I was riding my 04 sportsman 600 yesterday throttle was fine. Started it up this morning and the throttle is sticking. If I push the gas and let off it sticks but the rpms very slowly drop. If I push the gas more than half way the rpms just keep going up and I have to manually pull the throttle back, I sprayed some penetrating oil in the throttle housing and down the throttle cable but didn't help much. Don't know what else to do besides get a new cable but I don't know why I feel like the cable isn't the issue?