ENGI NE TUNE·UP - Init ial Idl e Speed 2 -13 Fig. 2-44 LEAN DROP IDLE (Only for USA and ECE) Idle Mi xture Speed 1. Set to the maxi mum speed by t urnin g the 600 idle mix ture adjusting screw . 2. Set to the idle mi xt ure speed by turning the idle speed adjusti ng screw. 3. Keep on repeating the adjustments (1) and (2) until th e maxi mu m speed will not rise any fu rth er no matter how much the idl e mi xtur e adjusting screw is adjusted before moving to th e nex t step. Only for ECE ... .•. Only for USA Idle mixture speed 690 rpm For USA 675 rpm For ECE Fig. 2-45 Init ial Idle Speed 4. Set to the init ial idle speed by screw ing 600 in the idl e mixtu re adjusting screw .
Initial idle speed 650 ± 50 rpm Fig. 2·46 Check if the engin e returns to idle speed ~ 5 . when sudd enly and slowly accelerated. 600 Fig. 2·47 Check the engine condi ti on. ~ 6 . Opening throttl e valve gradually should cause engine to speed up smoothly in relation to amo unt of valve opening.