great thought didn't think of that could be something in the needle valve. got too cold around here lately. will try soon. does not die out just can't go higher than maybe 2k.
will check pipe. pulled the line at the carb. flows fast. drained smelly fuel again and trid fresh ng. bought a coil and cdi box . will try this week end. thanks for the help.
ran like a beast. sat for a couple of years. New cheap petcock, tank wash and cheap carb. bogs half throttle. 300.00 factory carb and the same. moved the needle no help. all new vent lines and battery. wouldn't think yhe timing should change.