Why is the front brake of the motorcycle too hard to squeeze?

[AsherAnn]

Here are the reasons why the front brake of the motorcycle is too hard to squeeze: 1. The first reason: Dirt accumulated over long-term use in the oil pump and oil pipe blocks the inside; there is a layer of dirt accumulated in the upper pump, even clogging the exhaust hole and oil supply hole, or the oil pipe is blocked at the downward passage or the oil pump oil path is obstructed. 2. The second reason: The piston in the upper pump does not rebound flexibly due to rust, or there is air in the oil pipe causing swelling, leading to poor flow. Here are extended solutions: 1. Check the exhaust hole: Check if there is oil overflowing from the exhaust hole below. Use a ten-sized open-end or socket wrench to loosen the exhaust valve below while simultaneously squeezing the brake lever by 1/5 with the other hand. Observe if oil flows out. If not, it indicates that the oil pipe or the oil hole of the exhaust valve is blocked. 2. Check the exhaust valve: Inspect if the hole of the exhaust valve is blocked. Spray rust remover from the other end of the hole to clear it, then reinstall it to the lower pump.