Yamaha MZ250 2012 Supplementary Service Manual page 27

Model name:
Model code number:
Valve spring:
Free length
<Limit>
Installed length
Installed compression spring force
Tilt limit
Carburetor:
Type/manufacture
I.D. mark
Bore size
Main jet
Main air jet
Pilot air jet
Pilot outlet
Valve seat size
Main nozzle
Pilot jet
Pilot screw
Throttle valve
Governor arm:
Tension spring attach hole
Engine speed:
High engine speed
Low engine speed
* MZ300KHIDM
MAINTENANCE SPECIFICATIONS
mm (in)
IN
EX
IN
EX
IN
EX
IN N (kgf, lbf)
EX N (kgf, lbf)
mm (in)
mm (in)
4
3
2
1
5
6
7
8
9
r/min
3750–3850 3700–3800 3750–3850 3700–3800
1900–2100
4-6
MZ250
7KBJ 7KBN
36.2 (1.4252)
36.2 (1.4252)
34.39 (1.3539)
34.39 (1.3539)
29 (1.1417)
29 (1.1417)
91.20–104.93 (9.30–10.70, 20.50–23.59)
91.20–104.93 (9.30–10.70, 20.50–23.59)
1.7 (0.0669)
BV24-18/MIKUNI
7KB00
ø18
#96.3
ø1.7 (0.067)
ø0.8 (0.032)
ø1.1 (0.043)
ø1.5
62B
#37.5
2 turns out
#120
2 8
— 1900–2100
SPEC
MZ300
7VBJ 7VBN
7VB00
7VB00
7VB10*
#103.8
ø1.85 ø1.85 (0.073)
(0.073) ø1.8 (0.071)*
ø1.0 (0.039)
ø1.0 (0.039)
60A
#45
#125
2
—