just adjust the idle....that little dial on the left side just infront of your rear set...start your bike and just start adjusting it a bit at a time and get it set to about 1500rpms...some say more or less, like 1350 and junk like that, but last i checked my tach doesnt give me anything that specific so i just stuck it at half way between 1 & 2 grand. my bike did that untill i adjusted it...if that doesnt fix it then you've got a bigger problem somewhere else
edit: which would be a big

to the comment about low rpms because thats all it is causing it to stall