Bit of background: I purchased a non running 98 that had been neglected for some years and wires/hoses chewed by rodents that had built a nest in the V. After much work it is now on the road but the speedo shows 80kph when doing 100kph. Checking with a GPS phone app it seems to be reasonably accurate up to around 30. Have checked the speed sender and the little plastic socket that fits over the countershaft sprocket nut seems tight. Any ideas?
BTW gearing is 17-45 which should put it out more the other way