Category: Service Bulletin

L SERVINICFEO RMAllO~ Tech.Oust.Service VKT 20 gi/zr/hn Motorcycle R 75/5 group: engine Mu.nich, Dec. 1970 No. 5/70 (284) L Supplement 2 Re,: Advanced constant preseion C9rburetor Dear Sirs, The refitt.ing of the @onstant preesion carburetors of model R 75/5 until chassis No, 2 972 061, started by S.I. 5/70 (284), has not yet been effected to all engines, though enough refitting kits are available, We point out once again that all engines concerned have to be ( transformed as soon as possible and we order our field engineers to control this action. All engines have to be transformed immediately, Yours…

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Customer Service gi/Zr/Go SERVINICFEO RMAllffi Motorcycle R 75/5 Group: engine Supplement unich, Nov. 70 O, 3/70 (281)e~: Ref.: Carhurettora Dear Sirs, Messrs. Bing have altered the designation of ihe eg~ipression carburettors. Against the indication in S,I. No. 3/70 (281), in the Owner’s Manual and in the Wor’k shop Manual it muat read: carburettor Bing left side 64/32/3 carburettor Bing right stde 64/32/4 The ordering Nos. remain unaltered. Youra very truly, BAYERISCHEM OTO.REWNE RK.E Aktiengrsellachaft p_pa. .1… v. /iJ ,. I ‘ .• ‘t/ / / n ! Dellesks Benn:ewi tz Kenntnts genommen • Pris connalssance – Noted – Tomado nota…

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SERVIINCFEO RMATION 8rvice Promotion Advising on equipment problems Milnchen, Sept. 1970 KT-30 Kl/St n. 11/70 (257) en. ( Subj.: Oil pressure gauge f’or r..1otorcycles BHW R 50/5, R 6075, R 75/5 Dear Sirs, When the engines of the miot.orcycles show deficiencies which presumably result from insufficient lubricating or, after bavin~ reuaired the engine, we recommend to check the oil pressure .. For this purpose, a. commercia.l size pressure gauge with a measuring ra.nge of O – 114 or 142 psi is a.ppropiate. The pressure gauge can be connected on the blind plug M 10 x 1 below the contactor for…

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SERVINICFEO RMAllm – Techn. Cuet. Service Motorcycles R50/5,R60/5,R75/5 Group: Engine MUncb.en, Sept. 1~ VKT-20 Fm/Wi/St n. 8/70 (289) en. Subj.: Oil leakages around the chain case cover Dear Sirs, On a limited-numb~r of motorcycles the three studs to seeure tb.e chain case cever have been installed with Curil, instead of Loctite. Only on these machines it h.a.s been stated in r…avoi·a.l cases that oil leaks out, especially through th.e two upper holes of the studs . .•., . To step the trouble, remove th.e chain case cover (see ( workshop manual, pages 11-14/1) and, operating from below, apply a 2…

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L SERVINICFEO RMAllOK’ Tech.Oust.Service VKT 20 gi/zr/hn Motorcy~le R 75/5 group: engine Mu.nich, Dec. 1970 No. 5/70 (284) L Supplement 2 Re .. ~ Advanced constant prest!ion C’9rburetor Dear Sirs, The refitting of tbe eonatan.t prees1on carburetors of model R 75/5 until chassis Noe 2 972 061, started by S.I. 5/70 (284), has not yet been effected to all engines, though enough refitting kits are available. We point out once again that all engines concerned have to be ( transformed aa soon as possible and we order our field engineers to control this action. All engines have to be transformed…

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f ‘( SERVIINCFEO RMATION Techn. Customer Service Motorcycles R50/5,R60/5,R75/5 Group: Engine Mlinchen, July 1970 VKT-20 Fm/Wi/St No. 7/70 (288) en, ( \ Re: Through-bolt sleeves pressed into cylinder bead Dear Sirs, In order .to avoid oil leakages between cylinder head and through;…bol t sleeves in case of unfavorable machining tolerances, new through-bolt sleeves with. seal rings (0-ring) and spacers are now used on model R 50/5 commencing with frame No. 2 900 602 ” R 60/5 ” ” ” II 2 930 965 U R 75/5 U II II II 2 970 980 The new parts fit the three models…

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L SERVINICFEO RMAllO~ Techn.Customer Service Motorcycles R50/5, R60/5, R75/5 Group: Engine MUnchen, June 1970 VKT-20 Gi/Wi/St No. 6/70 (285) en. u Re: Engine oil specifications Dear Sirs, In conseqti-ence of comprehensive test work achieved in cooperation with the oil companies, our engine oil speci:t”ications are extended as follows: During fall, winter, and spring months (below +50°F) every 1550-miles or after no more tha.n 3 months SAE 20 SAE 10 W 30 SAE 10 W 50 (for the present from _Messrs. Mobiloil) During summer months (above 32°F) every 3000 miles or after no more than 6 months SAE 30 SAE 20…

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M (0 Customer Service V.GmbH B&S N.J Motorcycl~ R 75/5 Re: Constant Velocity Carburetor Gentlemen: Constant velocity carburetors are more critical and therefore, require that the tuning procedures are precisely followed otherwise irregular idle, poor performance, surging in mid-range and slow return to idle may occur. Tune as follows: 1. Remove and dismantle carburetor. 2. Make certain that the slide pilot sleeve has sufficient clearance in the dome bushing to allow the slide to fall freely of its own weight. The desired clearance is 0.07 mm (-.003 11 ). It is very important to have this clearance. To obtain this,…

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( Technical Customer Service VKT 20 Gi/wi=Ra Motorcycles R 50/5 Group: Engine Milnchen,April 1 70 No. 2/70 {280)en RE: Main _j_et Dear Sirs, To improve the transi:ti.on ·_ in the part-load range, the ca.rburetors of the R 50/5 model have been endowed, effective of frame No. 2 900 441, with a 135 size maln jet, ordering number 13 11 1 255 835 (former main jet size 145). Simultaneously, the needle position has changed from previous 2 to 3. In case of complaint the carburetors may be subsequently equipped with the new main jet. The settlement takes place via the usual…

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Technical Customer Service VKT 20 Gi/wi-Ra Motorcycles R 50/5,R 60/5 • Group: Engine MUnch&n,April 170 No, 1/70(279) en ‘ ) “–·’ RE: Carburetors with accelerating pump Dear Sirs, In order to improve the transition from idling to the partload range the carburetors of the R 50/5 model have been equipped with accelerating pumps quite from the beginnin$ of the standard ser.,t,al production, and that of the R 60/5 commencing with frame number 2 930 530, In case of complaint, the accelerating pump may be installed subsequently on the R 60/5 model; the complete conversion kit has the ordering number 13…

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