30/ENGINE - WORK ON INDIVIDUAL PARTS
127
19.16
Measuring the crankshaft end play
301214-10
–
Insert the crankshaft in the right section of the engine case.
Info
Do not forget the fitted bushings.
–
Mount the left section of the engine case.
–
Mount and tighten the screws.
Guideline
Screw, engine case
M6
10 Nm (7.4 lbf ft)
Screw, engine case
M7x1
14 Nm
(10.3 lbf ft)
–
Mount the dial gauge support on the engine case, and measure and note the
crankshaft end play.
Guideline
Crankshaft - end play
0.25… 0.35 mm (0.0098…
0.0138 in)
» If the measured value does not meet specifications:
–
Remove the crankshaft.
–
Remove the crankshaft bearing inner race. (
–
Determine the thickness of the compensating disks by calculating.
–
Add or subtract compensating disks equally on both sides.
Info
If the end play is too small, compensating disks must be removed.
If the end play is too large, compensating disks must be added.
–
Install the crankshaft bearing inner race. (
19.17
Cylinder - Nikasil
®
coating
301248-10
Nikasil
®
is a surface protection layer for a coating procedure developed by Mahle. The
name is derived from the two materials used in this procedure - a layer of nickel into
which is embedded the particularly hard silicone carbide.
The most important advantages of the
Nikasil
®
coating are very good heat conductivity,
resulting in much improved performance, low wear, and a lightweight cylinder.
19.18
Checking/measuring cylinder
301215-10
–
Check the cylinder bearing surface for damage.
» If the cylinder bearing surface is damaged:
–
Change the cylinder and piston.
–
Measure the cylinder diameter at several locations on the
‑
and
‑
axes using a
micrometer to identify oval wear.
Guideline
Cylinder - drill hole diameter (450 SX ATV)
Size I
97.000… 97.012 mm (3.81889…
3.81936 in)
Size II
97.013… 97.025 mm (3.8194…
3.81987 in)
Cylinder - drill hole diameter (505 SX ATV)
Size I
100.000… 100.012 mm (3.937…
3.93747 in)
Size II
100.013… 100.025 mm (3.93751…
3.93798 in)
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