What type of weird sound do you hear...
This might be a stupid question has it enough fuel, did you touch the carb settings? Check your lines to your carbie, check your spark plug see what the colour it is, should be a darkish brownish colour maybe replace it.you said low end is fine are you talking on idle its fine? Or when your going slow no weird sound? Can you take a video of what it's doing? Could be a clutch failure. Is hard to diagnose on your comments.
Cheers
This might be a stupid question has it enough fuel, did you touch the carb settings? Check your lines to your carbie, check your spark plug see what the colour it is, should be a darkish brownish colour maybe replace it.you said low end is fine are you talking on idle its fine? Or when your going slow no weird sound? Can you take a video of what it's doing? Could be a clutch failure. Is hard to diagnose on your comments.
Cheers