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Engine

Engine Related
499 Topics 4.9k Posts
  • DTR Water Pump SVG

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  • DTR Transmission SVG

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  • DTR Tachometer SVG

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  • DTR Starter SVG

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  • DTR Shift Shaft SVG

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  • DTR Shift Cam SVG

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  • DTR Radiator SVG

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  • DTR Oil Pump SVG

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  • DTR Generator SVG

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  • DTR Crank/Piston SVG

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  • DTR Crankcase Cover SVG

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  • DTR Crankcase SVG

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  • DTR Clutch SVG

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  • DTR Carburettor SVG

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  • Gearbox Bearings

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  • Bogging

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    CalumC

    @Vcelicka Probably! But the effect it had on a previous bike was dramatic!

  • engine piston check

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    S

    @Hark_Ptooie

    Kinda pisses you off when your recently ‘rebored’ piston used to rattle back and forwards in the barrel, doesn’t it?! I had the same experience buying a REBORED barrel & piston.
    I’m very particular about who does my rebores now…

  • How long does a piston last, really?

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    CalumC

    Classic, well they say nothing last forever.

    I'd change it at the recommend service interval, if nothing else, restores lost power.

    Did you see my Cagiva Raptor. Nothing wrong with that engine on the face of it. Started on the button and ran really well. Last year I decided to do the service interval.

    Turned out the piston had a hairline crack in on top of the piston crown and down the gudgeon locator...ticking time bomb.

    I had a barrel replated, new piston/rings and the bike was utterly night and day in terms of performance. The thing absolutely flew.

    Then a few weeks later it was really struggling to run. I went on an overseas trip and came back when the temperature had drops some, then the engine just died.

    I haven't stripped it enough to figure it out yet, but at 30 PSI, prognosis is not good. I whipped the cylinder head off and the piston/bore are in good shape. My guess is the crankshaft seals have given up. The restored new power was just too much for them and they've let go.

    Another one for another time

  • DTR Reed / V force comparisons

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    HOTSHOT IIIH

    @Stevie-Wonder They're ace, they'll sell you a GPX TSE250R engine which bolts straight in, and other stuff like a cone-shaped shim which fits on a DTR crankshaft under the flywheel to enable running it in a DTRe bottom end.

  • Enlarged manifold for bigger carbs

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    CalumC

    Oh that's cool, though my brother ran a 38mm Keihin on his 2001 DTR. Just heated up the rubber and stretched it over.

    https://www.youtube.com/shorts/bOGAEzTaBgI