[Sharps40]

Looks like my math was pretty good.....The speedometer corrects (with the instock 27.3% ratio reducer) to within about 2 or 3 mph against the GPS. It appears I am actually going about 62ish per Mistress Garman when my speedo needle is bouncing around the 60ish mark.

So, the speedo now reads a touch slower than I am actually going. Not bad and certaintly better than the 6ish mph higher than actual speed that I was getting before....

So....I'm going to drive it for a while, watching Mistress Garman untill I am confident that I have the new numbers figured right.

And, perhaps, if I can find one cheep, I'll try a 19 tooth driven gear. Math indicates that with the ratio reducer installed this should get me spot on (within a few tenths of a percent). Course, its hard to tell how perfect is perfect with an old and somewhat bouncy needle!

Its hard to make fine adjustments with such coarse gears. Guess thats why a lot of em have much higher tooth counts these days.