Topic: 1981 CB650 throttle sticking

[sam0917]

Just picked up an 81 cb650. The throttle cable does not return at all on it own when turned. I believe the handlebars are slightly lower than stock, not sure if they were modified to fit correctly. What do you guys recommend for oil or new cables?

[MoMo]

Just picked up an 81 cb650. The throttle cable does not return at all on it own when turned. I believe the handlebars are slightly lower than stock, not sure if they were modified to fit correctly. What do you guys recommend for oil or new cables?

Things to check for:  improper routing of cables, pinched cables, wrong length cables,  dirty throttle sleeve, throttle grip rubbing against switch or handlebar, carb slides gummed up.  Think that covers about every scenario I can think of.  I use Dri-Slide for cable lube.  Welcome...Larry

[DaveBarbier]

+1 to what Momo said. I would start segregating sections and see what happens. Do the carbs snap back when cables are disconnected? If you give more slack in the cable does it get better? If you turn the handlebars to full lock left or right does it stick more/less?

These are CV carbs, right? VB46a?


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[RandomOrbit]

Mine was doing that for a while early this summer just before the throttle cable broke.   

I would suggest you lube the cable immediately, and check the housing for kinks while you're at it. If that doesn't immediately fix the problem, replace the cable. (Probably the pull cable, but might as well replace the push cable while you are at it)

There certainly COULD be other problems, and you can easily check the carb linkages for binding while you're in there, but a throttle cable in need of lubrication is the most likely cause, and if it's been that way for a while, the cable and/or housing might have suffered friction damage.