if your engine is new shape(clutch nut on the outside) you can either buy a runner 180 drum wheel (12 inch) or do a disc conversion.
cant convert one to nrg wheels unless its the old 108mm drum where as yours is 200mm... im working on doing a hub conversion so you can use a 50 hub with nrg disk wheel on a 125.... lots of work tho
i have a nrg rim here with the 5 bolts for the rear... drum one... i would use it on my typhoon but mine is the older style and needs 1 nut :msn1: so if your interested pm me...
see where the 5 bolts go (the thing with the disk) its called the hub... this has the same size bolt/shaft (24mm)