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Crabby's Build

Discussion in 'The Garage' started by CrabbyCustoms, Jan 7, 2020.

  1. CrabbyCustoms

    CrabbyCustoms XS650 Enthusiast XS650.com Supporter

    Wow Jim that is an amazing post. Thanks, that is definitely an option. I'll see what the other cylinders look like.
     
    gggGary and Jim like this.
  2. 59Tebo

    59Tebo 59Tebo Top Contributor

    People part these motors out all the time, for a song, because one side is roached. One good sleeve + one good sleeve = one good motor. You can make yours last forever! :rock:
     
    Raymond and Jim like this.
  3. CrabbyCustoms

    CrabbyCustoms XS650 Enthusiast XS650.com Supporter

    I've been waiting for a friend to help me lift the 2nd motor into the stand. In the meantime I built a water separator for my compressor using copper pipe. My compressor is too small to media blast for long periods of time, it was creating too much condensation, seems to be working well now February 06, 2020-23.jpg .

    I've also blasted a few parts to try and figure out the best method. For the cylinders I think Glass Bead #70 leaves a nice clean, slightly shiny surface. I also did a rear brake plate. I first cleaned the brake plate with a 3M cleaning wheel on my bench grinder and it gave a beautiful shiny surface but it had fine scratches all over so I then Glass bead blasted 1/2 the surface which removed the scratches but also dulled the sheen. I'm going to polish it on a wheel and see which half looks best.
    February 06, 2020-27.jpg

    I managed to squeeze the handle bar mounts together and get them through the bushings using a vise.

    February 10, 2020-49.jpg February 10, 2020-56.jpg

    Got a new tire and it fit's almost perfectly under the rear fender. I need to figure out a way to get it pushed over by a few mm? Would I put in a spacer?

    February 10, 2020-40.jpg February 10, 2020-45.jpg February 10, 2020-42.jpg

    Thanks, Marc.
     
  4. TwoManyXS1Bs

    TwoManyXS1Bs BBQ Hunter Top Contributor

    Of paramount importance is the lateral alignment of the front and rear sprockets.
    Next is ensuring clearances of wheel and drivechain to structural/suspension components.
    Last is body fitments, like fender, sissybar, seat...
     
  5. CrabbyCustoms

    CrabbyCustoms XS650 Enthusiast XS650.com Supporter

    Cracked into the backup motor today. It's in much rougher shape than the first.

    February 13, 2020-46.jpg
    February 16, 2020-52.jpg February 16, 2020-62.jpg
    Serious corrosion outside. The inside of the sleeve feels nice and smooth but it's discolored.
    February 16, 2020-67.jpg
    February 16, 2020-71.jpg February 16, 2020-78.jpg

    Would honing them be good enough or do they need to be machined?

    The rocker seats have some discoloration and what looks like some wear but they feel really smooth?
    February 16, 2020-83.jpg

    This cam seems much better than the other, some discoloration but the surface is smooth. Can it be used?
    February 16, 2020-92.jpg February 16, 2020-93.jpg

    Thanks!
     

    Attached Files:

  6. Machine

    Machine Race the wind Top Contributor

    The Camshaft lobes look really good. Rocker pads look goood.
    Even the bore looks good.
    Piston Domes ? Yuk..
    :umm:
     
    Raymond, CrabbyCustoms and Jim like this.
  7. Jim

    Jim Beyond the edge is the unknown. Here be Dragons XS650.com Supporter Top Contributor

    Yeah... I'd use that cam and rockers. Jugs too. The little bit of pitting I see is below the ring travel. As long as the upper part looks good, hone 'em and see if they're in spec. If they are, use 'em.
     
  8. 59Tebo

    59Tebo 59Tebo Top Contributor

    (IMHO) I'd say that backup motor looks perfectly rebuildable. Those pistons probably have a lot of life left in them, after a good scrubbing. A perfect motor? Maybe not. But a good usable motor? Absolutely! Go for it! :thumbsup:
     
    Raymond, CrabbyCustoms and Jim like this.
  9. CrabbyCustoms

    CrabbyCustoms XS650 Enthusiast XS650.com Supporter

    That's great news! Thanks!
    I do have about a 1/4 inch of carbon build up on the top both sleeves, I could use baking soda and blast it off?
    February 17, 2020-47.jpg
     
  10. Jim

    Jim Beyond the edge is the unknown. Here be Dragons XS650.com Supporter Top Contributor

    Soda blasting sounds mild enough to me, but I haven't really read much about it. I usually just use a scraper made from aluminum sheet to get the worst of it off.
     
    TwoManyXS1Bs, Raymond, 59Tebo and 3 others like this.
  11. Raymond

    Raymond XS650 rider, fettler, setting out on a journey XS650.com Supporter Top Contributor

    FWIW, I agree with the above - that motor looks dirty on the outside but good on the inside. You can even see the original honing marks on the lower part of the bores.

    I've got a guy a few miles away who does aqua blasting - that would soon clean up the corrosion on the cylinder block and head without any risk of damage. Other than that, you could soak with paraffin or Gunk and clean a lot of it off with a hose and a dish brush.
     
