easy fix
at the end of the throttle cable there is a small dust cover (rubber)
when they start to get old they start to fall apart or kind of melt remove it and clean as mush of it off as oyu can this should take care of your problem good luck
at the end of the throttle cable there is a small dust cover (rubber)
when they start to get old they start to fall apart or kind of melt remove it and clean as mush of it off as oyu can this should take care of your problem good luck