Why is my Q scooter on a go-slow at high revs?

Motorcycle News (UK) - - Garage -

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.

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