| Size | 39mm bore cylinder piston kit | |||
| Fit Model | Replacement for GY6 4 stroke 50cc 139qmb engine(read description for detailed fitment info) | |||
| Premium Quality | Professional manufacturing,use high quality material,give you a better user experience. Reliable and durable for long time use. |
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| Easy Installation | Simple installation steps,easy to replace the old one,practical and convenient to use. | |||
| Reminder / Note | To make sure you are buying the right product, please read the product description carefully or image size. If you have any problems or need help, welcome to contact us before or after your purchase. We will do our best to help you to solve it. |
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