Suspect a carb problem - Suzuki Z400 Forum : Z400 Forums
 
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post #1 of 7 (permalink) Old 09-12-2019, 11:58 PM Thread Starter
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I have a 05 Z400 it’s had some problems since the day I bought it but not as bad as they are now the old carb what crusty and the jets were way to big so I bought a new one with all stock jets and now the bike starts go to pop and crack while in mid range rpm unless it’s in neutral than I back fires real bad when the rpm drop tried adjusting the idle and fuel screw but nothing I’m running it with the air box lid on and it has a big gun slip on besides that all stock the snorkel has been cut off close to the air box.
Also the stock head pipe after a few minutes gets red hot even when the bike ran semi good And it kinda gives off a sneezing sound and almost dies or does

Last edited by Backwoods_rider; 09-13-2019 at 12:08 AM.
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post #2 of 7 (permalink) Old 09-13-2019, 11:35 AM
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Sounds like you are running lean. Try a bigger main jet.
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post #3 of 7 (permalink) Old 09-13-2019, 05:06 PM Thread Starter
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My old one has a 155 main and still had problems
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post #4 of 7 (permalink) Old 09-13-2019, 06:46 PM Thread Starter
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Has a over sized tank with different petcock do I need to plug the vacuum line
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post #5 of 7 (permalink) Old 09-14-2019, 11:23 AM
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Yes
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post #6 of 7 (permalink) Old 09-15-2019, 09:32 PM Thread Starter
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Plugged vacuum line and runs a lot better but still have hesetation at about 1/2 throttle while riding
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post #7 of 7 (permalink) Old 09-17-2019, 02:15 AM
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Many here are better at this than me, but I would try raising the needle to the next clip to see if it helps.
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