I have a '98 Sportster 883 Hugger. I am having a speedo issue. When idling it sits about 2mph. When moving it shoots up to 34mph and doesn't move no matter how fast I'm going. Odometer is spot on and reads mileage perfectly. Turn signals auto cancel and bike never dies. Checked speedo for codes and it is showing none. Cleaned sensor and it didn't work so I replaced it. Still doing the same thing. Replaced plugs (saw somewhere where that fixed a speedo issue) and nothing. This is aggravating to say the least. Please help!