Yamaha YZF-R1(B) 2012 Service Manual

Also see for YZF-R1 2012: Service manual

Contents

CAMSHAFTS5-19EAS23950CHECKING THE TIMING CHAIN GUIDES1. Check:• Timing chain guide (exhaust side) “1”• Timing chain guide (intake side) “2”• Timing chain guide (top side) “3”Damage/wear → Replace the defectivepart(s).EAS23960CHECKING THE TIMING CHAIN TEN-SIONER1. Check:• Timing chain tensionerCracks/damage → Replace.▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼a. Using a hand press, push and insert timingchain tensioner rod “1” into the timing chaintensioner housing.TIPPush the timing chain tensioner rod in direction“a”, and turn the timing chain tensioner body“2” in direction “b” until it stops.b. Keep pressing the timing chain tensionerrod, mount clip “5” into groove “6”, and lockthe timing chain tensioner rod.c. Push the timing chain tensioner rod indirection “c”.d. Make sure that the timing chain tensionerrod can smoothly move out from the timingchain tensioner housing in direction “d”. Ifnot smooth, replace the timing chaintensioner assembly.▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲EAS24000INSTALLING THE CAMSHAFTS1. Install:• Straight key “1”• Collar “2”• Crankshaft sprocket “3”• Timing chainTIP• Align the straight key to the crankshaftgroove “a”, collar and crankshaft sprocketgroove “b” to the straight key and then install.• To prevent the timing chain from falling intothe crankcase, fasten it with a wire “4”.a. 1/4 toothb. Correct1. Timing chain2. Camshaft sprocket or crankshaft sprocket3. Hand press4. Bearing