CARBURETTERS Dismantling Carburetterseall types, (1) Thoroughly clean the outside of the carburetter. (2) Mark the relative pOSition (12) abf the suction chamber (3) and the carburetter body,(13). (3) Remove the damper (l4) and its washer (15). Un-' screw the chamber retaining serews (16).. -. (4) Lift off the chamber in the direction of arrow (17) without tilting. (5) Remove the piston-springltl). (6) Carefully lift Out the 'Lp'iSton, assembly (19) and empty the damper oil from the piston rod (20). .009 Carburettersxed needle type (7) Remove the needle locking screw (21) and with- draw the needle (22). If it cannot easily be removed, tap the needle inwards rst and then pull outwards. Do not bend the needle. (12) With both jet levers at their lowest position, set the jet interconnection lever clamp bolts (11) so that both jets commence to move simultaneously. (13) Run the engine at 1,500 r.p.m. and, using the balance meter, check that the carburetters are balanced. If they are not balanced, reset the levers, rebalance at idle speed, then recheck at 1,500 r.p.m. (14) Check, and if necessary adjust, the mixture control wire (1) to give approximately 116 in. free movement before it starts to pull on the jet levers (9). (15) Pull the mixture control knob until the linkage is about to move the carburetter jets. , (16) Using the carburetter balancing meter to ensure equal adjustment, turn the fast idle adjusting screws (4) to give the correct fast idling speed (see TUNING DATA). (17) Ret the air cleaners. Section 4-B CARBURETTER SERVICING Carburettersspring-loaded needle type (8) Remove the guide locking screw (72), withdraw the needle assembly (73), needle support guide (74) and spring (75), taking care not to bend the needle. (9) Withdraw the needle from the guide and remove the spring from the needle assembly. Carburettersall types (10) If a piston lifting pin (23) with an external spring is tted, remove the spring retaining circlip (24) and spring (25), then push the lifting pin upwards to remove it from its guide. With the concealedrspringg type (6) press the pin upwards, detachthefscirclip (26) from its upper end, and withdravthelpinuwnd; spring downwards. (.1 1) Support the moulded base of the. jet." 26) anathema (165998 the screw (27) retaining the jet pick .jlink, (28). Engine Emission. Issue 3. 16939 421 4'5