| 摘要 |
PROBLEM TO BE SOLVED: To reduce intake noises by increasing the capacity of a clean side air chamber, and to utilize the air in an auxiliary air chamber when response is improved by rapid opening for challenging the response of an engine, that is, a large quantity of air is needed in a short period. SOLUTION: An air cleaner element 52 is mounted to a ceiling 59 of a dirty side air chamber 61, the clean side air chamber 62 is arranged above and behind the dirty side air chamber 61, the auxiliary air chamber 63 is disposed under the dirty side air chamber 61, and the auxiliary air chamber 63 is allowed to communicate with the clean side air chamber 62.
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