i have a cagllari pb and cant get it to stay running long enough to make it around my block which is a mile exactly but it makes it about a quarter of the way than bogs and if i dont get off the gas it will die. i already took off the carb and i cant see where there is supposed to be a clip on the needle that i can move? the spark plug looks a little grey. the bike idles just fine and takes off good to but as soon as top speed is approaching it bogs a little than bogs a lot. i changed the fuel filter and am about to go to autozone for some clear fuel lines but if that doesnt work i heard you can drill the jets bigger??? HELP PLEASE!!!!