Sadly, Honda have not offered ABS as an option on their 2004 NSS250, and neither have Yamaha, or Suzuki on their 250/400cc big-scoots. It's a shame, but the market didn't take to ABS (due to the inherant conservative nature of motorcyclists) and obviously the manufacturers think that pneumatic combined braking systems are more ecomonical that ABS whilst giving many of the benefits of the expensive electrical system.
I own a Honda CB1100 x11 naked fitted with CBS and can confirm that it only falls a little short of ABS. However, my ownership of an NSS250 ABS tells me that it iscertainly a nice to have. My AN650 has neither combined brakes or ABS, and whilst the brakes are powerful in the dry, you are not able to brake as confidently in panic situations with on the 650 as you can on the ABS NSS250 or CBS CB1100 x11.
I hope that we will see a return to ABS as top fo the options list, but the indications are that it may not.
