MZ/MuZ Riders

I need to replace the drive cable for my speedometer. I don't mind the KM as I can do that math in my head (ok, this is a lie. I just know a couple of conversions) but I do need the thing to work. Anyone know a replacement cable or at least the length I'll need? What is the stock length?
Thanks
Dic

I found a universal speedometer core at my local Advance Auto Parts store. Its 83 in long so I'll cut it to fit. Part was $9.04. Not much money. I also have ordered a Digital speedometer from Amazon
http://www.amazon.com/gp/product/B00DFM ... UTF8&psc=1
For $60.00 it looks like it will work.

So, I have the digital Speedometer in hand but the repaired cable is working perfectly. I will hold on the the new cluster in case I need it in the future.
I repaired the cable housing using a tube flaring tool (plumbing supplies appox $20.00usd) and some heat shrink. Also a cable crimper ($80.00usd Cable TV type) to attach the screw-on fitting to the Speedometer and the Drive unit at the wheel. Graphite to lube the cable and a touch of silicone grease to seal the connections at the drive and the gauges. Everything works and it didn't cost very much.

got one of those blue speedo adaptors on my cable seems to work, also got a cycle speedo too... that is great