OZ ATV :: The Australian ATV Forum

[gammie89]

can someone tell me what torque the headbolts on a yfz450 have to be (the long bolts) and the sequence in what you tighten them up at, im guessing it is just a criss cross pattern.

and the torque on the cam covers (the cap/cover thing that holds the cams down) and sequences to tighten those up too.

oh and how do i know how tight to get the timing chain?

any help is appreciated
james
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04 yfz450

[bigjon]

Mate, it's difficult to explain. Best thing to do is get a copy of the service manual.

If you've got a fax I'll send the pages you need.
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Last edited by bigjon on Fri Apr 04, 2008 3:48 pm; edited 1 time in total

[Quad Squad]

For the head...

grease the bolt heads and washers
tighten to 22 ft/lb
remove and regrease
tighten to 14 ft/lb
tighten a further 180 degrees over 2 stages ( 90 degrees at a time)

all in a criss cross pattern

cam caps are done to 7.2ft/lb in a criss cross pattern, work from inside out on the inlet side because of the 6 bolts.

IMPORTANT: make sure that the cams spin freely once torqued.

the cam chain tensioner is self adjusting, just let the tensioner relax itself.
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[gammie89]

thanks quad squad much appreciated

nah bigjon we dont have a fax, thanks anyway
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04 yfz450