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96 CR250 Barrel

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This topic contains 7 replies, has 0 voices, and was last updated by  Nathan Heather 11 years, 7 months ago.

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  • August 11, 2013 at 5:55 am #103123

    James Rookyard
    Member

    The piston has grabbed in the barrel of my old CR. It has already been bored out and an oversized piston fitted. It’s meant to have a Nicasil coated bore. Is it possible to either re-bore it further, or get a new sleeve or is a new barrel the way to go. Service Honda has them for $380ish on the net. Everywhere else lists them as obsolete.
    I am a 4 stroke bloke so not real clued up on old 2 strokes.

    August 13, 2013 at 8:23 am #247832

    Dean
    Member
    jimmy wrote:
    The piston has grabbed in the barrel of my old CR. It has already been bored out and an oversized piston fitted. It’s meant to have a Nicasil coated bore. Is it possible to either re-bore it further, or get a new sleeve or is a new barrel the way to go. Service Honda has them for $380ish on the net. Everywhere else lists them as obsolete.
    I am a 4 stroke bloke so not real clued up on old 2 strokes.

    Hey Jimmy $380 is cheap get 2 ! A nicasil bore will out perform a sleeve everyday of the week. Less heat sink into the barrel = better more consistent power over a longer period. And you dont have to rebore them ;)

    Ollie

    August 13, 2013 at 9:23 am #247946

    Nathan Heather
    Member

    Any idea why it locked it up? To lean or just well overdue for the slug and rings?

    August 13, 2013 at 10:07 am #247953

    James Rookyard
    Member

    As I said I am a 2 stroke novice. It had a new piston and rings about 5 hours ago. I was hooking up the road and dropped it back a gear and it just stopped firing. Didn’t lock up. It wasn’t till the barrel came off that you could see the damage. I thought it had put a hole in the piston, hence loss of compression.
    So guess it was running too lean.

    August 13, 2013 at 10:16 am #247833

    Harold Withington
    Member

    Got any pics of the barrel and piston
    Might be able to get a better idea on what happened

    August 13, 2013 at 10:23 am #247957

    James Rookyard
    Member

    Grab some tomorrow. Thanks.

    August 13, 2013 at 10:24 am #247962

    Nathan Heather
    Member

    And one of the spark plug. If you were wide open for a while perhaps thats why.

    August 25, 2013 at 11:07 pm #247834

    James Rookyard
    Member

    image-5.jpg

    image-4.jpg

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