Yamaha YZF-R1(B) 2012 Service Manual

Also see for YZF-R1 2012: Service manual

Contents

FRONT FORK4-66EAS23010CHECKING THE FRONT FORK LEGSThe following procedure applies to both of thefront fork legs.1. Check:• Inner tube “1”• Outer tube “2”Bends/damage/scratches → Replace.WARNINGEWA13650Do not attempt to straighten a bent innertube as this may dangerously weaken it.2. Measure:• Spring free length “a”Out of specification → Replace.3. Check:• Damper rod “1”Damage/wear → Replace.Obstruction → Blow out all of the oil pas-sages with compressed air.ECA14200• The front fork leg has a built-in damperadjusting rod and a very sophisticatedinternal construction, which are particu-larly sensitive to foreign material.• When disassembling and assembling thefront fork leg, do not allow any foreignmaterial to enter the front fork.4. Check:• Cap bolt “1”• Cap bolt collar projections “2”Cracks/damage → Replace.EAS14B1008ASSEMBLING THE FRONT FORK LEGSThe following procedure applies to both of thefront fork legs.WARNINGEWA14B1010• Make sure the oil levels in both front forklegs are equal.• Uneven oil levels can result in poor han-dling and a loss of stability.TIP• When assembling the front fork leg, be sureto replace the following parts:- Oil seal- Dust seal- O-ring• Before assembling the front fork leg, makesure all of the components are clean.1. Install:• Damper rod assembly “1”• Inner tube “2”ECA14B1006Allow the damper rod assembly to slideslowly down the inner tube “2”. Be carefulnot to damage the inner tube.Fork spring free length271.5 mm (10.69 in)Limit266.1 mm (10.48 in)