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ZXR 400 dynojet problem

Posted: Sun Oct 18, 2020 10:04 am
by belmondo666
Hi guys.. I have a problem. I have installed DYNOJET Stage 1 on my bike as per the instructions. The main jet 96 and the needle on the two groove from the top, fuel composition for 2 turns, floats for 11mm. A motorcycle up to 7000rpm is screwed in by rotation, while already over 7000rpm the engine stops and does not screw in, shoots from the silencer. I set the needle to the last notch and a little better, but still this mid range has too much fuel in my opinion. What do you think about this? I don't know if it makes sense to change main jet 92, or just go back to the original needles. :smt017 :smt017 cgeek :smt017

Re: ZXR 400 dynojet problem

Posted: Wed Dec 30, 2020 7:16 pm
by Hecki
use the oem needle, the dynojet stainless steel kills the brass needle seat.
with aftermarket exhaust, air filter or stock, use 92 main jet. bike run lambda 0,9-0,95 i measured with LSU 4.9 o2 sensor.