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  1. R

    any evidence of actual extra hp out of K&N or other filters?

    I saw photos of an inverted K&N, if you take the top part off the airbox lid it should work. Chad posted somewhere that he saw up 0.7hp difference doing that on a stock bike and even more on modified engines. I'm a little annoyed by that because i found these posts after i ordered a DNA, which...
  2. R

    Power troubleshooting / Powertronic

    Hey guys, First topic: i have a 2016 RC390 and a 2017 Duke 390. The Duke feels a lot torquier in the midrange and more powerful in general. I'm not sure if that is actually true, maybe is the different riding position etc. What can i do to check the engine health on the RC? I adjusted the...
  3. R

    Standard shims?

    Hi Guys, i just bought a used RC390 with about 12000 km on the odometer. 2 years old but still the 2015 version, one previous owner and 'full service history'. According to the service history the valves were never even checked, also the rubber mat and all the stuff around the engine looked...
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