it wasn't doing extended shit. it was stone dead wouldn't crank over. they were very old to begin with. when i got the bike the float bowl was stuck and the jets were plugged up with crud etc. i've rejet it and overhauled the carb a few months ago. i'm just now getting around to doing the plugs because it wouldn't start or stay running for more than a few seconds. i also had some junk gas in the system i had to cycle through and so far its much better. i only let it idle for about a minute after i started it last night i just wanted to hear if that clacking noise stopped which it did. i'll give it a longer run this weekend.