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  1. How To And DIY
    Many of you have probably heard of, or even done the Yamaha R6 Throttle Tube Mod for the N400. You can purchase it here with grip pre-installed: Short Throw Throttle w/ Grip for Yamaha, Kawasaki (OEM R6 Throttle Tube) Norton Motorsports has a very detailed write-up with photo going over whats...
  2. Engine and Technical Discussion
    Hey guys! I have a brand new 2021 ninja 400 that I’m still breaking in. It’s been doing really really well, but it started doing some thing funny today. Normally, if I give it about 1/8 throttle into my first gear it will go into gear and takeoff. Today, I have to give it much more throttle in...
  3. Ninja 400 Complaints, Issues And Problems
    Hey Friends, Sad news again. I had the 400 out during the night with a cover on and handlebar lock on. The wind blew it over overnight, onto the opposite side of the kickstand [it fell on the right side], must have been quite violent out there. Now I stood her back up and I got her started and...
  4. Ninja 400 Complaints, Issues And Problems
    So I’ve been having an issue were the throttle free play increases in higher gears or speeds. Which creates an issue when rev matching and braking hard. It’s not a huge problem but I do want to fix it. I keep the throttle free play pretty tight, but to where it still idles at 1,300 rpm and no...
  5. Parts & Accessories
    I had installed the r6 throttle tube from Norton motorspprts but after some months with it now I've decided I would rather go back to the stock throttle tube, so I have 2 questions I guess 1. Can I just swap the throttle tubes and be good? (Per norton motorsports guide i filed down the cable...
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