I am surprised that previous post showed up? My 10 yo PC has been playing games for the last few day's, i can't get it to run now. Link's etc won't work on my phone, and the small screen make's it hard to see what i've written too. You should be able to change the tyre size in the Gearing Commander i posted back a couple of post's, that'll give you an accurate speed. Once you work out the speedo, then you might be able to use a speedo drive gear out of another bike that run's bigger wheel's/similar height to correct the reading at your speedo head. So by fitting taller wheel/tyre's, you have changed your factory gear to be quite tall too, good for pulling high top speed's! Might be worth looking into finding a smaller front sprocket (2 or 3 teeth smaller) so you don't burn out the clutch's in your gearbox. The indicator bulb's in the speedo head might just be a bad earth in the headlight bucket? They could also just be blown due to age, or from being overpowered with the tail light being out etc. Iirc they are 1.2w bulb's? Do you have a multimeter you can check it out with?