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Yamaha XT250X - Page 27

Yamaha XT250X
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ENGINE SPECIFICATIONS
2-8
Air filter
Air filter element Oil-coated paper element
Carburetor
Type × quantity MV33 x 1
Manufacturer TEIKEI
ID mark 3C58 00 (U49)
3C59 00 (CAL)
Main jet #135
Main air jet 1.20
Jet needle 5A21-1
Needle jet 2.585
Pilot air jet 1 0.90
Pilot outlet 0.8x1.2
Pilot jet #34
Bypass 1 0.8
Bypass 2 0.8
Bypass 3 0.8
Bypass 4 0.8
Pilot screw turn out 2–1/2
Valve seat size 0.50
Starter jet 1 #90
Starter jet 2 #78
Throttle valve size 33
Float height 11.9 mm (0.47 in)
Idling condition
Engine idling speed 1300–1500 r/min
CO% 0.5–1.5 %
Intake vacuum 29.0–37.0 kPa (8.6–10.9 inHg) (218–278 mm
-
Hg)
Oil temperature 95.0–105.0
°C (203.00–221.00
°F)
Throttle cable free play 3.0–5.0 mm (0.12–0.20 in)

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