u put on a more restrictive air cleaner didn't u bob ? using the STOCK cleaner and having spun it around into the airflow to create a makeshift "airram" is how I consistently run 65 on the highway (Ive pegged 80 when it was wicked cold out = cold means more air into engine) , the bike is a bored out 125 cc it still has the throat of a 125 if u choke it anymore than it comes (more restrictive filter) performance IMMEDIATELY suffers

and nick , try jumping it from another battery

I had what the charger said was a "good battery" and it read 13.8 volts or such , but wouldn't push enough AMPS to even make the started do anything at all , sounds just like your problem eh ?
hooked up jumper cabled to a good battery it fired right up