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  1. Engine and Technical Discussion
    Hi everyone, I am new here and am in search of some guidance and help. I bought my N400 back in October 2021, and shortly after purchasing it, it started having a slight oil leak and the red indicator for overheating lit up with the gauge lit up to all bars as well. So, here I am now. I have...
  2. Ninja 400 General Discussion Forum
    Hey Ninjas, I started riding in winter. My first ever ride on the street was at 23 fahrenheit. Now I have ridden in snow, cold rain, 2 hour torrential downpour. It was always straight forward: Layer up, waterproof winter gear. But oddly, I haven’t ridden in 75-85 degree weather with rain. Does...
  3. Ninja 400 Complaints, Issues And Problems
    I have a 2018 Ninja 400 with just under 3,000 miles. I just changed the oil and flushed the old coolant and replaced it with Engine Ice. After about 15-20 mins of idling the temp gage is all the way up and the red light comes on. I tried squeezing the coolant lines and letting the coolant drain...
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