FZRSupport: the FZROnline Archive

Hello, I can't find any information to tune the carburetors. I found informations for YZF thundercat, FZR 600, but nothing for my 4JH YZF600R with 34mm Keihin CVK. Also it seems that there is no dynojet jet kits for this bike. The 4142 kit presented as suitable for this bike has for bigger main jet ...

ok, I was also worried about that because I didn't see any return line to the fuel tank.

Thank you ! Now I know my bike a little bit more !

ok thank you for the answer. On my model it must be the cutting of the pump because I already ran few miles with the fuel level light on and without the switch on "res" without noticing any sign of loss of power (the fuel level was certainly still enough high to feed the carbs). So if I understand c...

Hi, sorry in advance for this newbie questions but I really can't figure out how the pump works ? I hear it during five seconds each time I turn the key on and then it stops. Since the motor isn't running, the gas can't go to the carburetors (depression valve), so why running the pump before startup...