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Adjusting Service Headlamp

To get the greatest efficiency from headlamp and to meet the reąuirements of law, adjust as follows: Adjustment should be madę in a darkened room or at night. Have motorcycle standing on a level sur-face about 25 feet away from, and headed toward a wali or screen upon which a horizontal linę has been drawn at exactly the same height as lamp center. Motorcycle must be resting on both wheels and front wheel must be in straight-ahead alignment.

Tum light switch “ON/' set handlebar thumb switch in “bright" position, and check light beam for height and direction. The top of main beam of light should register on wali or screen even with, but no higher than the horizontal linę mentioned. After loosening the clamp nut undemeath lamp bracket, lamp can be tilted up or down to properly aim it in relation to horizontal linę, and at the same time can be turned right or left to direct beam of light straight ahead.

Lamp Bulbs

Harley-Davidson

1940 and lat er	Contact	C.P.	Mazda Number	Part Number
Serviće headlamp—Pre-focused..........	.......... D.C.	32-21	2320L	4925-35
Blackout marker lamp..................	.......... S.C.	3	63	4927-15
Speedometer lamp .....................	.......... S.C.	3	63	4927-15
Generator signal lamp .................	.......... S.C.	3	63	4927-15
Oil pressure signal lamp................	.......... S.C.	3	63	4927-15
1941—
Service stop and taił lamp...............	.......... D.C.	21-3	1158	5058-34
Blackout stop lamp.....................	.......... S.C.	3	63	4927-15
Blackout taił lamp......................	.......... S.C.	3	63	4927-15
1942 and lat er (bulb units) Service stop and taił lamp..............	.......... D.C.	21-3	Guide Number 5933104	5077-42MB
Blackout stop lamp.....................	.......... S.C.	3	5933121	5077-42MA
Blackout taił lamp (2)...................	.......... S.C.	3	5933078	5077-42M
Blackout headlamp.....................			5934473	4909-42

CARBURETOR SERYICE

The following Model "M“ Linkert carburetors are used on Military motorcycles: M-64, M-65, M-84, M-88, M-90, M-97 and M-641. Model numbers are stamped on top of carburetor.

M-64 and M-65 models have extemal or outside nozzle and bowl vents; air bleed to nozzle and bowl are from external holes drilled in body casting. These two models are exactly alike except that one has a different size fixed high speed jet than the other. (See “Carburetor Specifications," Page 61). These two models are used with a standard (not oil bath) air cleaner.

M-84 model has internal vent in the form of a tubę extending back of venturi and pointing into air stream. This vent supplies the air bleed to nozzle. Bowl is vented through hole drilled in body and opening extemally. This model is used with oil bath air cleaner and is equipped with fixed high speed jet (See “Carburetor Specifications," Page 61).

M-88 model has internal vent to nozzle in the form of a slot cut in lower side of venturi on air intake end. Bowl vent is extemal and same as in M-64, M-65 and M-84. This model is eąuipped with fixed high speed jet (See "Carburetor Specifications," Page 61)

and is used with oil bath crir cleaner.

M-90 model has internal vent to nozzle in the form of a slot cut in lower side of venturi on car intake end. Bowl vent is extemal and same as in. M-64, M-65, M-84 and M-88. This model is eąuipped with fixed high speed jet (See “Carburetor Specifications," Page 61) and is used with oil bath air cleaner. Bowl on M-90 model is different than on M-64, M-65, M-84 and M-88 in that this bowl uses a special gasket between upper edge of bowl and lower face of body. This gasket must always be located in its proper place to seal bowl to the body. Use a new gasket if old one is the least damaged or defective. If gasket is not properly located, gctsoline leakage at bowl will result.

M-97 model has internal vent in the form of a tubę extending into air stream and back of venturi. This vent supplies both the crir bleed for the nozzle and the vent for the bowl. There are no extemal vents on this model. Special bowl gasket between the upper edge of bowl and lower face of the body must always be properly located and in place to seal bowl to the body. Use a new gasket if the old one is the least damaged or defective. If this gasket is not

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