Difference between revisions of "Yamaha YZ250"
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− | {{DISPLAYTITLE:Yamaha YZ250 | + | {{DISPLAYTITLE: Yamaha YZ250}} |
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__notoc__ | __notoc__ | ||
− | [[File:Yz250.png|center| | + | [[File: Yz250.png | center | 700px]] |
− | + | The Yamaha YZ250 dates back to 1974 and, unlike the 2-stroke motocross models from other Japanese manufacturers, is still marketed in North America and Europe. | |
{{Ads_top}} | {{Ads_top}} | ||
− | ''' | + | '''Main competitors:''' |
− | * [[Honda_CR250R|Honda CR250R]] | + | * [[Honda_CR250R | Honda CR250R]] |
− | * [[Kawasaki_KX250|Kawasaki KX 250]] | + | * [[Kawasaki_KX250 | Kawasaki KX 250]] |
− | * [[Suzuki_RM250|Suzuki RM 250]] | + | * [[Suzuki_RM250 | Suzuki RM 250]] |
− | + | Considering the Yamaha YZ 250 model, it should be noted that the models are of the greatest interest since 2005 - it was at this time that the motorcycle began to be equipped with an aluminum frame. | |
− | + | The model was based on a single-cylinder 2-stroke liquid-cooled engine with a volume of 249 cm³, producing 53 hp. power and 49 Nm of torque (data refer to 2005 model). | |
− | + | In 2006, the Yamaha YZ250 received a new KYB SSS (Speed-Sensitive System) front fork, in 2008 - petal brake discs. | |
− | + | In 2017, the front brake disc diameter is increased from 250 to 270 mm. | |
− | + | Other features of the model include an aluminum frame, the presence of a YPVS power valve system (optimize engine performance depending on engine speed), a carburetor power system (with a throttle position sensor), fully adjustable sports suspensions, an 8-liter fuel tank, a 5-speed gearbox and 103 kg of curb weight. | |
− | + | In parallel, the [[Yamaha_YZ125 | Yamaha YZ125]] version was also produced, which generally had a lot in common with the YZ250, but was equipped with a smaller engine and a 6-speed gearbox. | |
− | + | The Yamaha YZ 250 has taken part in many international motocross competitions, where it consistently ranked high: | |
* 5 AMA National Motocross | * 5 AMA National Motocross | ||
* 9 AMA National Supercross | * 9 AMA National Supercross | ||
Line 33: | Line 28: | ||
* EMX300 Championship (2014) | * EMX300 Championship (2014) | ||
− | + | Also in the line of Yamaha motocross motorcycles there is a 4-stroke version - [[Yamaha_YZ250F | Yamaha YZ250F]]. | |
− | == | + | == Photos == |
− | + | <gallery mode = "packed" heights = 200px> | |
− | + | File: Img yz250 1.jpg | | |
− | + | File: Img yz250 2.jpg | | |
− | + | File: Img yz250 3.jpg | | |
− | |||
− | <gallery mode="packed" heights=200px> | ||
− | File:Img yz250 1.jpg| | ||
− | File:Img yz250 2.jpg| | ||
− | File:Img yz250 3.jpg| | ||
</gallery> | </gallery> | ||
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{{ads_post}} | {{ads_post}} | ||
− | == | + | == Specifications == |
− | + | Specifications Yamaha YZ250 (2005+): | |
− | {| class="wikitable" | + | {| class = "wikitable" |
− | ! scope="row"| | + | ! scope = "row" | Model |
− | |Yamaha YZ250 | + | | Yamaha YZ250 |
|- | |- | ||
− | ! scope="row"| | + | ! scope = "row" | Motorcycle type |
− | | | + | | cross |
|- | |- | ||
− | ! scope="row"| | + | ! scope = "row" | Release year |
− | |1974+ | + | | 1974+ |
|- | |- | ||
− | ! scope="row"| | + | ! scope = "row" | Frame |
− | | | + | | Aluminum half duplex |
|- | |- | ||
− | ! scope="row"| | + | ! scope = "row" | Engine type |
− | |1- | + | | 1-cylinder, 2-stroke |
|- | |- | ||
− | ! scope="row"| | + | ! scope = "row" | Working volume |
− | |249 | + | | 249 cm³ |
|- | |- | ||
− | ! scope="row"| | + | ! scope = "row" | Bore / stroke |
