Aftermarket exhaust - Yamaha FZ-09 Forum
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post #1 of 2 Old 03-19-2019, 08:30 AM Thread Starter
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Aftermarket exhaust

Check out this exhaust.. just bought the bike. I don’t think any ecu flash has been done. Is it ok to run the bike like this or get ecu flash? Maybe power commander? Anyone have a stock exhaust they wanna get rid of? 😆
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post #2 of 2 Old 04-01-2019, 04:30 AM
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That's gonna be loud! Nice bike! I would say if a dealer is selling it someone has already been riding it without blowing up lol. Seems to be a common theme on this forum to tell people if you put an exhaust on without flashing it the bike will lean out and die.. it's nonsense. Yes it will run better with the flash but the bike won't die without it

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