4. ServiceManual-RocketIll

Note:

• Beforetighteningthebevelboxnuts,fullyinsertthewheelspindlethroughtheswingingarmtoensureitwillrealignwiththeswingingarmwhenthewheelisinstalled.

3. Alignthebevelboxbyfullyinsertingthewheelspindlethroughthebevelboxandswingingarmthen,intheordershownbelow,tightenallthebevelboxnutsto20Nm,thento64Nm.

Note:

• Bevelboxtoswingingarmfixingsaretightenedintwostagesandinaspecificsequence.Tightenallfixingstothelowertorquebeforeprogressingtothehigherfigure.

Bevelboxbolttighteningsequence

4. Refitthelefthandrearsuspensionunitasdescribedonpage13.5.

5. Refittherearwheelasdescribedonpage16.9.

6. Lowerthemotorcycletothegroundandparkitonthesidestand.

7. Checkandtopupthebevelboxoillevelasdescribedonpage6.3.

Driveshaft

Driveshaftdetails canbe foundintherearsuspensionsectiononpage13.5.

ServiceManual-RocketIll

6.5

Thispageintentionallyleftblank

6.6 ServiceManual-RocketIll

7Balancer

TableofContents

ExplodedView-Balancer. 7-2

Introduction 7-3

Removal 7-3

Inspection 7-4

Assembly/Installation 7-4

ServiceManual- RocketIll ^7.1

ExplodedView-Balancer

^7.2 ServiceManual- RocketIll

Introduction

Inanenginewithanevennumberofcylinders(i.e.2,4,6etc.},apistononanupwardstrokeisalwayscounter-balancedbyoneonadescendingstroke.However,inanenginewithanoddnumberofcylinders, suchasthatfittedtotheRocketIll,thisnaturalstateofbalancedoesnotoccur.Thereforeabalancerisfittedtotheengineinordertocontrolirregular pulsescausedbytheoddnumberofcylinders.Without abalancer,theenginewould'pulse'eachtimethecrankshaftrotated.This'pulsing'wouldbefeltasavibrationwhichwouldamplifyasenginespeedincreases.

The balancerhastheeffectofapairofcounterbalanceweights,whichcreateanequalamountofenergyintheoppositedirection,andatthesametimeasthatproducedbythecrankshaft,pistonsandconnectingrods.Becausetheopposingpulsesoccuratthesamepointofcrankshaftrotation,andareofanequalmagnitude,astateofequilibriumorbalanceisreached.

Removal

1. Removetheengineasdescribedonpage10.2.

2. Separatethecrankcasehalvesasdescribedonpage5.5.

3. Withthecrankcasehalvesseparated,liltoutthebalancershaftcompletewiththebearings.

1.Balancer

2.Crankshaft

4. Ifnecessary,slideofftheballbearingattheendoppositetothedrivegear.

1.Balancer

2. Bearing

Note:

• Thebearingatthegearendcanonlyberemovedinapress.

SeiviceManual-RocketIll

7.3

Inspection

1. Inspectallgearsforchippedormissingteethandforoverheating(bluediscolouration).

2. Inspectallbearingsforsignsofoverheating(bluediscolouration),seizureandanyotherdamage.Checkthatallbearingsrotatesmoothlyandwithouttightspots.

Assembly/Installation

Note:

• Afurtheralignmentcheckcanbemadeifrequired.Whennumberonecylinderintheengineisontop-dead-centre(TDC),slotsontheendofthebalancerwillalignwiththesplitlineofthecrankcase.Thisallowsabalancerinstallationcheckonaninstalledenginebyremovingonlytheclutchcover.

Note: 2\,._,....-;:;::.==::::

• Balancershaftsandcrankshaftsaregraded.Ifthebalancershaftisreplaced,itmustbegrade-matchedwiththecrankshaft.Foridentification,botharemarkedadjacenttothealignmentdots(seenotebelow)either'A'or'B'.Alwaysmatchan'A'gradecrankshaftwithan'A'gradebalancershaftandvice-versa.

Note:

• A'B'gradecomponentdoesnotindicateinferiorqualitytoan'A'gradecoponent.

Note:

• Toensureacorrectrelationship,thebalancermustbeinstalledinaspecificorientationrelativetothecrankshaft.Therearedotmarks,oneonthebalancerdrivegear(onthecrankshaft)andoneonthebalancerdrivengear,whichmustbeinalignmentwhenthebalancershaftisfitted.

1. Balancerdrivegear

2. Balancerdrivengear

3. Dotmarks

1. Balancershaft

2. Slotmarks

1. Position thebalancertotheuppercrankcasealigningthedot marksasshownbelow.

1. Balancerdrivegear

2. Balancerdrivengear

3. Dotmarks