My new theory is to sell em or trade them with ~ 20,000 on em and get a new one. otherwise you end up with 12 old bikes in the garage that you can't get rid of.
I think if you do the math on that the numbers don't support it.
Let's see, if you buy a bike new for 7 grand and ride it till its worth $1,000 then you've depreciated $6,000.
If instead you change bikes every 20,000 miles you'll have to change 5 times over that 100,000 mile period (including the last bike that you will be trying to sell at it's 20k mark).
Lets say those 5 bikes are all similar value to the original $7,000 and that 20,000 miles on a bike halves its value.
5*7000/2 = 17,500 dollars of depreciation.
The purchase price of $7000 doesnt really matter much here, if you assume that 100,000 miles depreciates about 85% and 20,000 miles depreciates about 50% then the final ratios are going to stay on the order of 1:3.
Now if you really WANT a new motorcycle every 20,000 miles don't let me stop you. Just don't think you're saving money.
Man this three day weekend is killing me, I need to get back to work so I can bore people with this #$%& there.