Doesn't seem to be a whole lot of data on that. Probably because most people who buy those bikes only keep them for a relatively short period of time. There are numerous threads on the OEM tires but most of them seem to regard those tires in a pretty positive light.
Most of my experience with OE tires on bikes is that they're not bad, but that they don't last as long as a good set of replacements. For example, the stock Dunlops on Harley cruisers tend to last around 8,000 miles for the rear tire, but the preferred replacement Metzeler ME880 tends to last around 12,000 miles for the rear tire.
The OE tires may very well perform great in terms of grip, but so would a high quality replacement and I'd put money on the replacement lasting longer.
Of course HD doesn't list the hp, weight or any "real" performance specs for those bikes, or any of their bikes for that matter.
The weight and torque figures are
listed right on the HD website. If you're going to lie like that, you should at least do so in ways that aren't easily discovered.
I suppose you could nitpick about the lack of a HP figure, but...
Honda's website
doesn't provide a HP figure either. Not even torque. Just weight. Kawasaki is the same,
no HP, no torque, only weight. Same story for Suzuki,
no HP, no torque, just weight.
Of the manufacturers I checked, only Ducati listed both HP and torque. And Ducati's published numbers were inflated over what reviewers' dynos found. Harley's published 44.3 ft-lbs for the Street 750 was almost dead on to the dyno's 43.2, but Ducati's
published 50.6 ft-lbs for the Monster 696 was more than 10% higher than the
44 ft-lb dyno result.
So, based on an objective comparison it seems that Harley lists
more information than most manufacturers and that the information Harley lists is
more accurate than the information listed by the few manufacturers who publish more information.
I like Ducati, they make beautiful bikes that are incredible performers and I'm not intending to cut them down here. My point is simply that your criticism of Harley is woefully ill-informed.
ZV