Yamaha 125 Tian Jian is now accelerating slowly. Is it because the car is aging or the clutch? It's a little slippery, but it's not easy to change. Now I've run more than 20 thousand

1, slow acceleration, clutch slipping. When refueling, the engine should be at full power. If the afterburner doesn't work, check the compression of the cylinder to see if there is a bad seal and air leakage. It's very cold now, so the engine must be warmed up. The oiler adjusted in summer may not work well in winter. Re-adjust carburetor mixer and oil needle.