Difference between revisions of "Yamaha YZ125"
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{{DISPLAYTITLE:{{PAGENAME}}: review, history, specs}} | |||
{{Motorcycle | |||
= | |name = Yamaha YZ125 | ||
|photo= Yamaha-yz125-2007-2007-1.jpg | |||
|aka = YZ125X, YZ 125 | |||
|manufacturer = Yamaha | |||
|parent_company = | |||
|production = 1997 - 2019 | |||
<br | |model_year = | ||
|predecessor = | |||
|successor = | |||
|class = Motocross | |||
<br | |engine = single cylinder, two-stroke | ||
|bore_stroke = 54.0mm x 54.5mm | |||
|compression = 10.7:1 | |||
|top_speed =72 mph | |||
|power = | |||
|torque = 17.7 ft/lbs (24.0 Nm) @ 10000RPM | |||
|ignition = cdi | |||
|spark_plug = {{sparkplug|NGK B10EG}} '76-80 , '81<br />{{sparkplug|NGK B9EG}} '74-75<br />{{sparkplug|NGK B9EG}} '82 , '84-85 , '88-98<br />{{sparkplug|NGK BR9EG}} '83 , '86-87 , '99-08 | |||
|battery = | |||
|transmission = Gear box: 6-speed <br> | |||
Final Drive: [[chain]] <br> | |||
Clutch: multiplate [[wet clutch]] <br> | |||
|frame = | |||
|suspension =Front: kyb® speed-sensitive system inverted fork; fully adjustable <br> | |||
Rear: kyb® single shock; fully adjustable | |||
|brakes =Front: single disc. hydraulic. <br>Rear: single disc. hydraulic. | |||
|front_tire = {{tire|3.00-21}} '76 , '77-80 , '81 , '82<br />{{tire|2.75-21}} '74-75<br />{{tire|80/100-21}} '86-87 , '88 , '89-93 , '94-96 , '97-98 , '99-04 , '05-08<br />{{tire|90/90-21}} '83 , '84 , '85 | |||
|rear_tire = {{tire|6675}} '76 , '77-80 , '81 , '82<br />{{tire|130/80-18}} '83 , '84 , '85<br />{{tire|100/90-19}} '89-93 , '94-96 , '97-98 , '99-04 , '05-08<br />{{tire|3.50-18}} '74-75<br />{{tire|100/100-18}} '86-87 , '88 | |||
|rake_trail = | |||
|wheelbase = 56.81 inches (1443 mm) | |||
|length = 84.09 inches (2136 mm) | |||
|width = 32.6 inches (828 mm) | |||
|height = 50.98 inches (1295 mm) | |||
|seat_height = 38.39 inches (975 mm) | |||
|dry_weight = 190.04 pounds (86.2 Kg) | |||
|wet_weight = 93.9 kg | |||
|fuel_capacity = 2.11 Gallon (8.00 Liters) | |||
|oil_capacity = | |||
|recommended_oil= Yamalube 10w-40 | |||
|fuel_consumption = | |||
|turning_radius = | |||
|related = [[Yamaha YZ50]]<br />[[Yamaha YZ60]]<br />[[Yamaha YZ80]]<br />[[Yamaha YZ85]]<br />[[Yamaha YZ100]]<br />[[Yamaha YZ125]]<br />[[Yamaha YZ250]]<br />[[Yamaha YZ400]]<br />[[Yamaha YZ465]]<br />[[Yamaha YZ490]] | |||
|competition = [[Honda CR125R]]<br />[[Kawasaki KX125]]<br />[[Suzuki RM125]] | |||
}} | |||
The '''[[Yamaha]] YZ125''' was a single cylinder, two-stroke Trial [[motorcycle]] produced by [[Yamaha]] between 1997 and 2019. Max [[torque]] was 17.7 ft/lbs (24.0 Nm) @ 10000 RPM. | |||
== | ==Engine== | ||
[[ | The engine was a [[liquid cooled]] single cylinder, two-stroke. A 54.0mm [[bore]] x 54.5mm [[stroke]] result in a [[displacement]] of just 125.0 cubic centimeters. | ||
[[ | |||
==Drive== | |||
The bike has a 6-speed transmission. Power was moderated via the multiplate wet clutch. | |||
== | ==Chassis== | ||
[[ | It came with a 80/100-21 front [[tire]] and a 100/90-19 rear tire. Stopping was achieved via single disc. hydraulic. in the front and a single disc. hydraulic. in the rear. The front suspension was a kyb® speed-sensitive system inverted fork; fully adjustable while the rear was equipped with a kyb® single shock; fully adjustable. The YZ125 was fitted with a 2.11 Gallon (8.00 Liters) fuel tank. The bike weighed just 190.04 pounds (86.2 Kg). The wheelbase was 56.81 inches (1443 mm) long. | ||
