Valve Geari Ng; Tappet Clearance - MOTO GUZZI 850-T Owner's Manual

42 VALVE GEARI NG
Tappet clearance
(fig.
24)
Every 3000 km (2000 mil es ) or any time valve
ope rati on is teo noisy. tappet c l earance shoul d
be checl<~d.
Thi s adjustment is made on a co ld eng i ne with
the piston at TOe exact ly at the end of its com-
p ress ion stroke.
After rem oving the head c over, opera t e as
follows:
slacken nut .A .. ;
2 screw in or out the adjuster screw - 0 "
un~ !I
the fo llowin!; clearances are ob!a
in ec:
inlet va lv!: mm 0.22 :
exhaust va lve mm 0.22.
Use a feel =(
ga u~e
Me"
to c hecl< this cl earanc:.
When this is excessive, there ',viii
~e
noisy va lve
operat ion ; if
it
is less. the vaives ;;'lay nc·: clos e
fully causing inccn ven iences such as:
24
- compression loss;
- engine overheating. etc.
On a new engine, this adj ustment must be made
aUet the firs t 500 km (300 miles).
Checking oi valve tim ing
A job ot this kine is
best done
by Officially ap-
pointed Moto Guzzi dealers.