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  1. Kawasaki Ninja 400/Z400 Track And Racers
    hello, i have two race spec ninjas. around 53-55 hp, how to improve that? tuned: exhaust (arrow titanium), airbox, airflow, ecu, cams, 415 chain. i have my own dyno.
  2. Ninja 400/Z400 General Discussion Forum
    Hi everyone I just wanted to quickly write a review on the boosterplug, so u guys can decide if you want to buy it or not. What i noticed right away, after installing it: my bike revs higher when starting it up the enginebreaking is not that harsh anymore, still not an "extreme difference"...
  3. Engine and Technical Discussion
    Hello everyone, I wanted to see if anyone has any experience with EDR velocity stacks and knows how they compare to other available options on the market (like Norton's velocity stacks). My main questions are: 1) Has anyone installed them and can let me know where to cut the OEM velocity...
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