But, from the pics you've posted here, I doubt the crack was due to "Manufacturers Defects" Abusive riding is NOT covered under the warranty! The price we pay to play!
L8R
__________________
"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming, "WOW, What a Ride!" - unknown
"Your Bike Sucks" - Sky Yaeger