Yamaha YZF-R1(B) 2012 Service Manual

Also see for YZF-R1 2012: Service manual

Contents

CRANKSHAFT5-89TIP• Align the projections “a” of the balancer shaftjournal lower bearings with the notches “b” inthe lower crankcase.• Do not move the balancer shaft until theclearance measurement has been com-pleted.f. Tighten the bolts to specification in thetightening sequence cast on the crankcase.Refer to “CRANKCASE” on page 5-70.g. Remove the lower crankcase and the bal-ancer shaft journal lower bearings.h. Measure the compressed Plastigauge®width “a” on each balancer shaft journal.If the balancer shaft-journal-to-balancershaft-journal-bearing clearance is out ofspecification, select replacement balancershaft journal bearings.▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲4. Select:• Balancer shaft journal bearings (J 1 –J4)TIP• The numbers “A” stamped into the balancershaft web and the numbers “B” stamped intothe lower crankcase are used to determinethe replacement balancer shaft journal bear-ing sizes.• J1 –J4 refer to the bearings shown in the bal-ancer shaft illustration.• If J1 –J 4 are the same, use the same size forall of the bearings.For example, if the crankcase J1 and bal-ancer shaft web J 1 numbers are 6 and 2respectively, then the bearing size for J 1 is:EAS26200INSTALLING THE CRANKSHAFT1. Install:• Crankshaft journal upper bearings(into the upper crankcase)• Crankshaft journal lower bearings(into the lower crankcase)• CrankshaftJ 1 (crankcase) - J 1 (balancer shaft web) - 1 =6 - 2 - 1 = 3 (brown)Bearing color code0.White 1.Blue 2.Black3.Brown 4.Green 5.Yellow6.Pink