Interests ::

Bing Carburetors [Bing Vergaser] - BMW R51/3




Bing Vergaser :: 1/26/85 and 1/26/86. (SLN)

1. suction channel
2. air passages
3. idling jet
4. plug
5. needle
6. piston slide
7. throttle
8. cap
9. filter connection / mixing chamber cap
10. tapered needle
11. needle jet
12. main jet
13. hose connection
14. tickler
15. float chamber
17. damper ring
18. plug
19. air adjusting screw
20. valve adjusting screw

Description

Bing Carburettors with 26mm passage. Piston slide carburettors with the float chamber cast instegral with the carburettor housing. Arranged at an angle of 15? from the vertical position and are flanged to the engine (1). They have a system of jets, the main jet being provited with a needle control, operated by a piston slide. A compensating chamber serves to maintain a proper fuel mixture compensating the effects of a lowered level in the float chamber produced by the action of centrifugal force when riding through curves.

Detailed drawing :: [>>]

Operation

The fuel entering the float chamber (15) through the hose connection (13) arranged on top is kept at a constant level by the float mechanism. The float is provided with a damper ring (17) to avoid irregular flow due to vibrations or shocks. The level in the float chamber can be raised for a short period when starting the engine by depressing the ticker (14) so as to provide a richer mixture. From the float chamber the fuel passes through passages in the plug (18) to the main jet (12) and the idling jet (3). The main jet (12) is fitted into a needle controlled jet (11). The fuel flows through the annular space around the tapered needle (10) to the mixing chamber cap (9), the annular space being varied by raising or lowering the needle. The air coming from the filter connection (9) passes the cap and produces a preliminary atomization at the jet opening, while the main air current passing the upper porting of the bevelled top of the cap(8), effects a complete atomization before the mixture enters the combustion chamber of the engine.

This arrangement with the jet opening controlled by the needle (10) and the latter operated by the piston slide (6) insures a uniform ratio of fuel and air, both for the lower and higher speed ranges of the engine.

The fuel drawn in through the detachable idling jet arranged above the plug (4) is mixed with air entering through the filter connection and the idling air passages (2) and passes into suction channel directly behind the piston slide.

Coarse adjustment of the idling speed is made by means of teh air adjusting screw (19). Turnining in produces a richer mixture, turning out a leaner mixture.

Adjust each carburettor individually to the same idling speed; when doing so, remove cable from spark plug of opposite cylinder.

Tuning Manual Data ::

replacement for	1/26/9
engine model	linker Vergaser
	R68 R69
stroke	4
cylinder
displacement	60
carburettor body	13-241-26-01
motor flange	Flansch
filter connection	35
cover plate	20-351
screw cover	21-542
slide	22-531
float chamber	fest rechts
cover for float chamber	32-310-112
fuel connector	8
float	35-072
slide adjusting screw	50-085/60-280 links
main jet	44-051/115
pilot jet	44-031/35
needle jet / mixing tube	45-251/1208
jet needle	46-934 (Nr.4)
position (jet needle)	1
float needle	47-965
tipper	48-971
air regulation jet	50-920
open	1 1/2 x
atomizer	51-570
additional information	Gummidichtring 65-730, Dichtung 65-540, 2x 40-528 mit 61-680, 50-250.
	Abdeckschraube 50-203 mit 65-244.

 

Links ::

• Bing carburetors [1-2]

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