Yamaha YZF-R1(B) 2012 Service Manual

Also see for YZF-R1 2012: Service manual

Contents

CONNECTING RODS AND PISTONS5-79• After installing the big end bearing, assemblethe connecting rod and connecting rod capwithout installing them onto the crankshaft.TIPInstall by carrying out the following proceduresin order to assemble in the most suitable con-dition.e. Tighten the connecting rod bolt whilechecking that the sections shown “a” and“b” are flush with each other by touchingthe surface.TIPTo install the big end bearing, care should betaken not to install it at an angle and the posi-tion should not be out of alignment.f. Loosen the connecting rod bolt, remove theconnecting rod and connecting rod cap andinstall these parts to the crankshaft with thebig end bearing kept in the current condi-tion.TIP• Do not move the connecting rod or crank-shaft until the clearance measurement hasbeen completed.• Make sure that the projection “a” on the con-necting rod cap faces the same direction asthe “Y” mark “b” on the connecting rod.• Make sure the “Y” marks “b” on the connect-ing rods face towards the left side of thecrankshaft.g. Tighten the connecting rod bolts with atorque wrench.h. Put a mark “1” on the corner of the con-necting rod bolt “2” and the connecting rodcap “3”.i. Tighten the connecting rod bolts further toreach the specified angle 145°–155°.Connecting rod bolt30 Nm (3.0 m·kgf, 22 ft·lbf)a. Side machined faceb. Thrusting facesConnecting rod bolt (1st)20 Nm (2.0 m·kgf, 14 ft·lbf)Connecting rod bolt (final)Specified angle 145°–155°