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Ninja 250R Proddy Project

Discussion in 'Your 250cc Projects' started by Moo, May 16, 2014.

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  1. Revolver

    Revolver Big Member Premium Member

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    So what happened?
     
    Revolver, May 20, 2016
    #81
  2. Moo

    Moo Plodge Racing!!!

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    no update as of yet, life took over and proddie took a back seat. engines out but not looked at. hoping to get to it this week. i have about 4 weeks to get my **** together.
     
    Moo, May 23, 2016
    #82
  3. Moo

    Moo Plodge Racing!!!

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    So Motors out and heads off.......looks like she was running hot!

    nothing obvious around the head.....leading me more to think its a spun bearing. I've two bottom ends on offer and a full motor (just has a crack in the lower casing) on offer to me so i'm going to use them to make one.......and maybe a second in a while.....

    from looking at it i don't think this is the first time the heads been off?

    stay tuned.

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    Moo, Jun 2, 2016
    #83
  4. Moo

    Moo Plodge Racing!!!

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    so a little update, got a full engine with 1500 klms on it dropped to my door last night......only catch is that its come off a bike that t-boned a gets and has a small crack in the bottom casing. engine runs but weeps....

    Going to see if i can get it welded up rather than swapping over the bottom crank case from mine.......

    i'll keep you in the loop.
     
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    Moo, Jun 8, 2016
    #84
  5. Murdo

    Murdo The Good Doctor Staff Member Contributing Member Ride and Events Crew

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    You may not be able to just swap the bottom case as they are machined as a pair and fitting a different half may cause binding of the main bearings.
     
    Murdo, Jun 8, 2016
    #85
  6. Moo

    Moo Plodge Racing!!!

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    thanks for the info mate, didn't think or know that. i'm hoping that i may be able to get it welded.......

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    Moo, Jun 9, 2016
    #86
  7. Murdo

    Murdo The Good Doctor Staff Member Contributing Member Ride and Events Crew

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    I would be able to do that in situ. Just give it a good clean with thinners and grind a 'V' into the crack, warm the area with a heating torch (gas or oxy) to burn out any oil in the crack and weld whilst still hot. Wrap in an old blanket to allow it to cool slowly.
     
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    Murdo, Jun 9, 2016
    #87
  8. Moo

    Moo Plodge Racing!!!

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    Murdo you beaut! i'll start the prep work tonight and see if i can get one of the guys to do the welding.....mig i'm guessing?
     
    Moo, Jun 9, 2016
    #88
  9. Murdo

    Murdo The Good Doctor Staff Member Contributing Member Ride and Events Crew

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    MIG would be okay, but with a TIG you will be able to keep the heat in one spot to burn out any contaminates that might bubble to the surface before adding the filler rod.
     
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    Murdo, Jun 9, 2016
    #89
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