carburetor-773-990m-1173

Service-Informatio~n ~————~—————-~——-,’ ‘-. – ( Tech.Gust.Service VS-201 lo/LP/fm BMW Motorcycles R60/6 – R90S Munich, Nov ’73 Group 11: Engine 7 /73 (090 ,,l) e Ref: Carburetor Dear Sirs, It has been necessary to change several technical specifications relating to the carburetors shortly before production of the new motorcycles. These changes could not be incluaed in the first edition of the Owner’s Manual ana are now given below. R 00/6 R 75/6 R 90/6 R 90 5 carburetor type Bing, left 1/26/111 64/32/9 64/)2/11 Carburetor type Bing, right 1/26/112 64/32/10 64/)2/12 Carburetor type Dellorto, left PHMJ8 AS Carburetor type Oellorto,right PHM)8 AO Carburetor ID 26 32 )2 ;8 ~ain jet 140 135 150 155 Needle jet 2.68 2.70 2. 68 2. i,j with accel. pump ..let needle ijo. 4 46-241 46-241 K 4 Needle oosition 2 ) 1 ) Idling jet 40 45 ~5 6C Idling air jet 1 1. 2 Idling air screw/idling mixture regulating screw opening .. turns 1/4-11/4 l/2 – l 1 1 1/2 8ysoass bore 1 mm dia. 0,8 1.0 0, 7 1.4 By-pass bore 2 mm dia. 0,65 Float chamberv ent bore -?. -? Float vabe mm di2. 2.2 2.5 2. 5 1 O ,. V Float weight grams 10 13 13 lG Starting jet 50 Cl, 77 46/?C Sbrting air jet mm di.:.. 2.0 2 ,, – ,o Mixture oassage 7.0 Air passage 6.J -2- ( \__J Kenntnis genommen – Pris connaissance – Noted – Tornado nota – Presa conoscenza Ablage – Archives – File – Archive ( ‘· s.r. 7/71 (090 M) e – 2 – R 60/6 R 75/6 R 90/6 R 90 S Accel. pumo jet 0.;5 Fuel volume (sq, :m) injected per stroke 0.; Rotary valve diaphragm 65-810 65-810 Retary valve ,eight grams 102 106 Emulsion bores in rotary valve mm dia. 1.0/1.2/.07 2.0/1.2/. 7 intake air filter Onec ommo’nm icro star• dry air filter ior both c,rburetors The first production models of the type R 90/6 and R 90 Swill be supplied with carburetors differing somewhat from the above. R 90/6 Bing carburetors No. 64/32/13-14, which are identical with the carburetors on the R 75/5 model (No. 64/32/9-10), except for the following points: Main jet Needle jet Needle position R 90 S 150 2.68 1 On the Dellorto Carburetor PHM 38 A SID, a valve tickler is used instead of a choke. Yours faithfully, BAYERISCHE MOTOREN WERKE tiengesellschaft i. V. /L.-,t_ Scholz P.S. Contrary to the information given in the Owner’s Manual, the Bing Carburetors (No. 1/26/111-112) without automatic choke used on our R 60/5 models will find application on R 60/6 models until further rioti·~<'.