What are the reasons for the lack of power in the Great Earth Eagle King 250 at high speeds?

[OMolly]

There are several main reasons for the lack of power in the Great Earth Eagle King 250 at high speeds. Poor contact of the ignition switch: This can cause irregular ignition, and the possibility of a faulty ignition coil cannot be ruled out. Drive belt: Check if the drive belt has become too long, causing slippage. The variator weights and belt pulley may also be worn. Blockage: If the air filter or exhaust pipe is blocked, insufficient air intake and exhaust can also lead to a lack of power. Abnormal switch: An abnormal fuel tank vacuum switch can cause poor fuel delivery. Wear: If the camshaft and valve rocker arms are worn, it can lead to irregular air intake and exhaust. Air in the fuel line: If there is air in the fuel line, the fuel supply may become intermittent when going uphill due to fuel tank movement.