In addition to the list of Diameter Piston Yamaha, Honda, Suzuki, and Kawasaki (Besides Japan)

Attention to measure the diameter of the piston must be in his ass
The following data piston diameter brands besides Yamaha, Honda, Suzuki, and Kawasaki (Besides Japan).
Piston 4 stroke:

     Bajaj Pulsar 135 = 54 mm
     Bajaj Pulsar 150 = 57 mm
     Bajaj Pulsar 180 = 63.5 mm
     Bajaj Discover 135 = 58 mm
     Bajaj XCD 125 = 54 mm
     Happy Faster = 47 mm
     Happy Faster R = 50 mm
     Happy Faster X = 50 mm
     Happy Jet ZR = 50 mm
     Happy Jet ZX = 50 mm
     Happy Sporty R = 50 mm
     Happy Swing R 125 = 52.25 mm
     Happy Nexium = 65.5 mm
     Happy Swift 200R =
     TVS Victor = 51 mm
     Jialing Moped = 50 mm
     Jialing Evomatic 125 = 52.4 mm
     Jialing Wheels 3150 & 200 = 63.5 mm
     Emperor Triseda Wheels 3 = 62 mm
     KTM Wheels 3 Elephants 150 = 62 mm
     Works 150 Wheels 3 = 62 mm
     Works 200 Wheels 3 = 63.5 mm
     Minerva 150 R = 61 mm
     Minerva MadAss 125 = 52.4 mm
     Minerva X-Road = 61 mm
     Minerva Supermoto 250 = 72.5 mm
     Minerva Naked 250 = 72.5 mm
     Minerva Megelli 250 = 77 mm