ATK 1988 250 Manuale d'uso - Pagina 17

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ATK
250
406
ATK
250
406
ENGINE CLEARANCE
PISTON RING END GAP
STANDARD
0.20 an (0.008 in) - 0.35 mm (0.014in)
0.25
1111
(0.010 in) - 0.40 am (0.016in)
PISTON TO CYLINDER CLEARANCE
STANDARD
0.06
11111
(0.002 in) - 0.08 nm (0.003 in)
0.08 mm
(0.0~3
in) - 0.09 nn (0.0035 in)
SERVICE LIMIT
1.0
m
(0.0401n)
1.2
m
(0.047in)
SERVICE LIMIT
0.14 -
(0.005
0.18
DID
(0.007
Increased perfonnance can
be
obtained by changing compression ratios on
the
250. and 406. The chart below can
be
used as a guide to your fuel
needs.
250
Com2ression Ratio
Fuel Requirement
12.5:1
Stock
Unleaded Regular
Remove 1 head shim
13.0:1
Mod.
Unleaded Premium
Remove 2 head shims 13.5:1
Mod.
100
L1
Aviation
406
Com2ression Ratio
Fuel Reguirement
4x0.2
mm
shims
10.0:1
Stock
Unleaded Regular
Remove 3 shims
10.8:1
Mod.
Unleaded Premium
Remove 4 shims
11.0: 1
Mod.
100 LL Aviation
15