my blaster's motor is scratched
 

I was ridding out on a local lake this past weekend, and my blaster was running great. Then, it stopped working. The motor quickly reved down, and i grabbed the clutch. I changed the plug, and tried everything. Then, i took off the head, and found huge scratches. What is the cause? Was i running too lean? How do i stop this?

my blaster's motor is scratched
 

you got something in your motor.

my blaster's motor is scratched
 

Did the injector stop injecting oil?

my blaster's motor is scratched
 

time for a new top-end. If you haven't blocked off the injector, block it off and check for any metal chips in the crankcase and cylinder.