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running problems


pray750r

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Posted (edited)

hi need help i just got my gsxr750m 1991 out for first time yesterday.started ok took it for a run was just spluttering a bit then would go great then die and start going again then open throttle nothing then after a few seconds would go fine just got home then stopped snd would not start again dont no what it is please any help thanks paul

Edited by pray750r
missed number out
Posted

In that case personally I’d be whipping the carbs off for a strip and clean etc and fresh plugs too. If there’s a fuel filter check/clean/replace too. All assuming it ran fine before storage that is and that there’s no rust in the tank.

Posted (edited)

To save yourself a bit work, first try Yamaha Carb Cleaner. It's kind to the o rings & plastics that reside in your carbs. Try to get the old stock stuff in the black bottle, with the red label. Rather than the newer stuff with the yellow  label. As usual, the 'do gooders' fucked a good product up, on the grounds of Elf n Safety! Follow the instructions, and it may do the job for you. If it doesn't, at least your carbs will be nice and clean when you strip them down! Nothing complicated in stripping them. Be methodical, and keep each carbs components in seperate pots. Replace mangled crosshead screws with capheads. Make's it easier for you next time round! 

And, if you do have to strip them down, a dip in the Ultrasonic bath isn't a bad idea!

Edited by Swiss Toni
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