Mexican visa, time limits
 

Howdy all..
can anyone help me out on this one? i understand from the usa to mexico i enter and recieve a 6 month visa and import permit for the bike.

my question is: may i exit mexico at the end of the 6 months and turn right around and re enter and recieve 6 more months?.

is there a time requirement that must pass before i re enter? if i am able to do this, how many times could i do it? any info on this subject would be really appreciated.. thanks
wyomex