makes me super nervous...
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Old 01-28-2013, 09:10 AM   #22
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I have been making my own loom and will use a rubber housed terminal connector under the tank, with a spade fuse box under the tank too.
I had a chance to work on it over the weekend, I think the basic wiring is nearly complete. I'm just waiting for new switchgear to arrive and a battery to test it with before I route it all and apply the heat shrink and BMW wiring tape...
[IMG]Untitled[/IMG]
[IMG]Untitled[/IMG]
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Old 01-28-2013, 09:18 AM   #23
Blane
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Quote:
Originally Posted by RobboJ View Post
I have been making my own loom and will use a rubber housed terminal connector under the tank, with a spade fuse box under the tank too.
I had a chance to work on it over the weekend, I think the basic wiring is nearly complete. I'm just waiting for new switchgear to arrive and a battery to test it with before I route it all and apply the heat shrink and BMW wiring tape...
[IMG][/IMG]
[IMG][/IMG]
Wouldn't it have been easier just to buy the /5 frame and engine wiring harness?

You've got more guts than I. Great job in getting a basket case back on the road.
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Old 01-28-2013, 09:21 AM   #24
yokesman
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did you put in unleaded valves,those /6 were one of the hardest accelerating bike going in the day-stock.nice would like to do a 100 with electronics for 2up rtw,but .
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Old 01-28-2013, 09:28 AM   #25
RobboJ OP
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As it's a /6 with /5 parts i could have adapted a /6 harness I guess, but I was taking a few things out and adding a few things in and moving plenty around. I though it would be a nice project and then if anything went wrong I would know where it was and how to fix it easily. I like the /6 frame and gave the tail of the subframe lift as well as shortening it, getting a /5 frame would have been quite expensive. Considering I paid 100 for the bike I was happy to spend a little more on replacing things and more time on changing or making things.

One question I have:
The twin output coils, do they have to be a certain way around? There are no -ve or +ve markings on the terminals. Does it matter which way round they are wired up?
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Old 01-28-2013, 09:29 AM   #26
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Yeah unleaded valves, the head is from a later R80 and has unleaded valves and twin plug conversion. Might accelerate a little better than standard - only a little
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Old 01-29-2013, 09:23 AM   #27
yokesman
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twin plugs are more for preignition problems than performance. the old combustion chamber with the newer gas is not a great combo.
If you want the performance then the conversion to a bathtub chamber is the answer but reliablity may suffer.
ducati 900 with the conversion were at about 95rwhp.
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Old 01-30-2013, 11:57 PM   #28
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What's a bathtub chamber?
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Old 01-31-2013, 12:16 AM   #29
Houseoffubar
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the coils can be connected either way!

Nice work so far, really nice!
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Old 04-11-2013, 12:08 PM   #30
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I'm just waiting for Flickr to upload my latest pictures then I'll post them here...
Basically I have nearly finished!
The loom still needs to be wrapped but it all works, I fitted a new Valeo 8 tooth starter motor and it works a treat, Boyer ignition is in the mail to fit at the weeken, all lights are working and all cables bar choke cable have been renewed.

I started the bike for the first time today, it started and ran very smoothly. I had the head covers off and let it run for about a minute on the , and oil dripped from the l/h head, but not the right. Is this normal or should equal oil be getting to both heads?
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