Why is my Q scooter on a go-slow at high revs?
I’ve just got a Yamaha YP400 scooter for my commute but it has started to cut out when it gets to 5500rpm. I’ve looked for any obvious connection issues, as well as running a multimeter over the alternator and ignition wiring without any joy. Jeff Brooks, email
Answered by Charles Marvell, A Flitwick Motorcycles I’m not surprised you are struggling to identify the cause as we had one in with the same problem and it was, believe it or not, down to a failed speedo sensor.