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Discussion Starter · #1 ·
I have the TRS full yosi exhaust with no airbox mods yet. I want to keep the lid on for now. I was wondering what main jet and if you have to mess with the air screw.Any info would be appreciated.
 

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When I got my Yoshi they said if you dont do any air box mods you can run the stock jetting but I never did this I started off with no lid, so i cant say for sure that you wont have to rejet so you will have to see how it runs
 

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I have the yoshi slip-on on my 450r and they clearly told me at the dealership that i didnt need to jet if i have the stock air filter and lid on. I'm running it like so and i have no problems. I plan on getting a k&n filter and jetting it soon.
 

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Discussion Starter · #5 ·
Thanks Desert 450r for the jetting specs.. I tried them and it runs great, didn't even have to mess with air screw. :D
 
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