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Click here for installation instructions 12V dynamo system VAPE: Dynamo System 70 80 499 0XX

The width of rims can be measured in 2 different ways: the inside or the outside. This means that one and the same rim can be indicated both in (for example) 2.15 “and 3.08″ WM2: inside 1.85″ (47 mm) outside 2.72″ (69 mm) WM3: inside 2.15″ (55 mm) outside 3.08” (78.2 mm)      

For the correct set, check the number marked in the crankcase. The number is found near the upper engine mount, see following examples: In some cases, when the engine has had a long service life, it may need a different gear set number to get the required 0.02 mm clearance. However, this can only be determined through an accurate measurement.   The 30° gear set can be used to replace the 20° gear set on all 1950 to 1963 models. This requires following additional parts: › part nr. 11410052156 – oilpump gear 30° Only for crankshaft with 17 mm taper: › part nr. 11310016400 – 1.5
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These posters are only shown for information. We do not sell these posters. We welcome BMW posters from the pre-69 era.  Mail us at  info@salisparts.com    

The R50 – R69S dual cable throttle assembly cannot be simply converted to a R26, R27 single cable throttle assembly by replacing the cam & chain and the cover. The depth of the recess in single cable cam and dual cable cams differs. The mono cam will not sit deep enough to engage with the throttle twist grip. Vice versa: the dual cable cam will not fit in the single throttle cable assembly: it’s too high.

A frequently asked question is how to fix a leakage of the idle mixing screw. Further tightening the nut of the idle mix screw is certainly not the solution: holes have been drilled in the idle mix screw which connects the idle mix chamber to the the outside air. If fuel leaks out through the same bore, it simply means that the fuel level in the float bowl is too high. (assuming that the bike is on the center stand, if the motorcycle is placed on the side stand, there is a greater risk of leakage) If the carbs keep leaking, it’s
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By Michel Loos, The Netherlands The photos are self-explanatory. Steps:  filing  – sanding – pneumatic hammer – aluminum oxide blasting (Edelkorund) – glass bead blasting  

Cylinder black with part nr. 09122 For temperatures up to 500 °C continuous use and up to 700 °C with impact load 200 ml is sufficient for 2 to 3 large cylinders. Ideal for spraying and painting engine cylinders, exhaust systems and other metal objects subject to high heat. Classic cylinder lacquer is initially thermoplastic; in other words although it is air-drying, it becomes sticky even with moderate heat, expands and hardens again when it cools down. This process is repeated as long as the polymerization temperature is not reached. The lacquer must be heated at least once to 150-180 °C to finally cure. After
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  Click this link: http://www.benchmarkworks.com/articles/tech/hardstart.html   In addition: The resistance across the two spark plug leads on the ignition coil is usually 11 – 12 K Ohm (original coils and new “made in Germany” coils). Some after-market coils have a resistance up to 20 K Ohm. When the magnetic field of the rotor is still OK, this higher resistance will not necessarily cause a problem. A weak spark at the spark plug can have different causes: a broken or poor quality ignition coil is one of them. When the insulation (schellac) within the coil is damaged (crazing), the internal windings will short circuit,
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The rear suspension pivot pins of the R26, R27 and R50 – R69S models can be adjusted with the use of the Matra 513 tool. However, no replicas are made of the Matra 513 tool. The alternative is a pin wrench such as PN 31421234399.W (Pin wrench for front fork cap screw R69US, R50/5 – R100) Although the diameter of the pins is just under 4 mm and the holes in the pivot pins are 5 mm, this tool functions well. The alternative is pin wrench 31422000243.W (Pin wrench for front fork cap screw R25/3): the pins have a diameter of just
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BING jets are stamped with numbers, such as 35, 40 (idle jets) and 110, 115, 120 etc (main jets). One would expect that these numbers refer to the diameter of the jet bore, however this is not the case. This is confimed by the company BING in Germany. A few examples of main jets measured with a wire / jet gauge: BING 44-051 main jet 130 = gauge 120 (= 1.2 mm) main jet 125 = gauge 110 (= 1.1 mm) main jet 120 = gauge 105 (= 1.05 mm) main jet 110 = gauge 95 (=0.95 mm)            
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The Bing carburetors used on the R51/3 to R69S models came with 3 different flanges. We sometimes get the question: can I put carburetor X on BMW model Y? In theory you can put an R51/3 carburetor on a R69 engine and even get the engine running, but you will quickly discover that the air pipes won’t fit. These images are self explanatory   Modified carburetors can be found in the market that fit the R68, R69 and R69S cylinder heads. However, there are some differences from the original models, most notably the carburetor flange:              
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