I have 2000 RSV. Tried out the cruise yesterday and when "cruise set" i locks the cruise at about 5 mph slower than what I'm traveling. Then I have to press accel to get up to speed. Then it will only hold that speed for 1/2 mile or so and start slowing down. I can keep pressing accel up but bike won't hold speed on it's own. I this something I can look at fixing myself? or do I need to bring it in?