2001 YAMAHA YFM400F Owners Manual

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Carburetor adjustment
The carburetor is a vital part of the engine and
requires very sophisticated adjustment.

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Réglage de carburateur
Le carburateur est une pièce vitale du moteur et il exige
un réglage très précis.

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Idle speed adjustmentNOTE:A diagnostic tachometer must be used for thisprocedure.
1. Start the engine and warm

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Réglage du ralentiN.B.:Le recours à un compte-tours est indispensable pour me-ner à bien ce travail.
1. Met

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Valve clearance adjustment
The correct valve clearance changes with use,
resulting in improper fuel/air supply

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Réglage du jeu des soupapes
L’usure augmente progressivement le jeu des soupapes,
ce qui dérègle l’alim

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Throttle lever adjustmentNOTE:Adjust the engine idling speed before adjust-ing the throttle lever free play.
1