What are the reasons for a motorcycle's throttle not responding when cold?

[VonLondyn]

There are several reasons why a motorcycle's throttle may not respond when cold: 1. High oil viscosity: The motorcycle's air filter may be dirty and need cleaning or replacement, incorrect starting method, improper carburetor adjustment, decreased engine performance, severe wear of internal engine components, especially in areas such as the cylinder, piston, piston rings, valves, and rocker arms. 2. Spark plug failure: The spark plug may have degraded over time, leading to performance issues. 3. Weather conditions: In winter, the cold weather can make it difficult to start the engine. In warmer southern climates, unless there is a fault with the motorcycle itself, starting issues are unlikely. In northeastern regions during early spring or late autumn when temperatures drop below 0 degrees Celsius in the morning, the oil may thicken, causing starting difficulties.