We have a choice.
Deal with the speedometer.
Change the gearing as a patch for an inaccurate speedo.
Buy a speedo healer.
I think that the cost of a sprocket being less than a speedo healer is a pretty poor excuse, but do as you wish.
I gear the bike for MY riding style which happens to be spot on the way it was shipped. I can deal with the speedo if its off.
Changing the gearing to deal with the speedo, kind of like tuning your suspension for 10% of the riding conditions.
I do change my oil every 2,000 miles
I also use cheapo (still to spec) oil and filters. They cost me less than $12.00 per oil change.
to each his own.
David still smiling from ear to ear on my V
I was sitting in court when I was in college (30 years ago) with a speeding ticket for 85 in a 55. The guy in front of me had a note saying his speedo was off thinking he would get out of the ticket. Judge said (paraphrased, its been a long time) "I don't care if its off, you go by things faster like phone poles. I can tell just by looking out the window I am gong too fast" He got a fine just like the rest of us.
I had an attorney. Cost me $150.00 plus the same for the attorney fee. I have not had a speeding ticket since.