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Can this motor be saved....

Discussion in 'The Garage' started by mjamusic, Dec 2, 2019.

  1. mjamusic

    mjamusic XS650 Enthusiast

    So I recently picked up a 75’ “project” and everything was looking good until I discovered this... 5A5B20C0-C42D-4116-BCFC-8A7D54C2B190.jpeg D0EA3D90-5D3A-4E99-B359-362D529D2695.jpeg so my question is this.... based on the rust on the crank and all the debris should I continue to try and flush this stuff out? do I have to split the cases? Is the rust a deal breaker? Thanks for your input!
  2. Machine

    Machine Race the wind Top Contributor

    Bugs ! ? Lol are those bugs ? I don't see a whole lot of rust.
    How many miles are on that engine? What do the jugs and rods up top and head look like ?
    Maybe there is hope
  3. mjamusic

    mjamusic XS650 Enthusiast

    Yup, bugs! Also there is mouse nest material that I am still trying to get out. miles are unknown unfortunately. The jugs are pretty rusty and so is the head so I was planning on getting a different top end, I was just hoping the bottom end was in better condition and that I don’t have to split the cases.
    wrenchjohns and gggGary like this.
  4. gggGary

    gggGary Stop that! XS650.com Supporter Top Contributor

    I see a couple ladybugs but mostly ants? Bizzarre!
    Well if the trany's like that, yeah your going to want to get all that detritus out of there.
    wrenchjohns likes this.
  5. mjamusic

    mjamusic XS650 Enthusiast

    Gary, is the rust on the crank a concern or can I proceed with flushing out the bottom end? I was planning on using mineral spirits.
    Machine likes this.
  6. gggGary

    gggGary Stop that! XS650.com Supporter Top Contributor

    Rust on the crank weights no big deal kinda common actually, rust on bearing races would be dicy. Start by vacuuming out as much as you can? My thoughts when I have a mess; stopping it from spreading is number 1
  7. lidirtrider

    lidirtrider XS650 Addict

    whats the rest of the bike look like? where'd you score it? I'm down in Long Island, a little ways from Syracuse, but I split my time down here and in the Catskills.
  8. mjamusic

    mjamusic XS650 Enthusiast

    Everything else looks good, just typical dirt and grime from sitting for a long time. It was a Craigslist score.
    gggGary and lidirtrider like this.
  9. Bushyeyed1

    Bushyeyed1 Cafe Racer XS650.com Supporter Top Contributor

    I wouldn’t count it out as being done. There are plenty of used engine parts on eBay or this forum if something is busted. Clean it out and see if it shifts through gears and has compression before tearing it completely apart. At least then you will have an idea the transmission isn’t ceased or you need a top end rebuild.
  10. mjamusic

    mjamusic XS650 Enthusiast

    I think that’s a good call! Thanks for the vote of confidence I really want to bring this bike back to life!
    Bushyeyed1 likes this.
  11. GLJ

    GLJ Never go faster than your guardian angle can fly. Top Contributor

    Do you have the head off? The cam chain looks funky.
    Mailman likes this.
  12. mjamusic

    mjamusic XS650 Enthusiast

    Yes. The whole top end is off and the chain is zip tied.
    gggGary and GLJ like this.
  13. lakeview

    lakeview XS650 Guru XS650.com Supporter Top Contributor

    Once the motor is opened up, you have a whole new set of questions - how far do ya go?
  14. mjamusic

    mjamusic XS650 Enthusiast

    Very true! I’m going to do my best to flush the bottom end and not split the cases. The top end will get a whole new 700cc setup!
    Bushyeyed1 likes this.
  15. halfmile

    halfmile XS Builder XS650.com Supporter Top Contributor

    IMHO I wouldn`t spring for a good 700 kit unless I split the cases first and really knew what I had. You won`t get a complete cleaning just by flushing the bottom end. Probably won`t even clean the crank bearings and from the pics the trans surely needs to be inspected. I`d say flushing the bottom end is just the tip of the iceburg. Just my thoughts. Good luck with your project and lots of good info here on this site.:twocents:
  16. Gator xs2

    Gator xs2 XS650 Addict

    Anything can be saved. The question is. Are you willing to spend the time and money to save it? And I’m with half mile. You gotta start with empty cases.
  17. My recent acquisition was butt ugly on the outside and I removed the engine to check it out, I did split the cases after taking the top end off because, with the engine out and the top end off there's little to beyond time spent to lose but much to gain. Splitting the cases is not a scary thing, just go at it placing one foot before the other. There IS a massive amount of information and the answers to most any question you may have on this forum.
  18. Gator xs2

    Gator xs2 XS650 Addict

    The thing about a rebuild is that if it’s not yours and you have no idea about previous ownership. You have assume the worst and hope for the best. Long story short. Get in there.
  19. jetmechmarty

    jetmechmarty XS650 Guru Top Contributor

    :agree: You already spent the money. You're committed. Don't go half way.
  20. XSLeo

    XSLeo XS650 Guru Top Contributor

    With the head off It's not hard to split the cases. Turn it upside down in a milk crate. Then you can lift the lower case up off the rest.
    Then you can get a good look inside. From what I can see of the inside from here it don't look impossible.
    Once the lower case is off you can lift out the crank and transmission. Clean them off, inspect the bearings. The book tells how to.
    Once you get them clean a coat of oil can help prevent rust till you get things back together.
    You can get complete engines for not a bad price, then you have to believe what the seller has to say.
    I might even do that till you get this engine up to snuff.

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