Category: Service Bulletin

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…

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0 0 () ~————-r—————,r——-\ (-\ Tech.Cust.Service vs-201 ga/LP/tm Motorcycles R50/5 – 75/5 Group ll: Engine Munich, July ’73 4/73 (082M) e Re£: Automatic centrifugal advance Dear Sirs, It has repeatedly occurred that the M6 nut securing the centrifugal advance unit is torn ott as a result of over-tightening. Since it is not immediately apparent that this nut is cadmium-plated (M6 DIN 934-8 CD), a tightening torque of 0.6 – 0,7 mkp (4,3 – 5,l tt/lb) is specified, Please observe this torque figure to obviate further complaints. Yours faithfully, BAYERISCHEM 0T0RENW ERKE Aktiengesellschaft ,,;- ppa. _…./’N . a- • ( Kennt~is…

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u ( Tech.Cust.Service vs-201 ga/LP/fm Motorcycles R50/5, 60/5, 75/5 Group 11: Engine Munich, June ’73 No. 1/73 (073M) e Ref: Engine with lower compression – BMW R50/5 – R75/5 Dear Sirs, To prevent the occurrence of “pinking” in countries with low octane fuel, our motorcycle models /5 are now available (since January ’73) with engines having a lower compression figure. They can be ordered at the same price as normal models quoting the Code No. 45.l. The lower compression is obtained by using a cylinder base gasket 1.2 mm in thickness. This reduces the compression as follows: R60/5 R75/5 from…

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u Service-Information6 \ Tech.Cust. Service Munich, Dec ’72 VS-201 na/zr/fm Motorcycles R50/5 – R75/5 Group: Engine 1 o- 1/73 (056 M) e Ref: New automatic centrifugal advance Dear Sirs, With the installation of a new automatic centrifugal advance unit on the models R 50/5 as of Chassis No. 2 905 857 R 60/5 as of Chassis No. 2 946 096 R 75/5 as of Chassis No. 2 996 220 the tendency to “knocking 11 of the engines has been reduced so that even fewer problems will be encountered in countries with a lowquality fuel. The centrifugal advance curve rises flatter…

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( ·service-InformatioGn Tech.Cust.Service VS 201 LP/sta/fm Motorcycles R50/5, R60/5 R75/5 Group: Engine Ref: Rocker arm bearing supports Dear Sirs, Munich, Nov 72 5/72(043 M) e To suppressnoise which can occur if there is too much play on the rocker arm, slotted rocker arm bearing supports (Order No. 11 12 l 250.?37) used in conjunction with a hardened thrust washer (Order No. 11 33 1 257 825) have been introduced in series production upwards of Chassis No. 2 904 721 for the model R 50/5 ti II 2 942 632 If ,, Tl R 60/5 ” IT 2 989 472 ”…

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Tech.Customer Service VS 201 gi/Zr/fm Motorcycle R50/5, R60/5, R75/5 . \ Munich, Nov 72 4/72 (041 M)e Group: Engine Ref: Automatic ignition timing mechanism (centrifugal advance) Dear Sirs, In order to obtain for all three motorcycle models optimal performance points in the ignition advance, we have installed a new automatic ignition mechanism as follows: R 50/5 upwards of Chassis No. 2 901 787 R 60/5 upwards of Chassis No. 2 932 689 R 75/5 upwards of Chassis No. 2 973 307, Bo•ch No. (identification mark) previous,1utomaticti ming mechanism 023 202 005 newa utomatict iming mech.:rnism new automatic timing mechanismw ith…

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I Service-Informati$o n (‘ ,.,,,,.,.,._.,-rr,;–…=-~e”r”v–1r.c.:e;;–==o:;;r”‘c”‘y”cc,-;e”s.-,=-“f”T,,-cr7’7,=——-,M”M=:::n:::a:c-:1;:rr:-::c::c:-c.h::.h:-:,- —.;gi/mi R 5/5 3 72 (006 m)e G oup: engine – crankshaft Ref: Crankshaft Dear Sirs, In order to reduce the possibility of damage to the drive when the engine is greatly overloaded the fatigue strength of the crankshaft under repeated bending stress has been increased at the following models R 50/5 upwards of chassis no. 2 964 190 R 60/5 upwards of chassis no. 2 940 740 R 75/5 upwards of chassis no. 2 985 208 by taking the following steps. 1. Change over to different material, from CK 45 N to 41 CR4…

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I~. .. I ~ Service-Information$ \.✓ Tech. Cust. Service VS-201 gi/mi Motorcycles R50/5,R60/5,R75/ Munich, March 7 2/72 (005 M) e l r. r . I Group: engine En ine oil r · Rer: Engine oil recommendations Dear Sirs, A renewed revision of the engine oil recommendations leads to the following results: ·.oil changien tarval Throughotuhta year every 4 000 ■ilea, after 6 monthast tha latest . extemal tnps 0 ‘ .■ainly above+ )’) C all.tht0year round above0 C aainlyb elov0 ° C Oil brands BrandeIdI) oil1 for Ottot nlJint• Single,.gradt llultl-gra~• oil■ oib $A£4 0 SAE2 0 V 50 ·SAE2…

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( Service-Informati&on VS-201 ervice fm/na o orcycle R 75/5 Group: engine Constant Pressure Carb Munich, March 7 1/72 (003 M) e Ref: Constant-Pressure Carburettors 64/32/3 and 64/32/4 Dear Sirs, The improved idling performance of motorcycles equipped with carburettors 64/32/9 and /10 (as described in the Service Information bulletin 5/71 can also be obtained in the majority of c~ses by limiting the displacement of the vacuum piston of-carburettor types 64/32/3 and /4, In order to limit the displacement of the piston insert a cheese head screw M 2 with a 0.0~” head at the bottom of the vacuum piston. Secure with…

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Service-Information& Group: 11 September Bulletin No.: Engine 1981 11 020 81 (2039) – For U.S.A. and Canada Only – Subject: Maintenance of Emission Control Systems – 1982 Models Applicable emission standards for the 1982 motorcycles amount to 5 g/km HC and 12 g/km CO. No maintenance is required for the pulse air system, which ensures the above emission values. Idle speed and idle mixture adjustment does not differ from the 1980 model procedure (Bulletin 11 012 79 (2006), All 1982 model motorcycles .are equipped}.with. an’:el’ectronic ignition system without breaker points. •• ·Misatj.’.justment by wear and tear is impossible. Ignition·,timing must·.::be…

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