Yamaha BR250F Service Manual page 16

7. Check the minimum pump stroke.
a. Turn the oil pump gear until the plunger
is at its maximum distance from the
pump body.
b. Using a feeler gauge, measure the gap
between the adjusting plate and the
raised boss on the adjusting puIley.
Minimum pump stroke:
0.2'" 0.25 mm (0.08'" 0.010 in)
1. Oil pump gear 2. Plunger 3. Minimum pump stroke
8.
Measure the maximum pump stroke.
a. Pull the oil pump cable out of its sheath
as far as it will go. The cable must be
held in this taut position when
measur-
ing maximum pump stroke. It may be
helpful to securely wrap duct tape
around the cable where it enters the
sheath.
b. Turn the oil pump gear until the plunger
is at its maximum distance from the
pump body.
c. Using a feeler gauge, measure the gap
between the adjusting plate and the
raised boss on the adjusting pulley.
Maximum pump stroke:
1.65 -- 1.87 mm (0.065'" 0.074 in)
1. Oil pump gear 2. Plunger 3. Maximum pump stroke
2-5
9. If either the maximum pump stroke or
the minimum pump stroke does not
equal specification, remove the adjusting
plate and add or remove adjusting shims
as required. Adding shims increases the
stroke, removing shims decreases the
stroke.
1. Adjusting shim
1O.
Reinstall the adjusting plate and lock
nut. Torque the nut to specification.
Recheck maximum and minimum pump
stroke.
Tightening torque:
0.67 m-kg (4.8 ft-lb)
11. Grease the adjusting plate, and reinstall
the oil pump cover. Seal the cover with
Yamabond
5.
Torque the screws to
specification.
Tightening torque:
0.2 m-kg (1.45 ft-Ib)