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669 (First number in the series) = The length of the belt in millimeters.
18 (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.
This is a standard replacement belt for the GY6 50cc 139QMB 4-stroke short-case engine. This belt is found on the is used on the Baja, JMstar, Jonway, Lance, NST, Peace, Roketa, Sunl, Tank, TNG, Vento, VIP and many others. Note: Scooters with a 10" rear wheel usually have a short case engine.
supported the Brands of BAOTIAN, BASHAN, BENZHOU, CFMOTOR, CHARMING, DAYANG, DINLI, FUXIN, GEELY, GILERA, HANGLONG, HAOJIN, HAOJUE, HISUN, 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.
Much better quality than 65386.
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* Piston: 57mm * Piston Pin: 15mm * Piston...
SmartLinkLength: 835mm (32.87...
Maximum Diameter: 52mm /Minimum Diameter: 47mm
The diameter is 5.4mm. 10 pcs
* 12v 10w * PACK of 10
QMB139 50mm Piston Kit Piston Outer...
1x Starter Motor with wire. 12 Volt. CW...
# Valve Diameter: 20mm / 23mm # Length: 65.5mm...
Outer Diameter: 90mm (about 3 inches) / Inner...