My DNA air filter arrived last week and I finally fitted it last night. I wasn't expecting any performance gains as I thought they'd have come from doing the outer one and the snorkel removed and any gains from this would be nominal. But its really made a difference to pick up and throttle roll ons. Its much smoother at lower revs. Result.

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Stage 1 & 2 DNA filters / Kev fuel mod / snorkel mod / Fork Spacer mod / Titax stubby levers /