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  1. Modifications
    Hi, I have a 2010 EFI Ninja 250 R. I want to do a full system exhaust mod from Yoshi / 2 Bros / Area P. 1. Does the bike need to be re-tuned for these to work properly? Or can I just get it fitted and start seeing improved perf? I'm assuming re-jetting can't be done because there are no...
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