Well, it looks like they are going to enforce this one. I was at Hollister yesterday, and I saw a couple of four stroke guys getting tickets.
They will let you in without getting a soundcheck, but they can and will ticket you out on the trails. They are soundchecking bikes near the gate, and if you pass you get a sticker on your Red/Green sticker.
My 03 CR250 that is all stock except for a Turbine Core II, just barely passed at 96.1 dB.(Actually 0.1 over but they let it slide)
They will let you in without getting a soundcheck, but they can and will ticket you out on the trails. They are soundchecking bikes near the gate, and if you pass you get a sticker on your Red/Green sticker.
My 03 CR250 that is all stock except for a Turbine Core II, just barely passed at 96.1 dB.(Actually 0.1 over but they let it slide)