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Message: [QUOTE="mox69, post: 1194870, member: 76391"] Again I can only speak from my experience. If your riding on "private land," they are very liberal with the SA requirements. The previous race I was at they just gave people some wire and a mesh screen to put over the back. So far all of the races I have been to, you have to pass a sound test. 96db** is the limit here. Almost every two stroke will pass that, possibly not if you have a shorty silencer or something weird. In MN when races are held on public land state agents (DNR) show up and check for USFS approved spark arrestors and a current off road registration for the bike. Best bet is to call the people in charge of the race and ask. **Also note that they just started doing sound checks at MX races around here. For some reason that limit is 99db. Lotsa people getting confused / annoyed with that in my district. [/QUOTE]