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What have you done to your XS today?

Discussion in 'The Garage' started by I am Carbon, Nov 24, 2013.

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  1. GLJ

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

    :(
    Pics?
     
    Mailman, Paul Sutton and gggGary like this.
  2. azman857

    azman857 '80 XS 650SG Rider XS650.com Supporter Top Contributor

    Yeaaaahhhh . I should take some in progress shots...
     
    Mailman, GLJ, Paul Sutton and 2 others like this.
  3. Very pretty, how do you like that seat? Saw them online, just wondering.
     
    Mailman likes this.
  4. Mailman

    Mailman Hardly a Guru Top Contributor

    I somehow missed this when you posted it, that rotor looks super! I do not understand why nobody wants to turn motorcycle rotors. I remember years ago calling around trying to find someone. Anyways yours looks better than new! I hope you got your oil leak stopped, and how the heck did you get your bike up on those scary milk crates? :yikes: I’d knock that over for sure. I’m surprised you don’t have a Harbor Freight Motorcycle jack , so you can strap that puppy down.
    0D1BD1E6-ED4A-4857-921E-1F4E436B9109.jpeg
     
    TwoManyXS1Bs, YamadudeXS650C and Jim like this.
  5. jetmechmarty

    jetmechmarty What should I put here? XS650.com Supporter Top Contributor

    I believe the requirement for our rotors is a Blanchard surface grinder. If you do a search for Blanchard Grinding, you will find the service more readily.
     
  6. YamadudeXS650C

    YamadudeXS650C Central New York XS650 XS650.com Supporter Top Contributor

    Yes, TrueDisk used a surface grinder. I believe that the steel in these rotors is closer to stainless, which makes turning them unworkable.

    Marty, I'll try your search terms today and see what I get locally.

    Bob, I've got a couple motorcycle jacks which have their purposes, but I use an electric ceiling-mounted winch to raise the bikes (even the FJR1300) up to the milk crates. Its makes for a surprisingly stable platform, and I keep the lifting straps connected to the winch just in case of some sort of freak accident or earthquake.
     
    TwoManyXS1Bs, Marlin72xs and Mailman like this.
  7. Machine

    Machine Race the wind Top Contributor

    :whistle: Dang it, helpful opinions welcome here, on this lathe turning rotor plan.. See as a favor I stepped in to assist another member in attempt to turn a 76 rotor.
    So I made a mandrel, loaded and faced the mandrel. Checked fit on the lathe bed. Thought too long and left it there over night awhile back. Monday morning my shop manager threw a small fit telling me to pull my motorcycle parts out of sight. After hours only :(
    Boss claims that using a single tip facing tool cutting one face at a time will make too much noise, chatter and ruin the disc :umm:
    Well, I just can't stand being told what I cannot do (red head) and am waiting for opportunity while considering the process.
    Very slow rpm seems like a win but.. I sure would feel bad to fail. Anybody experienced this? -R
     

    Attached Files:

  8. YamadudeXS650C

    YamadudeXS650C Central New York XS650 XS650.com Supporter Top Contributor

    Keith, Its a firm seat, but I've found it to be comfy. However, this bike is not one that I ride long distances, so I don't have a 2-hour road test of it.

    The hump is located the same distance from the tank as the bump on the '83 seat.
    I noticed that some aftermarket humps are located further back.

    2019.Calendar76.InnerCity.seat.jpg
     
  9. Mailman

    Mailman Hardly a Guru Top Contributor

    A shade tree engineering method:
    I just remembered something RetiredGentleman told me once, he said he surfaced a disc by mounting the disc to a drill press and laying a flat file across it. He said it worked well. :shrug:

    Marty, I’m going to look into that Blanchard grinding. :thumbsup:
     
    YamadudeXS650C likes this.
  10. Jim

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

    Way back when I lived in Florida, me and a buddy tried turning the rotors on our RD350's. Don't recall what lathe he had, but it was a nice, big one. We weren't pro's like you, but we couldn't stop the chatter. Ruined one disk.. gave up... went to a brake shop that had a proper grinder. Good luck.
     
