Giant Stance E+ 2 (2022) – Clicking/Cracking Noise From SyncDrive Sport Motor Under Load

[besimsh]

Hi everyone,

I own a Giant Stance E+ 2 (2022) with a SyncDrive Sport (Yamaha) motor and approximately 3,800 km on it.

Recently I started noticing a clicking/cracking noise coming from the motor area. The noise only occurs when the motor is ON and providing assistance.

Symptoms:

• Giant Stance E+ 2 (2022)
• SyncDrive Sport motor
• ~3,800 km
• Noise only when the motor is ON
• No noise at all when the motor is OFF
• The noise starts as soon as I sit on the bike and apply pressure to the pedals
• It is present in all assist modes (Eco, Tour, Power)
• The noise is most noticeable between 0–10 km/h
• Above ~10 km/h it becomes very difficult to hear or disappears
• The noise seems to come from the motor area rather than the rear wheel
• No noticeable loss of power

I have a video showing the issue.

Has anyone experienced something similar with a SyncDrive Sport / Yamaha motor? Could this be related to the motor mounting bolts, chainring lockring, sprag clutch, or an internal reduction gear?

Any advice would be greatly appreciated.

Thank you.