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 Air box Flapper Valve removal

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MississippiDan

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PostSubject: Air box Flapper Valve removal   Wed Jan 03, 2018 10:13 pm

I have a 2017 Yamaha WR250R, I keep seeing videos on removing the air box flapper valve, I understand that it greatly helps throttle response. My question, is this worth doing and if I do, will it cause it to run lean and require a computer map change ?
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rsteiger

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PostSubject: Re: Air box Flapper Valve removal   Thu Jan 04, 2018 5:32 pm

MississippiDan wrote:
I have a 2017 Yamaha WR250R, I keep seeing videos on removing the air box flapper valve, I understand that it greatly helps throttle response. My question, is this worth doing and if I do, will it cause it to run lean and require a computer map change ?

See my response in your other post.

There is a easier way to do this that is very easily reversed if you don't like it.
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Potentate




PostSubject: Re: Air box Flapper Valve removal   Sat Jan 13, 2018 3:12 pm

There are some guys who proved it does increase power. I did it, it wasn't difficult, and I've never had it run lean or cause issues, but I also can't say that it "feels" any different.
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Air box Flapper Valve removal
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