Transmission problems
Honda Lead 100 from 2003 odometer is 43.000km
Lately, I’ve been hearing strange noises coming from the transmission area. It’s a mix of a rattling, slapping, and sometimes a squealing sound, especially when accelerating or at idle. For example, if you open the throttle a little and then let off the throttle, it sounds a bit like sand is flying around inside the variator cover. When you're riding the scooter at 60 km/h, you hear a loud grinding noise. The problem started all of a sudden.
I‘ve changed the transmission oil which didn’t seem to have an advantage.
I took off the transmission cover to check it out. The inside was quite dirty and dusty. I did a rough cleanup and sprayed some WD-40 around the area/cover to clean things up and loosen up any stuck parts. The inside of the cover was dirty in a back kind of dirt that looked like old coal.
Surprisingly, after doing this, the noise got significantly better especially the one appearing after surpassing 60kmh.