I look at it like this. 100k is Alot of miles for a car, so 25k is alot of miles to a bike. I use that formula. At 15k my bikes thermostat went out, at 18k needed all new spark plugs and the motor vibating them all out,at 20k the slave clutch cyclinder went out, at 25k I needed a total motor rebuild. This was a yamaha. Yamaha needs valve adjustments at 25k also,, susuki need it at 15k.