hi everyone i have a question and i have done a search already. i am thinking of entering a few poker runs and enduros this summer and i was curious if anyone knew if my 04 yz450f with factory exhaust and a dr.d spark arrestor will pass the sound tests? i have had people thank me for having a quiet 450?(a guy at tahuya thanked me for having a quiet 450, he said that alot of people were "uncorking" their exhaust and it was going to close the riding area) i do know that it is way quieter than my 426 that had a white brothers e-series exhaust but i just dont know if it will pass the sound tests or not. i have never sound tested anything ever and i dont even know how they do it. thanks in advance for all the quick replys!