Why can't the motorcycle throttle up?
1 Answers
The reasons why a motorcycle can't throttle up are as follows: 1. Lean air-fuel mixture: There are many causes for a lean mixture, mainly including: the fuel needle adjusted too low; the fuel level set too low; partial blockage of the main jet; loose carburetor connection causing air leaks; air filter not installed; insufficient fuel supply from the tank fuel switch. 2. Poor crankshaft case sealing in a two-stroke engine: failure of the crankshaft oil seal on the generator side causing air leaks; leakage at the crankshaft case seam joint; air leaks at the joint between the crankshaft case and cylinder or incorrect piston installation direction. 3. Reed valve issues in a two-stroke engine: damaged reed valve; reverse installation of the rotary valve, causing carburetor backfire.