Crankshaft; Inspection - Yamaha YTZ250S 1986 Service Manual

2. Check to see that all parts move freely and
that all loose shims are in place. Make sure
all shafts are fully seated.
3. Thoroughly clean the case mating sur-
faces of oil or grease with lacquer thin-
ner. Apply YAMAHA BOND #4 to the
mating surfaces of both case halves.
NOTE: ______________________ _
a. Do not tap on machined surface or end
of crankshaft.
b. Before installing the crankshaft, check the
crankshaft a-ring for damage.
4. After reassembly, apply a liberal coating
of two-stroke oil to the crank pin and
bearing and into each crankshaft bearing
oil delivery hole.
5. Check crankshaft and transmission shafts
for proper operation and freedom of
movement.
3-31
CRANKSHAFT
1.
Remove crankshaft assembly with
crankcase separating tool.
1. Crankcase separating tool
Inspection
F
--
6
A
1. Mount the dial gauge at right angles to
the connecting rod small end, holding the
bottom of rod toward the dial indicator.
Rock top of rod and measure axial play.
Small end free play
(F):
0.4-1.0 mm (0.016-0.039 in)
Limit: 2 mm (0.079 in)