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Daves79x
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VBMWMO #9030
Joined: 08/09/2015
Posts: 304

Finally just about finished with the R50 project, the bike-in-a-box. The project took about a year and a half. Started on about the 5th kick. Seems to run and sound well. Ran for about 5 minutes, then an overnight cool-down. I'll re-adjust the valves and torque the heads. Then wait for some decent weather to actually ride it! Thanks to everyone that helped with advice.

Dave

  • img_0317.jpg
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Dave

malmac
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VBMWMO #8751
Toowoomba, Australia
Joined: 06/29/2014
Posts: 268
What colour did you use?

The colour on my screen looks great. Which cream did you use?

Thanks

Mal

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mal - R69s
Toowoomba- Australia

808Airhead
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Joined: 08/05/2009
Posts: 1010
Congratulations!!!! Now put

Congratulations!!!! Now put some miles on her!!

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Thomas M.
R69s - R60/2 - R67/2 - R51/3

Daves79x
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Joined: 08/09/2015
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Color

Mal - the paint is GM paint code 059 - Frost Beige. It's PPG single-stage paint. It is just fabulous to work with - it can be wet-sanded and buffed to perfection. Touches up great too, for the inevitable little sins that occur during re-assembly! Thanks for the comments.

Dave

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Dave

stagewex
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Joined: 10/26/2014
Posts: 464
Looks incredible. Congrats.

Looks incredible. Congrats.

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mike wex/stagewex
1969 BMW r60/2, US Model, 1995 BMW K75, 2006 Yamaha TW200, 2007 Ural Patrol

malmac
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Toowoomba, Australia
Joined: 06/29/2014
Posts: 268
Thank You Dave

Daves79x wrote:

Mal - the paint is GM paint code 059 - Frost Beige. It's PPG single-stage paint. It is just fabulous to work with - it can be wet-sanded and buffed to perfection. Touches up great too, for the inevitable little sins that occur during re-assembly! Thanks for the comments.

Dave

Thanks Dave

My next major project is refurbishing our R69s and it will be a colour like yours.

Thank you for passing on the info on the paint - it looks perfect in the photo as displayed on my screen.

The R50 engine is a gem and in lots of ways the best iteration of the generation in terms of smoothness.

Regards

Mal

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mal - R69s
Toowoomba- Australia

Daves79x
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Joined: 08/09/2015
Posts: 304
Update

Just an update after putting on 125 miles: I've gotten the timing and carbs just about perfect now. Used the vacuum gauges that attach to the carb mouths - work great. My mixture screws gave the best idle at 2 1/4 turns out, surprisingly a bit leaner than standard. Plugs look great. Brakes are fantastic after Scottie worked his magic on the drums and relined front shoes.

Now for the probably boring part for most of you: I had 2 oil leaks that were driving me nuts, and they were actually one problem, sort of. I had what I felt was an unusual amount of oil dripping from the breather and also an ever-increasing amount of oil leaking from the bottom of the 'dry' front cover. Everyone said to just run the bike a few hundred miles and the breather will quit after ring seating. I really felt they were seated, with good compression and absolutely no smoke. Engine was bored first-over. So I looked for the front cover leak first. Thought for sure it was the cam seal, as oil was coming from right under the magneto frame. Easy job to change the seal, but it was not the seal. Dry as a bone there. Oil was coming from a factory-drilled/cast hole right under the magneto frame on the right side (looking from the front). The hole went through to the steel breather tube insert and turns out if I blew brake cleaner into the hole, it shot out the breather at the cam sprocket! So oil was not only running down inside the breather, it was migrating out that hole and making a mess. I removed the timing cover and sealed the passage with POR-15 gas tank sealer - this stuff works great for things like this too. I should say that this is a '59 and my '65 timing cover has no such hole. But I was still left with why was so much oil coming down the breather tube in the first place?

Well, some more investigation and a conversation with Richard at Vech's led me to solve the mystery. Here's what I found. The breather plate I have is the original single-pin style, fully intact with the correct backing washer and a new spring. New circlip also. Everything seemed in place and correct. I suggested to Richard that possibly the breather plate was not making correct contact with the timing cover and he said that could be my problem. Sure enough it was. Upon closer inspection, I found that quite a bit of material had been milled from the timing cover surface where the breather plate runs and the breather plate itself was not exactly flat. My hundred-plus miles of running only showed a faint ring of contact between the breather plate and the timing cover. So I worked the breather plate flat on a pane of glass and fashioned a way to mate the plate to the timing cover and work those two flat together. Then I luckily realized that with the circlip in place, holding the breather plate, the material milled from the cover, plus me flattening the surfaces, might result in very little if any contact between the two. I went to the trouble of bluing the breather plate, installing the timing cover and rotated the engine. Removing the cover showed very little scrubbing off of the bluing (actually magic marker, but bluing sounds more professional!). So now what? Later /2 engines don't have the circlip and I can now see why. Problem is, when you eliminate the circlip, it is a real pain to get the timing cover on and be sure the breather plate is positioned correctly. Took me about 2 hour of trial and error to get it. But investigation through the magneto seal hole (I left the seal out so I could jimmy the breather plate in place - the ONLY way I could see to do it) showed that indeed now the breather plate was farther out than the circlip would ever allow, and was now making good contact with the cover.

Bored yet? Anyway, after going through the whole magneto timing, static timing differential timing thing again (you remember I had it all just about perfect before!), I fired it up and went for a short ride. Then sat idling in the driveway whilst I checked the timing with the light. After all that - not a drop of oil anywhere! What an ordeal!

I searched all over here and found almost no reference to a problem like this, hence the long-winded explanation, in the hope that maybe it will be help to someone, somewhere, sometime.

So anyway, back to putting some more miles on the old girl and seeing what else comes up!

Dave

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Dave

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