− | |66 | + | | 66.4 x 72.0 mm |
|- | |- | ||
− | ! scope="row"| | + | ! scope = "row" | Compression ratio |
− | |8.9~10.6:1 | + | | 8.9 ~ 10.6: 1 |
− | 9.2~10.9:1 | + | 9.2 ~ 10.9: 1 - YZ250 (up to 2015, North America) |
|- | |- | ||
− | ! scope="row"| | + | ! scope = "row" | Cooling |
− | | | + | | liquid |
|- | |- | ||
− | ! scope="row"| | + | ! scope = "row" | Number of valves per cylinder |
− | | | + | | petal valve |
|- | |- | ||
− | ! scope="row"| | + | ! scope = "row" | Fuel supply system |
− | | | + | | Carburetor, 1x Keihin PWK38S |
|- | |- | ||
− | ! scope="row"| | + | ! scope = "row" | Ignition type |
− | |CDI | + | | CDI |
|- | |- | ||
− | ! scope="row"| | + | ! scope = "row" | Maximum power |
− | |53 | + | | 53.0 h.p. (38.9 kW) at 8000 rpm |
|- | |- | ||
− | ! scope="row"| | + | ! scope = "row" | Maximum torque |
− | |49 | + | | 49.0 Nm (5.0 kg-m) at 7500 rpm |
|- | |- | ||
− | ! scope="row"| | + | ! scope = "row" | Gearbox |
− | |5- | + | | 5-speed |
|- | |- | ||
− | ! scope="row"| | + | ! scope = "row" | Drive type |
− | | | + | | chain |
|- | |- | ||
− | ! scope="row"| | + | ! scope = "row" | Front tire size |
− | |80/100-21 51M | + | | 80 / 100-21 51M |
|- | |- | ||
− | ! scope="row"| | + | ! scope = "row" | Rear tire size |
− | |110/90-19 62M | + | | 110 / 90-19 62M |
|- | |- | ||
− | ! scope="row"| | + | ! scope = "row" | Front brakes |
− | |1 | + | | 1 disc, 250mm, 2-piston caliper - YZ250 (up to 2017) |
− | + | Single disc, 270 mm, 2-piston caliper - YZ250 (2017+) | |
|- | |- | ||
− | ! scope="row"| | + | ! scope = "row" | Rear brakes |
− | |1 | + | | 1 disc, 245 mm, 1-piston caliper |
|- | |- | ||
− | ! scope="row"| | + | ! scope = "row" | Front suspension |
− | | | + | | 48mm inverted fork (fully adjustable), 300mm travel |
|- | |- | ||
− | ! scope="row"| | + | ! scope = "row" | Rear suspension |
− | | | + | | linkage with monoshock (fully adjustable), stroke - 315 mm |
|- | |- | ||
− | ! scope="row"| | + | ! scope = "row" | Motorcycle length |
− | |2184 | + | | 2184 mm |
|- | |- | ||
− | ! scope="row"| | + | ! scope = "row" | Motorcycle width |
− | |827 | + | | 827 mm |
|- | |- | ||
− | ! scope="row"| | + | ! scope = "row" | Motorcycle height |
− | |1309 | + | | 1309 mm |
|- | |- | ||
− | ! scope="row"| | + | ! scope = "row" | Wheelbase |
− | |1481 | + | | 1481 mm |
− | 1446 | + | 1446 mm - YZ250 (2015+) |
|- | |- | ||
− | ! scope="row"| | + | ! scope = "row" | Saddle height |
− | |997 | + | | 997 mm |
− | 976 | + | 976 mm - YZ250 (2015+) |
|- | |- | ||
− | ! scope="row"| | + | ! scope = "row" | Minimum ground clearance |
− | |385 | + | | 385 mm |
− | 367 | + | 367 mm - YZ250 (2015+) |
|- | |- | ||
− | ! scope="row"| | + | ! scope = "row" | Acceleration to 100 km / h |
| | | | ||
|- | |- | ||
− | ! scope="row"| | + | ! scope = "row" | Maximum speed |
| | | | ||
|- | |- | ||
− | ! scope="row"| | + | ! scope = "row" | Fuel tank capacity |
− | |8 | + | | 8.0 l |
|- | |- | ||
− | ! scope="row"| | + | ! scope = "row" | Motorcycle weight (curb) |
− | |103 | + | | 103 kg |
|- | |- | ||
|} | |} | ||
− | == | + | == Yamaha Off-Road Motorcycles == |
{{Yamaha_enduro}} | {{Yamaha_enduro}} | ||
− | == | + | == Documentation == |
− | + | [[Category:Motorcycles]] | |
− | + | * [[Yamaha_YZ250:_manuals|Yamaha YZ250]] | |
− | |||
− | |||
− | |||
− | |||
− | * [[Yamaha_YZ250:_manuals|Yamaha YZ250 | ||
== == | == == | ||
{{Ads_recomended}} | {{Ads_recomended}} |
Latest revision as of 21:51, 15 August 2021
The Yamaha YZ250 dates back to 1974 and, unlike the 2-stroke motocross models from other Japanese manufacturers, is still marketed in North America and Europe.
