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2003 yz125 carb questions

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Hi, I just bought this yz and it leaks a lot of gas at idle, and now it wont start unless popstarted then bogs out in a few seconds. I think the float is sticking or the float seal, but this is my first two stroke and im not really familiar with the powervalve and its function and if could be a problem. Also it fouls plugs so i was wondering what you guys would run... It has a sst pipe, 600ft elevation, and i run 93 octane 32:1. I guess im wondering what to do and what to look for.

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You are probably correct that the float is set wrong or sticking.  Since you just got the bike I would take the carb apart and check and see what kind of jetting it has and if it is different then stock.  Always good to know. lots of great info on this site on dialing in your carb.  Good luck..

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