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Old 06-23-2002 | 06:22 AM
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mrbonk
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From: BundabergQueensland, AUSTRALIA
Default YS 91 Exhaust Problem
Originally posted by Crash_N_Burn
Good for you, MrBonk!

Initially, I was worried that running without a muffler would warp the valves, but the guys that have been doing it for years assured me that wasn't so.

Good flying, my friend!
What would cause the valves to warp?
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