From Google Translate:
OPEN ORDER SINNOB VERSION BELT NINJA 250F, CB150R, VIXION LIGHTING
Bro & Sis ... Be ready to become the first user of Power Transmission Set Sinnob with BELT system, Special online Booking Special area of DKI Jakarta we open from now on special for user Kawasaki NINJA 250 Fi CB150R, VIXION LIGHTING, Please do order by email: sinnob @ gmail.com with order format as follows:
Name:
Address:
No.Telp / HP:
Order: BELT
Get the promo price for the first 25 subscribers .....
Limited edition is only 25 Sets.
So it looks like they aren't in production yet, and they're going to make a limited run of 25 sets for some reason. Beta testing maybe? They say the belt pulleys are polyurethane, which is often used for low volume molding. It's often not the best material for longevity though. In five or ten years you may find that a pulley crumbles under load, or has turned to chewing gum.
If you put
http://www.sinnob.com into the Google Translate box, it'll translate the whole site.