... years. We were gold supplier in alibaba for 7 years. Looking forward to your inqiury of our product. We acceptting of customization order ... Speedhandle,brake handle,power lock,display,converter,horn,flasher,alarm, failure within three months because of the quality,and still can ... the instructions of the use, maintenance and adjustments caused failure.2: Damage caused by self-repair, and modification.3 ...