http://www.mortchmotor.com

743 (First number in the series) = The length of the belt in millimeters.
20 (Second number in the series) = The width of the belt in millimeters.
30 (Third number in the series) = The angle of the teeth on the belt.

743-20-30 scooter CVT belt. Typically works on most 125cc-150cc 4-stroke GY6 scooter engines with 12 inch rims. Also works on many ATVs, dirt bikes and go-karts.

Also fits below bikes,

KYMCO 125Movie(98/00) 23100-KEB8-0000
KYMCO 125/150 Heroism(95/>) 23100-KEB8-0000
KYMCO 125/150 Vivio(00) 23100-KEB8-0000
SYM 125New Duke 23100-KFB8-000
SYM 125Super Duke 23100-KFB8-000

One Box packed with 124pcs.
Mortch Motor parts supported the Brands of BAOTIAN, BASHAN, BENZHOU, CFMOTOR, CHARMING, DAYANG, DINLI, FUXIN, GEELY, GILERA, HANGLONG, HAOJIN, HAOJUE, HONGZHOU, HUATIAN, JIAJUE, JIANSHE, JINLUN, JMSTAR, JONWAY, KAITONG, KEEWAY, KINROAD, KYMCO, LIFAN, LINGBEN, LINGTIAN, LINHAI, LINTEX, LONCIN, LONGJIA, MAWI, MEIDUO, MOTORRO, PIAGGIO, QINGQI, RHON, RIEJU, SACHS, SHINERAY, SKYGO, SUKIDA, TAOTAO, VESPA, VONROAD, WANGYE, WONJAN, XINGYUE, XINLING, XINTIAN, YIBEN, YINGANG, ZHONGYU, ZNEN, ZONGSHEN, etc.

Note:
1. Please make sure this parts fits your particular model. Many bikes have the same name but use different parts depending on the year of manufacture.
2. The photos are for your reference only, and the goods is subject to the real product which you will receive.
3. Import duties, taxes and other customs related charges are not included. Buyers bear all responsibility for all extra charges incurred (if any).