How to Increase Air Intake for Motorcycles?
3 Answers
Motorcycle increasing air intake method is modifying with a mushroom head. Introduction to Motorcycles: Motorcycle, driven by a gasoline engine, is a two-wheeled or three-wheeled vehicle steered by handlebars to control the front wheel. It is lightweight, flexible, fast, and widely used for patrol, passenger and cargo transportation, as well as a sports equipment. Broadly speaking, motorcycles are divided into street bikes, road racing motorcycles, off-road motorcycles, cruisers, touring bikes, etc. Composition of Motorcycles: Motorcycles consist of five parts: engine, transmission system, running gear, steering, braking system, and electrical instrumentation equipment. The overall structure and names of components of motorcycles.
I think the most basic way to modify motorcycle intake is to replace it with a high-flow air filter. Take my CB400 for example - I swapped the stock foam filter for a K&N high-flow version, which directly increased air intake by 15%. But you need to clean it frequently to avoid clogging. You can also remove the airbox baffle, but be careful not to create large gaps. For even greater airflow, you'll need to enlarge the throttle body bore. I once saw a repair shop use a specialized reamer to expand the throttle body by 2mm, which required a modified ECU tune to match the new airflow - otherwise the engine would struggle to breathe. After any modifications, always test with an air-fuel ratio gauge to prevent lean mixtures that could damage the engine.
Last year, while helping a friend modify a scooter, I tried several methods. The simplest was upgrading the intake pipe to a smooth-walled silicone hose to reduce airflow resistance, paired with replacing the air filter with a mushroom-style one for better cold air intake. However, a dust cover must be installed to prevent water absorption during rain. For a more thorough modification, consider installing an independent intake system with an external air collector box mounted on the frame, though this will occupy under-seat storage space. Remember, increasing intake must be synchronized with adjusting the fuel supply system—I've seen unmatched setups cause sparking from the exhaust pipe. During disassembly, avoid forcefully pulling rubber seals, as damaged ones can lead to air leaks.
