Engine Trouble First Start! And then no run....

Discussion in '2-Stroke Engines' started by bonsaiisuperstar, Jul 14, 2012.

  1. bonsaiisuperstar

    bonsaiisuperstar New Member


    (Click the attachments to see pics of the bike)

    After spending the last few months lurking these forums and building my own bike it's time to start riding. Rock Solid Engines 80cc stage 3 engine - first heat cycle. The engine fired right up and ran well for about 4 minutes. I drove down the road (it's fast!), turned around and started coming back and it bogged and stalled. I used the pedals the rest of the way. I let it sit for a few minutes and tried it again. It started quickly and it ran well again for about 3 minutes, then bogged and stalled. Seems like a fuel delivery issue but I'll try to diagnose that tomorrow as i'm tired from working all day. I'm just happy that it runs and the bike seems to go well when it's running.

    What do you think? Of the stalling issue and of the bike itself. (first timer)
    Last edited: Jul 14, 2012

  2. Al.Fisherman

    Al.Fisherman Active Member

    Make sure that the fuel cap is vented. When starting it up and when its running, remove the fuel cap and see if that solves your problem. Make sure the fuel is flowing into the carburetor.
  3. bonsaiisuperstar

    bonsaiisuperstar New Member

    Thanks Al! It was a combination of the tank not venting properly and having tiny metal shavings from the machining process gather at the on / off valve in the tank and slowing the fuel flow. It runs like a champ now! Did it's first 10 minute heat cycle last evening. It's Fast! Much faster than i expected, so much that i may have to upgrade the brakes.