What can i do to fix my dirt bikes sticking throttle?

My dirt bike is a 1980 kawasaki kx 80. I take the carbuerator apart, clean it, and put it together it sticks. I rode on it a bit and it quit sticking. I took it apart again to replace a part and its sticking again what can i do to stop the sticking???

Before you start changing parts, figure out what's wrong.
Remove the carb, leave the cable attached and the top on.
Stick your finger in and lift the slide.
If it returns, the slide and carb are OK.
If not clean them.
Put the carb back on the bike.
Remove the throttle cable from the throttle (hand grip).
Pull the inner cable.
Does it return?
If yes, then good.
If no, might need a new cable, it's kinked, or routed wrong.
While the cable is still off, spin the throttle (whip it).
It should spin freely.
If not, could be dirty handle bars or throttle pipe (hand grip), damaged throttle pipe - replace it, bent handle bars.
The throttle housing might be dirty or damaged.
Clean it, put it together with the throttle (leave the cable off), and spin it.
Do not lube the handle bars or throttle (will attract dirt).
Leave both completely dry.

it is probably going to need a new throttle cable, my husband is a certified mechanic, i know about these things.
Being twenty-four years old it may be the slide in your carburetor is worn and not sliding freely. Before you change your throttle cable, if you decide that's what it is, check the routing of the cable to make sure it's not pinched, kinked or making too sharp a bend.
Start by trying to lubricate the cable. If that doesn't work check all connections, last resort there is still something wrong with the carb.
Pull the cable off of the butterfly and see if it is the carb sticking or the throttle cable. If it is the cable, trace the routing to see if it is kinked or pinched anywhere. If not count on the cable being freyed and needing replacement.

If the carb is sticking, check to see if the bushings holding the butterfly axle are sticking (pull the buttefly off and twist them).

Good luck.
Move the throttle assembly toward the end of the handle bar about a1/4 inch and see if that helps.
Don E

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