    Marlin72xs, gggGary, Mailman and 2 others like this.
  11. YamadudeXS650C

    YamadudeXS650C Central New York XS650 XS650.com Supporter Top Contributor

    You brought back some old memories; I successfully used the large flat mill bastard file method on my RX7 and 350Z brake discs years ago; I would do them once a year to keep up with the grooves. The steel was soft enough that the process was pretty easy.
     
    Marlin72xs, Mailman and Jim like this.
  12. GLJ

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

    He might be right. When I used to turn automotive rotors both sides were cut at the same time. Also a rubber belt with weights was wrapped around it to stop the chattering.
    I'm not a machinist, I would guess high speed may be better than low speed for cutting. Sometimes you just have to try different different things and see what works. Good lucks!
     
  13. Machine

    Machine Race the wind Top Contributor

    Suppose its time to ask the disc owner (blue 76:cool: ) just how accountable I am for good results :lmao:
    The "open" lathe keeps staring at me now.
    Was advised to make a twin cutting tool but jeez, thats a whole nutter ball game. Thank You, XSperts for the replies!
    00433578.jpg
     
  14. yamahama

    yamahama '72 XS in Restoration XS650.com Supporter

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    My name is Yamahama and I've done nothing for a while...:thumbsdown:. I guess my lazy bones machinist finished my engine work a month and ago after having it for 2 months and I have not touched the bike since. Guess I caught his laziness. But, just got a text from my painter...candy color done needs sanding and clear. Everything else is here except doing reassembly..some polishing/sanding aluminum..odds n ends. Better get with it. The end is near, cooler weather (less rain) is coming. Today, I found some photos of my old bike in 1978! I saw one for sale a few weeks ago supposedly low miles and it had just sold in state here...Craigslist . I think I would have grabbed a truck and got it.. PA210972.JPG I best just get off my ass.
     
  15. I'm only an amateur machinist, son of a "Tool and Die" engineer who worked for Bendix Aviation from 1940 to 1982. I wish I had 1/10th of the knowledge that he took to his grave. Well, my son thinks I'm smart anyway.

    Right, ok, after drilling some holes in my disk, I found that this steel is not too hard. In fact I drilled 20 holes with the same drill bit. Perhaps the chattering is coming from the extreme hardness of the heat and glazing affect. What if you tried sanding off the hard glazing first, then finishing it with a cutting tool?

    image.jpeg
    As you can see, I'm in need of some turning. With some advice from you guys, I called the guy who did my valves, and no go. Then I called the local bike shop, and they said that they just replace them. I'm afraid to try Advance or Autozone.
     
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  16. WideAWAKE

    WideAWAKE Single Fins and Twin Cylinders

    A Blanchard is perfected method.

    BUT they certainly can be turned on a lathe.

    call Chris at Schumann motor works. I believe he will turn them. Great guy. Very reasonable pricing as well.
     
  17. gggGary

    gggGary I'm listening, change my mind XS650.com Supporter Top Contributor

    Turning zooky rotors to fit my xs rear caliper I had "no" problem reducing the OD using Carbide. Even with ear muffs it was painful loud squealing. Trying to reduce rotor thickness I had drilled the rotor and then turning it down for thickness was a no go, shock from crossing the drilled holes was just too much.. Yes DIY grinding is prolly the way to go. a flap disc on an angle grinder held against a spinning rotor has stood the test of use on five or more rotors for me. Several others here have also done this, been satisfied with results removing the inner and outer ridge and grooves.
     
  18. ThatXS650Guy

    ThatXS650Guy More Sparky than Speed Racer XS650.com Supporter Top Contributor

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    Bite the bullet and send them to Tru Disk. He's a good guy and supports the hobby. My GPz rotors came out perfect.
     
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  19. Jim

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

    All 3 on the SG were done that way. They all still run true with no brake chatter. Count me as satisfied with that method too.
     
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  20. jetmechmarty

    jetmechmarty What should I put here? XS650.com Supporter Top Contributor

    My inclination is to buy a new rotor that weighs less than the original. If you have a show bike, I understand you can't do that.
     

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