    Jim, CrabbyCustoms and 59Tebo like this.
  12. CrabbyCustoms

    CrabbyCustoms XS650 Enthusiast XS650.com Supporter

    Thanks Raymondo, I'm actually going to try to clean it with Glass Bead Blasting today.
     
    Jim and Raymond like this.
  13. 59Tebo

    59Tebo 59Tebo Top Contributor

    Hi Crabby! If you're set up to do your own soda blasting, great! That oughta scrub that motor nicely. Just remember to do several hot water rinses as soon as you're done blasting. That stuff gets everywhere, and (mildly) corrosive, but dissolves pretty easily in water. Rinse, blow dry (compressed air gun) and repeat. Steel parts should get a little wipe with an oily shop rag (just a little coating) of oil to prevent surface rust, but your results should be amazing!
     
    Raymond and Jim like this.
  14. Machine

    Machine Race the wind Top Contributor

    Be careful glass beading. I've found that perhaps due to awkwardness of holding a part inside the cabinet with bulky rubber gloves, looking through a dusty window, and working the gun, it is tempting to over shoot.
    And don't drop a piston in there either unless you're ready to cuss.
    I'd first try just a wire wheel or brush ?
     

    Attached Files:

  15. CrabbyCustoms

    CrabbyCustoms XS650 Enthusiast XS650.com Supporter

    Wow a bit of a rollercoaster of emotions! I started this morning by ultrasonic cleaning the cylinder which did a great job of removing the filth and left a nice even finish. Then I used glass bead #7 (medium) on it but it wasn't enough to cut through the corrosion so I then used glass abrasive #75 (medium) which did an amazing job, it gave a bright matt finish.

    February 17, 2020-46.jpg

    Then I went over it again with the glass bead which gave it a really nice sheen but a darker finish. On the bottom photo the left half is abrasive and bead and the right half is just abrasive.
    February 17, 2020-52.jpg
    Below is before and after.

    February 16, 2020-62.jpg February 18, 2020-42.jpg
    I soda blasted the line of carbon on the inside, it seemed to come off nicely.
    February 17, 2020-47.jpg February 18, 2020-43.jpg
    I was pretty excited with the results but then I put in back in the ultrasonic to clean the media out and it turned the aluminum a blotchy black!

    A lot of work for nothing.
     
  16. CrabbyCustoms

    CrabbyCustoms XS650 Enthusiast XS650.com Supporter

    It even seemed to bring back some of the corrosion?
    February 18, 2020-44.jpg
    February 18, 2020-46.jpg
     
  17. Jim

    Jim Beyond the edge is the unknown. Here be Dragons XS650.com Supporter Top Contributor

    Blast it again to get the brightness back then wash with dish soap and HOT water. Do a final rinse... or 3 or 5 with boiling water. Yes boiling hot. Dry immediately and coat the steel with oil.That's the Lycoming recommended procedure from my airplane days...
     
  18. CrabbyCustoms

    CrabbyCustoms XS650 Enthusiast XS650.com Supporter

    I will. Thanks!
     
    Raymond and Jim like this.
  19. CrabbyCustoms

    CrabbyCustoms XS650 Enthusiast XS650.com Supporter

    I removed the pistons and cleaned them with soda, they appear to be in pretty good shape. When I removed the circlips one of them shot out and I searched the ground with no luck, later on I realized that it had fallen into the crankcase! fished it out with a magnet.
    February 20, 2020-51.jpg February 18, 2020-44.jpg
    I removed the valves from this engine just to see what condition they were in? I was thinking that I would use the top cylinder from the first engine since the valves had already been done but once I removed them I decided to clean them and they look pretty good but there is some pitting on the valve surface.
    February 21, 2020-48.jpg February 21, 2020-50.jpg
    February 21, 2020-60-2.jpg February 21, 2020-65-2.jpg I wrapped electrical tape around the stem and put them in a drill and using a super fine 3M pad and WD-40 I removed most of the carbon. Then I used 800 and 1500 grit wet sandpaper. Screen Shot 2020-02-23 at 4.14.10 PM.png
    I also disassembled the front brake caliper but I have to figure out a way to get the piston out? it's rusted solid.
    February 21, 2020-42.jpg
    I soda blasted the first cam shaft that was coated in rust was just curious how well it would work.
    February 20, 2020-49.jpg February 20, 2020-48.jpg February 20, 2020-44.jpg
     

    Attached Files:

    LanzSilva, Mailman, Raymond and 2 others like this.
  20. 59Tebo

    59Tebo 59Tebo Top Contributor

    That's some pretty good results all around! For somebody who does re-grinding, where they build it up, re-grind (hi-lift or re-phase), and re-plate, that cam would be a good candidate. For that "stuck" brake caliper, you could try replacing the bleeder with a grease fitting and pumping it out with a grease gun. I haven't tried that myself, but heard it works on stubborn pistons. :twocents:
     
    Raymond, CrabbyCustoms and Jim like this.

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