Hi,

I have just finished building my NC30 and having taken her out for a few test rides I'm not sure the speedo is correct.

I'm following the flow of traffic (approx 70mp)on a dual carriageway and my speedo is reading 90mph. Does anyone know what would cause the difference and how I could fix it??

Cheers.

What gearing and rear wheel/ryre sizes are you running?

Standard wheel size but the rear sprocket is a 42 tooth. Would that be the cause? If so how can I fix it?

It drives off the gearbox sprocket and so is fixed to the revs of the bike

fitting a larger rear sprocket will make it read high, but not that high

You sure it is a proper NC30 speedo?

CMSMJ1 wrote:It drives off the gearbox sprocket and so is fixed to the revs of the bike

fitting a larger rear sprocket will make it read high, but not that high

You sure it is a proper NC30 speedo?

Somebody could have had it apart and took the needle off and then put it on in the wrong place.

After which they are a nightmare to get right.

How many teeth on the gearbox sprocket?