I am runnin a 2004 Ltz-250 its stock but i am gonna take of the airbox lid and i was wondering what kind of jets to use like size etc, i also need a pair of rear tires trying to keep it under 125 on the tires i am runnin a race on the 25th agenst some buddies and my tires just popped and i want to send some extra power through it with a low budget thx .
Jesse

 

for the tires, get Maxxis Razr's

 

I'll second the razrs, I put them on my bike not long ago. Tough tires.