Noisy Giant / Yamaha SynchDrive

HBrook78

Member
I have a 2018 Giant Explore e+3 with about 6K miles on it. It has a Yamaha SynchDrive. Today, the drive started making noises that sound like a bearing is failing. Full symptoms:
- Noise is like 3 or 4 BBs rattling in a water bottle with occasional louder pops
- Volume of noise is proportional to the amount of torque the drive is providing
- No noise when coasting
- I can make the noise come and go…for example, if I am going slightly down grade in 5th gear and pedaling gently in “normal” assist setting, no assist is delivered and there is no noise. If I pedal harder and the display shows assist being delivered, the noise appears. If I reduce my pedaling effort, the noise goes away again.

Has anyone here had a similar experience? I’m taking it to my Giant dealer tomorrow but I always prefer to have a good idea what to expect.

TIA.
 
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