As of February 10th, 2009 a lead ban on all products designed for children ages 12 or under could effectively end the sport of ATV and Motorcycle riding for our children. The act sets the limit at "600 parts per million total lead content by weight for any part of the product." That limit will drop to 300 ppm one year after the date of enactment and 100 ppm three years after unless deemed technologically unfeasible.
you could also make the bike heavier lol.
with this part being key..
unless deemed technologically unfeasible.