Another R80gls build, just slower

Discussion in 'Airheads' started by Ghilli, Sep 20, 2012.

  1. Ghilli

    Ghilli super n00b

    Joined:
    Sep 20, 2012
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    The disc is a bit of an experiment, I got the front hub ceramic coated and coated the disc with VHT engine enamel. The idea is to see how they handle all that brake dust, some brake fluid and road conditions and compare the coatings next to each other.

    This is the renevation and DIY spraying of the disc.

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    Just cleaned

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    And the painted hub

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    Ceramic coated hub.

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    And here are some more parts I got coated.

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    #21
  2. Ghilli

    Ghilli super n00b

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    Painting the engine scared me a bit, but living near the coast and seeing how things corrode as you wach made me do it with a smile.

    I masked off the areas not to be painted and prepped the parts for painting, it looks pretty nice, I hope I did the curing process properly.

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    I baked it a few times, in a box, and it seemed to be working.

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    Most of the painted parts were only on the outside surface.

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    And this is where I am now, a lot of work and really not much to show for it. :D

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    #22
  3. Rucksta

    Rucksta SS Blowhard

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    What is the heat disapating ceramic coating?
    The only ceramics I have any experience with are in exhaust coating and increase the exhaust velocity by retaining the heat.
    Is that the bake temperature showing on the dial thermometer?
    #23
  4. Ghilli

    Ghilli super n00b

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    It is a coating that helps with heat transfer where the other type ceramic coating reduces heat transfer, I made pretty sure of this because I don't want to trap heat in the barrel and "lock" the heat inside. That is the bake temperature I baked at when I was curing the engine enamel. The instructions on the can said 93C, but I made it a little more to be safe.
    #24
  5. Ghilli

    Ghilli super n00b

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    Soooo, I realized that there's a difference between the stud bolts that goes into the engine for the barrels. 6 of them are the same and then there is two odd ones.

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    I did not pay attention at all when I was taking it apart and did not see where they came out off. If I had to guess, they fit into the two rear holes on the right hand side of the engine, that's the two in the left of the picture with the deep thread?

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    #25
  6. Airhead Wrangler

    Airhead Wrangler Long timer

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    "You are correct, sir!"

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    #26
  7. Ghilli

    Ghilli super n00b

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    These came out of the engine and are going straight back in, they look fine? Measured it and got 21.955mm, should be 22.025ish. But I seriously doubt my measured accuracy.

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    #27
  8. Ghilli

    Ghilli super n00b

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    Used some general purpose gasket loctite for these, I want to seal them as good as possible. They were quite dirty when I took them off and its really difficult to clean there.

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    Using an oven, mallet and freezer for building a bike is definitely a first.
    #28
  9. Ghilli

    Ghilli super n00b

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    I took the forks apart and the oil in the left tube looked like, uhm....

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    This cant be good, I guess there was a fair amount of water in that tube. Everything is stripped now, but I can figure out if the bottom of the slider that is kept in place with a cir-clip can or should come out.
    #29
  10. Solo Lobo

    Solo Lobo airhead or nothing

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    Yes, early 81's internals look like this:

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    #30
  11. Ghilli

    Ghilli super n00b

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    Ok, I need some advice here please.:lol3
    The old conrod bearings are not the same as the new ones in this picture.

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    The old one has a hole in the top and is not split like this one. The part nr is the same and I pressed them in with the slot facing the hole in the conrod. But now the piston pin seems like it needs to be pressed in aswell wich cant be right? It feels too tight.

    Also, I weighed the lot separately to split the parts in two to try and equal the weight of the piston-conrod assembly, is this a waste of time?

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    #31
  12. Beemerguru

    Beemerguru Beemerguru...G/S guy

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    The wear limit number is cast into the hub..look to something like 11.XX" and measure yours.

    Greg
    #32