1990 zx750 carb problems

[pashtrd]

I have actually tried both of those last year. Neither seemed to make a difference. The funny thing is, the bike runs great until it sits for a few days. After that, I need to clean the carbs again.

[Prince Valiant]

I have actually tried both of those last year. Neither seemed to make a difference. The funny thing is, the bike runs great until it sits for a few days. After that, I need to clean the carbs again.

If you think it's fuel/fuel quality related, I don't think it'd hurt to try a simple fuel treatment like stay-bil or particularly stuff that is formulated for gas mixed with eathanol like we have around here.