Yamaha YZF-R1(B) 2012 Service Manual

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Contents

CLUTCH5-637. Remove:• Clutch boss nut• Springs• Clutch boss• Pressure plate 2• Conical spring washer• Thrust washer• Clutch housing assemblyEAS25100CHECKING THE FRICTION PLATESThe following procedure applies to all of thefriction plates.1. Check:• Friction plateDamage/wear → Replace the frictionplates as a set.2. Measure:• Friction plate thicknessOut of specification → Replace the fric-tion plates as a set.TIPMeasure the friction plate at four places.EAS25110CHECKING THE CLUTCH PLATESThe following procedure applies to all of theclutch plates.1. Check:• Clutch plateDamage → Replace the clutch plates asa set.2. Measure:• Clutch plate warpage(with a surface plate and thickness gauge“1”)Out of specification → Replace the clutchplates as a set.3. Measure:• assembly width “a” of the friction platesand clutch platesOut of specification → Adjust.TIP• Perform the thickness measurement withoutapplying the oil.• This step should be performed only if the fric-tion plates and clutch plates were replaced.• To measure the total width of the frictionplates and clutch plates, combine 9 frictionplates and 8 clutch plates as shown.Friction plate thickness2.92–3.08 mm (0.115–0.121 in)Wear limit2.82 mm (0.111 in)A. Friction plate 1B. Friction plate 2Warpage limit0.10 mm (0.0039 in)Assembly width42.4–43.0 mm (1.67–1.69 in)