Understanding And Maintaining The BMW /2 Electrical System
Short summary:
Wiring Diagram Colour Cross-Reference Wiring Diagrams. Connections. Magneto. Magneto 2 (to Headlight 2) High Tension (sparkplug) leads. BMW Wiring Scheme 2.27 Ulrich Seiwert/Ulis Motorradladen Replacement Loom ...
Long summary:
Understanding And Maintaining The BMW /2 Electrical System Understanding And Maintaining The BMW /2 Electrical System by Doug Rinckes with contributions from Kees van der Heiden Understanding And Maintaining The BMW /2 Electrical System of 28 History and Copyright History Title Authors Version Year Description Understanding and Maintaining the BMW /2 Electrical System Doug Rinckes Kees van der Heiden 1.0 2002 First released version Copyright This document is copyright © 2002 by Doug Rinckes (doug.rinckes@iname.com). Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.1 or any later version published by the Free Software Foundation; with no Invariant Sections, with no Front-Cover Texts, and with no Back-Cover Texts. Understanding And Maintaining The BMW /2 Electrical System of 28 Table of Contents History and Copyright.2 History.2 Copyright.2 Introduction.4 Electrical System Overview.4 Understanding the Ignition System.5 The Magneto.5 The Points.5 The Capacitor (Condenser).5 The Coil.6 Adjusting The Spark.7 Checking the Magneto Position.7 Repositioning the Magneto Rotor.7 Setting the Timing.8 Understanding the Charging System.10 Wiring Guide.10 Maintaining the Generator.10 Maintaining the Regulator.11 Testing The Charging System.14 Test 1: No Load Voltage.14 Test 2: Cut-In Voltage.14 Test 3: Load Voltage.14 Test 4: Reverse Current.15 Look After Your Battery.15 What To Do.15 Ignition Problems.16 Weak Ignition Spring.16 Advance/Retard.16 Tutorial: How The Ignition System REALLY Works.17 What the Magneto is doing.17 Charts.18 Specifications.20 Replacement Parts.21 Wiring Diagram Colour Cross-Reference.22 Main Wiring.22 Turn Indicators.23 Wiring Diagrams.24 Connections.24 BMW Wiring Scheme 1.26 BMW Wiring Scheme 2.27 Ulrich Seiwert/Ulis Motorradladen Replacement Loom.28 Understanding And Maintaining The BMW /2 Electrical System of 28 Introduction This manual was written to help owners of /2 BMW motorcycles to service their bikes and keep them in running condition. When these motorcycles were made, they had very different electrical requirements to motorcycles today, and used equipment which todays owner may not fully understand. Doug and Kees hope that this manual is useful to owners of these motorcycles and that it will help owners keep their bikes where they belong on the road. Electrical System Overview The BMW /2 motorcycles have what could be viewed as two electrical systems one for the engine (ignition), and one for all the extras such as lights and the horn. The ignition system consists of the magneto, coil, points and the sparkplugs. The ancillary system includes all the bulbs, the battery, generator, horn, and switchgear. Because of this separation, it is possible for the engine to run quite happily despite major faults in the rest of the wiring system. Early electrical components werent very reliable, and this was a major reason why many vehicles, and ...
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