Crankcase Bearing Replacement; Right Crankcase Half; Left Crankcase Half - Yamaha V star 1100 Owner's Manual

ENGINE LOWER END
93
Puller
Bearing splitter
Main
bearing
6. Inspect the crankcase studs. Make sure they are
straight and their threads are in good condition. Make
sure they are tightly screwed into the crankcase.
7. Inspect the mating surfaces of both crankcase
halves. They must be free of gouges, burrs or any
damage that could cause an oil leak.
8. Inspect the cases for cracks and fractures, espe-
cially in the lower areas where they are vulnerable to
rock damage.
9. Check the areas around the stiffening ribs and
around bearing bosses for damage. Repair or re-
placed damaged cases.
10. Check the threaded holes in both crankcase
halves for thread damage, dirt or oil buildup. If nec-
essary, clean or repair the threads with a suitable
size metric tap. Coat the tap threads with kerosene
or an aluminum tap fluid before use.

Crankcase Bearing Replacement

Before replacing the crankcase bearings and
bushings, note the following:
1. Because of the number of bearings used in the
left and right crankcase halves, make sure to iden-
tify a bearing and note its location before removing
it. Use the size code markings to identify a bearing.
2. Refer to Bearing Replacement in Chapter One
for general information on bearing removal and in-
stallation.
3. Before heating the crankcase, remove the middle
drive shaft assembly and middle driven shaft as-
sembly (Chapter Seven).
4. Heat the crankcase to approximately 95-125° C
(205-257° F) in an shop oven or on a hot plate. Do
not heat the crankcase with a torch. This type of lo-
calized heating may warp the cases.
5. Drive the bearing out with a suitable size bearing
driver, socket or a drift.
6. After removing bearings and bushings, clean the
crankcase half in solvent and dry it thoroughly.
7. A blind bearing remover (Figure 90) is required
to remove some of the blind bearings in the follow-
ing procedures.
8. When installing a new bearing into the crank-
case, press the outer bearing race only (Figure 91).
Use a bearing driver or socket that matches the out-
side diameter of the bearing.

Right crankcase half

1. Press the main bearing (A, Figure 92),
mainshaft bearing (B) and countershaft bearing (C)
from the case.
2. Use a blind bearing puller to remove the small
middle drive shaft bearing (D, Figure 92).
3. To remove the large middle drive shaft bearing
(E, Figure 92), evenly heat the crankcase and lift
the bearing out.

Left crankcase half

1. Use a blind bearing puller to remove the
mainshaft and countershaft bearings.
2. Replace the main bearing as follows:
a. Remove the crankshaft from the left crank-
case as described earlier in this chapter. The
left main bearing comes out with crankshaft.
b. Use a bearing puller to remove the oil pump
drive gear from the crankshaft.
c. Use a larger bearing puller (Figure 93) to re-
move the main bearing.
3. Install the main bearing as follows:
a. Place support between the crankshaft webs
and set the crankshaft in a press.
b. Press the bearing onto the crankshaft.
c. Press the oil pump gear to the shoulder on the
crankshaft.
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