Help! Carrera Cross City issue

[FrancisHayden]

Hello people.

I’ve just bought myself a Cross City from Halfords which I would love to make the most of but it seems to have an irritating issue.

The power cuts in and out in an annoying way. Is this a ‘feature’ or is it just a problem with my particular bike?

(Halfords are being helpful but I’d like to get more information if I can.)

Many thanks,

Francis

 

[Wicky]

The power cuts in and out in an annoying way. Is this a ‘feature’ or is it just a problem with my particular bike?

When does it cut out?

If at around 15—16mph then that's how they come - either push past it using your own steam - or ride keeping in the 'powerband' *

 

[Nealh]

Some bikes cut out abruptly others less so, not a lot one can do if the speed limit can't be changed.

 

[vfr400]

It uses speed control on the pedal assist, where each level gives a different speed limit, not power level, so select a higher level on the control panel to raise the cut-out speed.

 

[FrancisHayden]

Whatever level I choose it does the same.

The graphs show that the power decreases gradually once you reach a certain speed. This doesn’t seem to be what happens. In practice the power seems to cut in and out at random. Has anyone else had this?

 

[vfr400]

In that case, the pedal sensor probably isn't set properly. It's behind the chainwheel, where you'll see a black disk with magnets in it. the sensor is fixed next to it and has a wire coming out of it. The gap between the two has to be an even 1mm (approx). You can wiggle the disc into position with your fingers. It's only friction that holds it in place, so it easily gets knocjed out of position, especially if the chain comes off.

 

[FrancisHayden]

Thanks. That was on my list to check so I’ll look at it tomorrow.

 

[FrancisHayden]

The sensor on this model is quite firmly fixed and doesn’t seem to be adjustable. I’m hoping there is a fault in the ECU and it supposed to reduce power more gradually.