Posted by Chris Case [173.245.48.126] on Tuesday, September 18, 2018 at 08:04:22 :
In Reply to: speedometer question posted by Bruce in seriously wet BC [108.162.246.146] on Tuesday, September 18, 2018 at 01:25:51 :
You are right, it is some even ratio.
I used a stroboscope or a tachymeter to check the speeds on my lathe, found on for 43 mph, just right for a PW. What you actually adjust is the spring tension on the needle. Chuck the tranny end of a cable in the lathe and dial it in.
Tim is verifying that both speedos are the same befpore tackling his gears. I suspect a t/c wswpa woith the wring drive gear. 4 vs 5 teeth is 20%... or he needs to change the pinion to 11 teeth.