Rear brake Drum brake 139qm/GY6

Hello, I have a few questions about the rear brake on the 4-stroke China scooters. And I’m surprised to hear about the release of oil on the brake cam. On the pictures are my two scooters. The first is oilier, but has the much higher braking power on the rear wheel. The second vice versa. The oil outlet can actually only be from the Simmerring of the gearbox output shaft? But with the running performance they can hardly be over. Especially since I think that from Anfa The next question: How is the brake wear indicator interpreted in this model? With my old 2T-Rex, there was a “scale” in which the metal arrow moved. Is there a failure here. And finally, the most important thing: how can I adjust the brake even bit more? Is this only possible above the tensioner on the rope hoist? Hydraulic brakes don’t give me any puzzles, but this rope puller doesn’t want the way I want to. Is this mechanical brake also to be at least close to the blocking limit? I am at the limit with the rear tensioner on the rope train. Half-turn further grinds the brake!