[Fitment]Fit Honda CRF50 XR50 CRF50F (not fit Honda other modle). And Their Copies 70cc-125cc Bikes From China, Such As Chinese Made CRF50,XR50,SSR,YCF,IMR,Atomik,x-pro,Baja,Motovox,TTR,Thumpstar,BSE,Apollo,Kayo,Stomp,Piranha,DHZ,GPX,Pitster Pro,SDG,Braaap,Taotao,Coolster,Roketa,Lifan,YX,Ect And Many Other Chinese Brands. [Fitment]known Compatible with the following models:for Honda CRF50??XR50, CRF50F, SSR SR70 ,SR70, SR70B, SR70c, SR110, SR110SIME, SR110A1, SR125A1, SR125, SR125SIME, SR125A, SR125B2, SR125E , TTR, ToaTao 110 , Tao Tao ATK125 go kart, Taotao ATD90A ATD125C DB10 DB14, coolster 70cc , kazuma 110, apollo RZF 125cc, apollo 70cc db 21, apollo 125 db 007, Coolster 125, coolster when-210 70cc, x-pro db-x20 125 pit bike, TTR 125, Baja DR49, Baja 70cc, SDG 107, Motovox MVX70 Pit Bike, pitster pro 90 ss [Size] Mounting Hole Distance: 28mm / 1.1 inches, Length : 255 mm / 10.04 inches, width : 84 mm / 3.31 inches. [Package Contents:]1 x Exhaust Muffler, 1 x metal clip,