When I pull full throttle, my Puch used to bog down (engine sound dropped & speed... four stroking, I believe).
I adjusted the needle and I can go full throttle now. Though now I have a whole new sound to deal with. Now when going full throttle, I hear this loud clanking sound. Kind of high pitch... also, I can feel my bike slowing down. It almost seems that the piston can't keep up or something. Kind of the same sound you hear when you're hauling ass & just let off the throttle..
When I let on and off the gas, the sound will go away (smooth ride).. but not always.
Is this a sign of it running too lean on the top end?
I have a Puch MKII sport (2 speed). Proma GP pipe & high air filter.
12mm bing w 58 jet. My neelde is in the 2nd or 3rd position... forgot which.