I have a wireless speed meter it reads normal when I’m cycling but when the engine is on it’s readings are wrong it keeps jumping to random numbers. The engine is affecting the reading. Should I change this to a wired unit ? or is there a quick fix ? I was think of putting some insulation tape on the handle bars because then I take the unit off the handle bars it seem to work OK and get a good reading from the sensor on the wheel so It must be picking up some interference from the engine through the frame. I have a wired speed meter on another bike I could change it no problem but before I do are all speed meters affected by the engine ? Scol.