Yamaha BR250F - Top End

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D. Top End
This model has a one-piece
cylinder and
cyl inder-head assembly. There is no
cylinder
head to remove and service separately from
the cyl inder.
Cylinder
Disassembly
1. Loosen
the spark plug, and remove the
cyl inder from the crankcase.
2. Cover the crankcase
with a clean rag so
nothing will accidently drop into the
crankcase.
3. Remove a piston
pin cIip from the
... piston, and remove the pin with the
universal piston-pin puller.
Universal piston-pin puller:
YU-01304
MS623 BR250F Service Manual Revised 1/82
2-6
~ Cvlinder Bolt
Piston Pin CIip
4. Remove the piston and the small-end
bearing
from the connecting rod.