What is the reason for the difficulty in starting a fuel-injected motorcycle when cold?
2 Answers
The reason for the difficulty in starting a fuel-injected motorcycle when cold is the presence of a gap between the valve guide and the cylinder head assembly, which causes air leakage in the cylinder, making it hard to start when cold. Once the engine warms up, the gap between the guide and the cylinder head disappears due to thermal expansion, allowing the engine to function normally. Introduction to fuel-injected motorcycles is as follows: A fuel-injected motorcycle is a new type of motorcycle that uses a microcomputer to control the fuel injector to supply fuel to the cylinders that need to work based on the engine load, while not supplying fuel to the cylinders that are not in operation. Compared to traditional carburetor motorcycles, fuel-injected motorcycles are more fuel-efficient, saving over 20% more fuel than their carburetor counterparts.
I've been riding motorcycles for many years, and cold starts can be problematic, which is quite common. The primary reasons are battery aging or insufficient charging, leading to inadequate power for the starter motor to turn. Additionally, the fuel pump struggles to deliver fuel efficiently in cold temperatures, as cold gasoline is more viscous, resulting in inaccurate injection. Severe carbon buildup on spark plugs can also affect ignition. Moreover, a dirty air filter or clogged fuel injectors can disrupt the air-fuel mixture, making the engine work harder. If the bike sits idle in cold weather for extended periods, it's advisable to regularly check the battery health and replace spark plugs or clean fuel injectors during seasonal changes to prevent many issues.
