I was riding my Warrior this weekend and i just noticed that when i give it about half the gas the motor starts making a kind of knocking noise. I dont no if it has been doing it before or not b/c i havn't been able to ride it in about 2 months due to a head on wreck with a blaster so if anyone can help just let me know.

Blue 2001 Warrior
DG nerfs
AC front bumber
Razor Rears
FmF Megamax 2 pipe
Renthal Handle Bars
150 Main Jet

 

It Sounds like your valves, you will probably have to adjust your valves. or improper gas.
Lou