1.it is fit for 200cc watercooling engine 2.piston pin size 53mm,piston size 63.5mm. ... cooling piston set.2.we also can supply many other engine spare parts,like as Loncin,Lifan,YinXiang,Zongshen,CG125 ... a manufacturer,we mainly supply spare parts for dirt bike,pocket bike,scooter,ATV,other motorcycle and so on.all of ... please feel free to contact me. China 200cc ATV watercooling engine kit piston 66mm