http://www.adbmag.com.au JUNE 2017| 153
FACTORY RIDE / READERS RIDE / HERITAGE / ACTION / OAS / BUYERS GUIDE
1STANDUP
Sitthebikeonapitstandsotherear
wheelisoffthegroundandnot
supportinganyweight.
2CLEARTHEDECKS
Removetheseatandsideplates.Some
bikesyoucanremovethesideairbox
covertomakeiteasierandothermodels
youwillneedtoremovearadiatorshroud
toreachthetopshockbolt.
3REMOVEEXHAUST
Removetheexhaustsystemandsetit
aside.Onsomebikesyouhavetoremove
theheaderbeforeyoucanunboltthe
silencer.
4 SHOCK TO THE SYSTEM
Removethetopandbottomshockbolts
sothattheshockisloose.Bikeswitha
monoshocksometimesrequireyouto
removepartofthelinkagebeforeyou
canreachthebottomshockbolt.
5 SUBFRAME
Removetheboltsfromthesubframeand
movethesubframetothesidetogive
youroomtoremovetheshock.Most
bikesyoucandothiswithoutloosening
theairintakebootbutsomebikes
requireyoutoremovethesubframe
completely.Someyoucanswingthe
subframeupoutofthewaybyleaving
thetopsubframeboltsinposition.
WHYCHANGE
A SPRING?
Themainreasonforchangingaspringiswhen
thestockoneistoosoftortoohard.Springsare
calibratedinN/mmorkg/mmandsuitcertain
riders’weights,capabilitiesandriding.For
example,acommonsagsettingforamotocross
rideris30mmstaticand100mmridersag.Ifyou
needtowindthepreloadupalmostalltheway
toget 100 mmridersagthenyouwillneeda
heavierspring.Ifgettingaridersagof 100 mm
makesthespringlooseontheshockbodyor
yourstaticsagbecomesmuchgreaterthan
30 mm,thenyouneedalighterspring.Most
manufacturerslistoptionalspringsintheir
manualsandspecifywhatweightriderssuit
whichsprings.Ifyouhavethecorrectspring
fittedandstillfindthesuspensiontoosoftor
toobouncythenthisisfixedbyadjustingyour
clickersorhavingasuspensiontunerre-valve
thedampingrods.
SAG
Acommonmotocrosssagsettingis 30 mmstatic
and 100 mmwiththeriderbutsomeridersprefer
toadjustthis 5 -1 0 mmeitherway.Acommon
endurosettingis 40 mmstaticand 110 mmrider
buttherearesomepeoplewhoprefera
motocrosssetupinthebush.Thenewreverse-
headYamahashandlebetterwitharidersagof
110 mmorgreaterforbothinthebushand
motocrosstrack,anymorethanthisandthey
strugglewithsteeringandrearwheeltraction.
TO SET IT:
- Startwiththebikeonapitstandwiththerear
wheelofftheground. - Measurefromapointonyourswingarm,
usuallytherearaxletoapointonyourrear
guard.Thisisyourfreelength. - Takethebikeoffthestandand,withitresting
onitsownweight,measurefromthesamepoint
ontheswingarmtothesamepointontherear
guard.Thedifferencebetweenthis
measurementandyourfirstoneisyourstatic
sag.Formotocrossthisshouldbeapproximately
30 mmorupto 40 mmforenduro. - Gettherideronthebikeandhavethemput
theirfeetuponthebikewithsomebodyholding
thebikeupright.Measurefromthesamepoint
ontheswingarmtothesamepointontherear
guard.Thedifferencebetweenthis
measurementandyourfirstmeasurementis
yourridersag.Formotocrossthismeasurement
shouldbeabout 100 mmand,forenduro,it
shouldbe110mmorgreater. - Ifyourmeasurementsareoutthenyouneedto
windinthelockringstoreducethesag
measurementsorbackthemofftoincreasethe
sagmeasurements.
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FITTING A REAR spring is not a hard job
but there are a few tricks to make it
easier. We’re going to explain why you
would change a spring, how to do it and
how to set up the suspension afterwards.