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L1 - strange noise at 1/8 throttle

Posted: Mon Mar 23, 2015 1:30 pm
by TurkishJordo
Hi everyone,

So my ZXR400 (L1) has a weird issue: :ffs

If I full throttle I get full response, but if I throttle it and then put the throttle position where it's borderline off, but partially on, the bike is making a strange noise and the revs will slowly drop, they will eventually hold at 5-6k which is fine as I'm cruising, but the exhaust sounds funky-hard to explain..

Basically at 1/8 throttle position AFTER I've given it some good amount of throttle, the revs slowly drop (normal, to match the throttle position) but the bike is making a strange vibration/hesitant/bleeeeeer sort of noise, if I then wack the throttle open I get full response, maybe a tiny tiny amount of hesitation but nothing of concern - anyone know what this could be? Carbs?

Carbs have been balanced, bike serviced, new exhaust system (does it on both systems) I'm lost!

Re: L1 - strange noise at 1/8 throttle

Posted: Tue Apr 28, 2015 1:25 am
by TurkishJordo
RESOLVED: Dirty main jets was causing this very weird noise/hesitation/vibrating sound.
- 2 tins of Carb/Intake cleaner and she's running like a beauty - oh, apart from the blown head gasket and fork seals - my month, eh! cgeek