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Message: [QUOTE="bikepilot, post: 919303, member: 56976"] I did exactly as you describe, in fact my entire riding club did that for a few seasons. Worked well, was cheep and didn't affect the power that we could tell. The law at that time only required the spark arrestor not allow objects beyond a certain diamater out of the tail pipe, the screen we all used was much finer than the requirement so we were legal:) I don't know what the situtation is now, this was about 6 years ago. good luck:) [/QUOTE]