imported post
The 1500 being 6 cyl doesn't put as much strain on the belts as the earlier 4 cyl wings did.The lobe pattern is very even on the 1500 so the strain is very constant. That's why the Honda recommendation is so much higher for the 1500 than the earlier bikes.
In fact, they don't even recommend the replacement, they only recommend an inspection at 100,000 miles.
But in my experience, in order to do an inspection, you have to do so much work that it's only a bit more to just go ahead and replace them.
In addition, most people here seem to feel that the significant issue has now become the age of the belts due to time, not mileage. The rubber is bound to dry out after a number of years. There isn't a hard and fast rule, but the general consensus has been that if your belts are over 10 years old it's time to change them. And if you buy a bike and you do not know when they were changed, the only safe assumption is that they haven't been changed and go ahead and change them.
Some people here aren't comfortable with the 10 years, and so recommend even sooner. Most recommendations I've seen fall between 6 and 10 years.