I just bought an FZR 600 and have been working the kinks out of it, one of them being the throttle sticking when i rev it, almost like a cruise control. Pretty scary! I have the airbox off and am looking at the 4 carbs, Please if anyone can tell me how to adjust the throttle pull back cable it would make my day so much better!
SOURCE: Throttle Cable Stuck Wide Open?
you need to re coil the spring or replace it for it to pull back in to poistion
SOURCE: replaced throttle cable on pw50 but can't seem to get it adjusted
If I understand your problem correctly this may help. There should be a spring just a bit smaller diameter than the slide that mounts between the top of the slide and the bottom of the carb cap. No spring means no snap-back. I am assuming there are no kinks in the cable and the cable was routed correctly when installed. Lots of times if the cable is not routed properly the gas tank will "stretch" the cable when the tank is re-mounted. Route the cable properly and the problem goes away..... As far as the slack in the cable, there is a an adjusting screw on the top of the carb (where the cable ends) and an adjuster screw at the hand throttle also where the cable ends. Some bikes have an extra adjuster mid cable but I don't think yours does, (working from memory here). If none of the above work then my guess is that the parts counter handed you the wrong part.
SOURCE: 92 yamaha fzr 600r clutch lever sticks and clutch slips
Sounds like the bike has been doing wheeles and burnouts. As the clutch plates wear the cable needs adjusting. You have reached the end of the actuating cam. New plates are your best bet.
SOURCE: 1985 yamaha moto 4 200 power surges
Check the carbs if all jets are well placed, needles all at same height, float levels equal, collars between carbs and cil head all tight, rubbers not punctured or broken...
SOURCE: Pw50 starts first time everytime but will not
PW have the stop\start\run switch and will not rev in the start position, there may be a problem in this switch, wire, or the ignition box which controlls this.
The small 50s can also build up carbon in the exhaust port, or the exit end of the muffler.
They also need the original air filter and cover (dont know why, but they wont rev without it).
I realize you may have checked some of these, but not much else goes wrong
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