I have a 2000 dyna low rider and my speedo started acting up while I was crusing around 60 today. The speedo stopped working and the engine light came on. When I engaged the clutch and let it idle down, it started back working and the engine light went off. When I let off the clutch and brought the rpms back up, the speedo went to zero again and the engine light came back on. The odometer went blank also. As long as the rpms are low, there's no problem. Any help on the solution?