What's the matter with Yamaha motorcycle starting without accelerator?

Throttle wire drawing failure, carburetor throttle needle falling off, carburetor main nozzle blocked, and water at the bottom of carburetor float chamber. Inspection and maintenance can be solved.

Check the oil circuit. Is it possible that the tank cover is not well ventilated and there is a vacuum? The oil is too slow.

The oil circuit block is a collection of dispersed hydraulic circuits. The oil circuit block is only a block that controls the operation of hydraulic oil. Usually made of metal. For each hydraulic system, the oil circuit block needs to be designed separately according to the hydraulic schematic diagram. Its advantage is that it simplifies the installation, overhaul, replacement and later maintenance of the hydraulic system. The disadvantage is that the design and processing requirements are high and the cost of a single piece is high. Not suitable for single piece and small batch production.