Differences between YZ250F and WR250F: 2003

 

 

From: Yamaha WR250F Info, The Unofficial Yamaha 250F FAQ, Yamaha Owner’s Service Manuals

 

 

 

WR250F

YZ250F

Transmission

5 Speed Wide-ratio

5 Speed Close-ratio

Gearing

1st = ?

2nd = ?

3rd = ?

4th = ?

5th = ?

1st = 30/14 (2.143)

2nd = 28/16 (1.750)

3rd = 29/20 (1.450)

4th = 27/22 (1.227)

5th = 25/24 (1.042)

Final Gearing

? (?) (? / ?)

13/48 (3.692) (steel / alum)

Chain

? (#520)

? (#520)

Rear Wheel

18”

19”

Suspension Valving

Off-Road

MX

Weighted Flywheel

Yes

No

Stock Jetting

Main Jet: ?
Main Air Jet: ?
Jet Needle: ?
Pilot Jet: ?
Pilot Air Jet: ?
Pilot Screw: ?
Starter Jet: ?
Leak Jet: ?
Float Height: ?

Main Jet: #178
Main Air Jet: #200
Jet Needle: OBELP-4
Pilot Jet: #40
Pilot Air Jet: #100
Pilot Screw: ?
Starter Jet: ?
Leak Jet: #100
Float Height: ?

Exhaust Cam Timing

127.5 degrees

105 degrees

Air Cut Valve

?

No

CDI Map

Gray Wire

No Gray Wire

Fuel Capacity

2.6 gallons w/ reserve

1.8 gallons no reserve

Radiator

11 Tubes + overflow canister

10 Tubes

Spark Arrestor

Yes

No

Subframe

?

Aluminum

Left Engine Guard

?

No

Lights

Headlight / Taillight

None

Stator

120 W

??

Sidestand

Yes

No

Odometer

Yes

No

Top Speed

+15 mph

 

Seat

Compromised

Normal

 

 

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Last Updated 11/01/2003