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xj 650 cylinder wall gouges question

Discussion in 'XJ Modifications' started by wreck1819, Apr 24, 2013.

  1. wreck1819

    wreck1819 New Member

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    So I picked up a 1981 xj 650 h for a project I planned on turning into a cafe racer. After getting into the engine I noticed there was some surface rust on some components but as I was about to start honing the cylinder walls i noticed some gouges on one of them.

    [​IMG]

    My question, If I hone it a bit will it still be run-able. Or is it shot in this condition and need to be bored to the next .25 spec. Keep in mind I'm a broke as sh!t college student paying hospital bills, so my budget is tiny to say the least...

    Thanks John
     
    wreck1819, Apr 24, 2013
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  2. wizard

    wizard Active Member

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    Hi John, honing will not help, take the block to a machine shop, they can measure the depth of the grooves, they look to deep to rebore. Maybe you can find a cheap, low mileage block.
     
    wizard, Apr 25, 2013
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  3. Orange-n-Black

    Orange-n-Black Well-Known Member

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    Search ebay for some jugs and switch them out along with some new rings.
     
    Orange-n-Black, Apr 25, 2013
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  4. 750E-II_29Rbloke

    750E-II_29Rbloke Active Member

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    They're nasty :( they look at *least* half a mil deep from the pic (so would need minimum 1mm rebore & may still not go)

    I'd look for a set of barrels/jugs as suggested. I'm wondering how it happened, broken rings? looks off axis to be a loose pin...
     
    750E-II_29Rbloke, Apr 25, 2013
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  5. wreck1819

    wreck1819 New Member

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    I have no idea how it had happened. The rings are fine the pins are fine i cant seem to find anything wrong. this is cylinder three, cylinder two was the one I imagined having problems with since it was rusted up seizing the engine, but it cleaned up fine. Damn...
     
    wreck1819, Apr 25, 2013
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  6. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    My WAG: some PO replaced the rings after experiencing a ring failure on that cylinder (cause of the gouging) and figured that he'd just live with the oil consumption for the time being.

    WAG #2: A PO who was "good with bikes" attempted to "drill out" the crankshaft by way of the spark plug hole.
     
    k-moe, Apr 25, 2013
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  7. 750E-II_29Rbloke

    750E-II_29Rbloke Active Member

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    What stevo sold his bike on already? :D hahaha sorry bit of an in-joke...

    Actually, my money is now on somebody was changing a shim without the proper tools and "lost" the end of their wire they were holding a valve with... several times... and figured "what the heck it's only copper, it'll just squash out the way" :roll:
     
    750E-II_29Rbloke, Apr 25, 2013
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