Main competitors:
Considering the Yamaha YZ 250 model, it should be noted that the models are of the greatest interest since 2005 - it was at this time that the motorcycle began to be equipped with an aluminum frame.
The model was based on a single-cylinder 2-stroke liquid-cooled engine with a volume of 249 cm³, producing 53 hp. power and 49 Nm of torque (data refer to 2005 model).
In 2006, the Yamaha YZ250 received a new KYB SSS (Speed-Sensitive System) front fork, in 2008 - petal brake discs.
In 2017, the front brake disc diameter is increased from 250 to 270 mm.
Other features of the model include an aluminum frame, the presence of a YPVS power valve system (optimize engine performance depending on engine speed), a carburetor power system (with a throttle position sensor), fully adjustable sports suspensions, an 8-liter fuel tank, a 5-speed gearbox and 103 kg of curb weight.
In parallel, the Yamaha YZ125 version was also produced, which generally had a lot in common with the YZ250, but was equipped with a smaller engine and a 6-speed gearbox.
The Yamaha YZ 250 has taken part in many international motocross competitions, where it consistently ranked high:
- 5 AMA National Motocross
- 9 AMA National Supercross
- AMA National Supercross (2004)
- 6-time AMA National Offroad Championships
- EMX300 Championship (2014)
Also in the line of Yamaha motocross motorcycles there is a 4-stroke version - Yamaha YZ250F.
Photos
Specifications
Specifications Yamaha YZ250 (2005+):
Model | Yamaha YZ250 |
---|---|
Motorcycle type | cross |
Release year | 1974+ |
Frame | Aluminum half duplex |
Engine type | 1-cylinder, 2-stroke |
Working volume | 249 cm³ |
Bore / stroke | 66.4 x 72.0 mm |
Compression ratio | 8.9 ~ 10.6: 1
9.2 ~ 10.9: 1 - YZ250 (up to 2015, North America) |
Cooling | liquid |
Number of valves per cylinder | petal valve |
Fuel supply system | Carburetor, 1x Keihin PWK38S |
Ignition type | CDI |
Maximum power | 53.0 h.p. (38.9 kW) at 8000 rpm |
Maximum torque | 49.0 Nm (5.0 kg-m) at 7500 rpm |
Gearbox | 5-speed |
Drive type | chain |
Front tire size | 80 / 100-21 51M |
Rear tire size | 110 / 90-19 62M |
Front brakes | 1 disc, 250mm, 2-piston caliper - YZ250 (up to 2017)
Single disc, 270 mm, 2-piston caliper - YZ250 (2017+) |
Rear brakes | 1 disc, 245 mm, 1-piston caliper |
Front suspension | 48mm inverted fork (fully adjustable), 300mm travel |
Rear suspension | linkage with monoshock (fully adjustable), stroke - 315 mm |
Motorcycle length | 2184 mm |
Motorcycle width | 827 mm |
Motorcycle height | 1309 mm |
Wheelbase | 1481 mm
1446 mm - YZ250 (2015+) |
Saddle height | 997 mm
976 mm - YZ250 (2015+) |
Minimum ground clearance | 385 mm
367 mm - YZ250 (2015+) |
Acceleration to 100 km / h | |
Maximum speed | |
Fuel tank capacity | 8.0 l |
Motorcycle weight (curb) | 103 kg |
Yamaha Off-Road Motorcycles
Yamaha | ||
---|---|---|
85-150 см³ | YZ85 · WR125 · YZ125 | |
200-250 см³ | TW200 · TW225 · Serow 225 · Serow 250 · TT-R250 · WR250F · XG250 · YZ250 · YZ250F | |
400-500 см³ | WR450F · YZ450F | |
600-750 см³ | XT660R |
Documentation