• Anyone put a big bore kit in their bike

    Anyone put a "big bore kit" in their bike.

    Thoughts.

    Comments.

    Good or bad.

    What other mods did you do at the same time.

    Seized my motor. Considering going all the way.

    14 comments
    • Ive got a 55mm piston kit from Warrick Penfold and with an exhaust, big carby and a little head work im making nearly double a standard postie on the dyno. bottom end is still stock

    • Sweeeeeet

    • The pict says it all!

    • How are the engine mounts holding up?? mine ripped twice with postie delivery.

    • Same here. Warrick Penfold 55mm piston kit, 26mm carby- manifold to suit, ported head, standard cam, custom exhaust. I'm a lean 120kg and it goes great. Holds it up hills now. Pulls in every gear. No horse power result yet. Dyno soon. Happy as.

    • Hayden Bond Bradley Lambkin what jetting are you running in the 26mm?

    • Straight out of the box. Main 95. Might look at experimenting to bigger mains after talking to some other postie riders. I run 16/45 sprockets.

    • 55mm so.. thats a 120cc set or?

    • 117

    • You can pick up 140cc pit bike engines for around 500 that's another option

    • Don't want no Chinese pit shit.

      Jap Jap all the way.

    • How much was the head ported?? Did you take any pictures, just about to do my spare head

    • they are fine, never had a problem

    • im running a 24mm carby with stock jets