NC30 Speedo reading wrong??????

Jmcdonnell82 · Post by **Jmcdonnell82** » Mon Jun 10, 2013 10:55 pm

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.

magg · Post by **magg** » Tue Jun 11, 2013 2:39 am

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

Jmcdonnell82 · Post by **Jmcdonnell82** » Tue Jun 11, 2013 9:59 am

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

Post by **CMSMJ1** » Tue Jun 11, 2013 10:08 am

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?

Post by **Neosophist** » Tue Jun 11, 2013 10:36 am

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.

magg · Post by **magg** » Tue Jun 11, 2013 11:32 am

How many teeth on the gearbox sprocket?

NC30 Speedo reading wrong??????

NC30 Speedo reading wrong??????

Re: NC30 Speedo reading wrong??????

Re: NC30 Speedo reading wrong??????

Re: NC30 Speedo reading wrong??????

Re: NC30 Speedo reading wrong??????

Re: NC30 Speedo reading wrong??????