hi im new to dirt bikes and i just bought a 2008 hummer with a zongshen 250cc. what should i do to it or change because its used and also how do i reduce slack in the throttle? are there any cheap easy mods to do? also what about maintainence what should i do to it and how often? also the bike will not idle when cold if the throttle is not being applied how do i fix that? thanks
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