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This topic contains 1 reply, has 1 voice, and was last updated by  Ian Krueger 1 year, 7 months ago.

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  • #74320

    Ian Krueger


    I have a PRD engine, 100cc air-cooled, not sure the exact model or year.

    Does anyone know if these things are close in class to an HPV or KPV? all’s I know is it has a Yamaha crankshaft, because it has that taper and we used to run it in piston port sprint a while back. I’ve never take it apart because it still runs fine mechanically.

    I’m trying to build a dual engine laydown , piston port, and I’m trying to figure out if it’s close to a Piston Valve motor?


    Any info is greatly appreciated, thanks! -Ian

    WKA sprint

  • #74369

    Ian Krueger

    Update: it’s an RK100 , anniversary edition. Got a square exhaust outlet (rectangle I should say) and we ran the WB3 carb same as the yamahas

    WKA sprint

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