The 1998-2003 Yamaha YZF-R1 sportbike repair manual by Clymer, covers all models indicated.
Book Excerpt: 1998-2003 Yamaha YZF-R1 Repair Manual ELECTRICAL SYSTEM

This chapter contains service and test procedures for the electrical systems/components. Refer to Tables 1-10 at the end of the chapter for specifications.
ELECTRICAL COMPONENT REPLACEMENT Most motorcycle dealerships are parts suppliers will not accept the return of any electrical part. If you cannot determine the exact cause of any electrical system malfunction, have a Yamaha dealership retest that specific system to verify your test results. If you purchase a new electrical component(s), install it, and then find that the system still does not work properly, you will probably not be able to return the unit for a refund. Consider any test results carefully before replacing a component that tests only slightly out of specification, especially resistance. A number of variables can affect test results dramatically. These include the testing meter's internal circuitry, ambient temperature and conditions under which the machine has been operated. All instructions and specifications have been checked for accuracy; however, successful test results depend to a great extent upon individual accuracy.

COOLING SYSTEM

This chapter describes the repair and replacement of cooling system components. Table 1 and Table 2 at the end of the chapter list cooling system specifications. For electrical test procedures, refer to Chapter Ten. For routine cooling system maintenance, refer to Chapter Three.
COOLING SYSTEM INSPECTION The cooling system consists of the radiator, water pump, radiator cap, thermostat, electric cooling fan and coolant reserve tank. WARNING: Do not remove the radiator cap (Figure 1) when the engine is hot. The coolant is very hot and is under pressure. Severe scalding could result if the coolant contacts skin. It is important to keep the coolant level to the FULL mark on the coolant reserve tank. Refer to Figure 2 for 1998-2001 models or A, Figure 3 for 2002-2003 models.

1. Check the level with the engine at normal operating temperature and the motorcycle held upright.
2. If the level is low, remove the reservoir tank cap and add coolant to the reserve tank, not to the radiator. Refer to Figure 4 for 1998-2001 models or Figure 5 for 2002-2003 models.
3. Check the coolant hoses and clamps for looseness or damage.
4. Start the engine and allow it to idle. If steam is observed at the muffler, a head gasket might be damaged. If enough coolant leaks into the cylinder, the cylinder could hydrolock, thus preventing the engine from being cranked.

Subject: 1998, 1999, 2000, 2001, 2002, 2003 Yamaha YZF-R1 service, maintenance, repair. ISBN-10: 0892878924 | ISBN-13: 9780892878925 | Clymer M398