Motor Core with Nylon Gears for ARCHON/VIPER

we recommend that you check out our official YouTube channel: https://www.youtube.com/playlist?list=PL-N4duT6SfAb6eoCDQb3DDd1Xtiqlaqm5. We regularly update the channel with installation and maintenance videos that may provide you with helpful guidance.
Additionally, If you encounter any difficulties during the installation process, please feel free to contact our customer support team at ask@senadabikes.com. Our team is dedicated to assisting you.

For bike repairs, we suggest you send us some photos or videos showing the exact problem first. Our technical team will assist you to figure out the exact problem and provide assistance by then.

You can find our dealers' information from this link: https://senadabikes.com/pages/find-dealer. Alternatively, you can also make an appointment with Velotooler: https://velotooler.com/ (Remember to check the service fee before you make the appointment).

Many factors can cause fast battery drain, including high-speed riding, frequent use of the highest assist level, cold weather, tire pressure, and excessive weight on the bike. To improve battery life, consider adjusting your riding habits and maintaining your eBike regularly.

Signs of a potentially bad eBike battery include a significant decrease in range, reduced capacity, slower charging, or sudden drops in power during rides. If you suspect there is an issue, we recommend contacting our support team at ask@senadabikes.com for assistance.

No, the 20Ah battery is bigger than the 17.5Ah battery, plus the battery bracket is not the same as well. Therefore, they are not interchangeable.