Yamaha BR250F Service Manual page 138

Model
Crankshaft:
Crank Width" F"
Assembly Width" An
Connecti ng Rod Small End Free Play "B"
Connecting Rod Big End Clearance "C"
Crankshaft Deflection "0":
Measuring Point - 1
-2
-3
4
Inside Diameter for Crank Pin
BR250TJ
55.95 -- 56.00 mm (2.202 -- 2.362 in)
2.0 mm (0.080 in)
0.25"'" 0.75 mm (0.010'" 0.030 in)
0.02 mm (0.0008 in)
0.02 mm (0.0008 in)
23.900 -- 23.915 mm (0.941 -- 0.942 in)
100 mm /3.9 in) 80 mm (3.1 in)
I
~
&
Jl
~
-1-
Il
LlH [
.' - -'
:=J
R/H
~
JL
:/
(M.J.)
(M.AJ.l
(P.J.)
(P.AJ.)
(AS.)
(Pw.J.)
Big End Bearing:
Type
Small End Bearing:
Type
rank Pin:
Outside Dia.
Crank Bearing:
Type Quantity:
Crankshaft Left
Crankshaft Center
Crankshaft Right
Crank Oil Seal:
Type/Size Quantity:
Crankshaft Left
Crankshaft Center
Crankshaft Right
Connecting Rod:
Parallel Limit
Intake:
Type
Carburetor:
Type/Manufacturer Quantity
1.0.
Mark
Main Jet
Main Air Jet
Jet Needle
Needle Jet
Pilot Jet
Pilot Air Jet
Air Screw
Power Jet
25-
.
__
.
__
..
_
....
_ --_._
...
_ - - -
Needle bearing
23.987'" 24.000 mm (0.9444'" 0.9449 in)
#6306
#6305
S03-30, 72, 71, GS
505-25/ 48, 8/ GS
<
0.05 mm (0.0020 in)
>
Piston valve
B032-28/KEIH IN
80JOO
#105
#78
#100
1 and 1/4 turns out