ClassicMotorcycleMechanicsJune2020

Shaft

Garter Spring

Seal Lip

DustLip

Rubber Body

Steel Insert

Centre Line

Oil Seal - in section

securingboltsitwouldn’tflytothefloor
undergravity.Itwasthenstraightforward
toliftthepowerplantfromthebench
andslideitontopoftheMDFinthe
duplexcradle.
BecauseIwasworkingsoloIattached
apieceofropearoundthecrankonthe
left,upthroughthetiepointsofthe
liftingarmabovemybenchandback
downtobetiedoffontheclutchbasket
theotherside.Ithendroppedthebench
downalittlebitsotheropetooksomeof
theweightoftheengine,allowingmeto
gettheMDFandtowelsouttheway.
Withtheenginepartiallysupported
fromaboveIwasthenabletonudgethe
engineintoitsfinalrestingplacewithout
fearoftrappingmyfingers.Hadthe
engineunitbeenanyheavierIshould
havefoundmoresuitableliftingpoints,
butforthisparticularapplicationthelow
loadsbeingappliedwerenotaworry.
Assomeoneusedtoworkingon
Kawasaki’sfour-strokemultis,Ihave
beenlessthanenamouredwiththebuild
qualityofthetriplecomparedwiththe
Z 1 s;theywereclearlybuilttoaprice.
Withthemotorinplacetheengine

seemedsomewhatnarrowerthantheframe

atthemountingpoints.Imeasuredthe

‘slop’andthensearchedaroundmy

washercollectiontofindwasherstoactas

shimstopackoutthegapsattheengine

mounts.FrommemoryIthinkthatthegap

was 1 mm.Disappointing,whenIhave

workedonsomanybigZedswherethe

rearofthecrankcasefitsintotheframe

cradleastightlyasanotter’spocket.Ihad

allthemountingboltsre-platedwithbright

zincforthatnewlook.

2 3

1

4

Simple solutions:Useoldtakeawaytubsforkeepingpartstogether.

1/There-platedscrewsandplatesofthe
oilscavengesystemcheckvalves.2/The
bodyoftheoilscavengevalveandthemica
petalvalveandit’sgasket.3/Screwingthe
lidontothevalvebodywithaJIS
screwdriver.

4/Usingatorquescrewdrivertotightenthescrewstothecorrectsetting.

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