== | ==First Generation== | ||
===1974 YZ125A=== | |||
<gallery mode='packed-hover'> | |||
File:1974-Yamaha-YZ125A-Silver-1490-0.jpg|left|thumb|1974 Yamaha YZ125A in Silver | |||
File:1974-Yamaha-YZ125A-Silver-1490-1.jpg|left|thumb|1974 Yamaha YZ125A in Silver | |||
File:1974-Yamaha-YZ125A-Silver-1490-2.jpg|left|thumb|1974 Yamaha YZ125A in Silver | |||
File:1974-Yamaha-YZ125A-Silver-1490-3.jpg|left|thumb|1974 Yamaha YZ125A in Silver | |||
File:1974-Yamaha-YZ125A-Silver-1490-4.jpg|left|thumb|1974 Yamaha YZ125A in Silver | |||
File:1974-Yamaha-YZ125A-Silver-1490-5.jpg|left|thumb|1974 Yamaha YZ125A in Silver | |||
File:1974-Yamaha-YZ125A-Silver-2047-0.jpg|left|thumb|1974 Yamaha YZ125A in Silver | |||
File:1974-Yamaha-YZ125A-Silver-2047-1.jpg|left|thumb|1974 Yamaha YZ125A in Silver | |||
File:1974-Yamaha-YZ125A-Silver-2047-2.jpg|left|thumb|1974 Yamaha YZ125A in Silver | |||
File:1974-Yamaha-YZ125A-Silver-2047-3.jpg|left|thumb|1974 Yamaha YZ125A in Silver | |||
File:1974-Yamaha-YZ125A-Silver-2047-4.jpg|left|thumb|1974 Yamaha YZ125A in Silver | |||
</gallery> | |||
<br style="clear: left"/> | <br style="clear: left"/> | ||
*SERIAL # 453-000101 - 007730 | |||
===1976 YZ125C === | |||
===1975=== | |||
*SERIAL # 453-100101 - 101620 | |||
== | ===1976=== | ||
*SERIAL # 537-000101 - 014044 | |||
===1977=== | |||
*SERIAL # 1W1-000101 - 015610 | |||
== | ===1978=== | ||
*SERIAL # 2K6-000101 - 015080 | |||
== | ==1979== | ||
[[Image:1979-Yamaha-YZ125-Yellow-0.jpg|left|thumb|1979 Yamaha YZ125]] | |||
[[Image:1979-Yamaha-YZ125-Yellow-3.jpg|left|thumb|1979 Yamaha YZ125]] | |||
[[Image:1979-Yamaha-YZ125-Yellow-4.jpg|left|thumb|1979 Yamaha YZ125]] | |||
[[Image:1979-Yamaha-YZ125-Yellow-5.jpg|left|thumb|1979 Yamaha YZ125]] | |||
[[ |
Latest revision as of 01:08, 22 February 2023
Yamaha YZ125 | |
Manufacturer | |
---|---|
Also called | YZ125X, YZ 125 |
Production | 1997 - 2019 |
Class | Motocross |
Engine | single cylinder, two-stroke |
Bore / Stroke | 54.0mm x 54.5mm |
Compression ratio | 10.7:1 |
Top Speed | 72 mph |
Torque | 17.7 ft/lbs (24.0 Nm) @ 10000RPM |
Ignition | cdi |
Spark Plug | NGK B10EG '76-80 , '81 NGK B9EG '74-75 NGK B9EG '82 , '84-85 , '88-98 NGK BR9EG '83 , '86-87 , '99-08 |
Transmission | Gear box: 6-speed Final Drive: chain |
Suspension | Front: kyb® speed-sensitive system inverted fork; fully adjustable Rear: kyb® single shock; fully adjustable |
Brakes | Front: single disc. hydraulic. Rear: single disc. hydraulic. |
Front Tire | 3.00-21 '76 , '77-80 , '81 , '82 2.75-21 '74-75 80/100-21 '86-87 , '88 , '89-93 , '94-96 , '97-98 , '99-04 , '05-08 90/90-21 '83 , '84 , '85 |
Rear Tire | 6675 '76 , '77-80 , '81 , '82 130/80-18 '83 , '84 , '85 100/90-19 '89-93 , '94-96 , '97-98 , '99-04 , '05-08 3.50-18 '74-75 100/100-18 '86-87 , '88 |
Wheelbase | 56.81 inches (1443 mm) |
Length | 84.09 inches (2136 mm) |
Width | 32.6 inches (828 mm) |
Height | 50.98 inches (1295 mm) |
Seat Height | 38.39 inches (975 mm) |
Weight | 190.04 pounds (86.2 Kg) (dry), 93.9 kg (wet) |
Recommended Oil | Yamalube 10w-40 |
Fuel Capacity | 2.11 Gallon (8.00 Liters) |
Related | Yamaha YZ50 Yamaha YZ60 Yamaha YZ80 Yamaha YZ85 Yamaha YZ100 Yamaha YZ125 Yamaha YZ250 Yamaha YZ400 Yamaha YZ465 Yamaha YZ490 |
Competition | Honda CR125R Kawasaki KX125 Suzuki RM125 |
Manuals | Service Manual |
The Yamaha YZ125 was a single cylinder, two-stroke Trial motorcycle produced by Yamaha between 1997 and 2019. Max torque was 17.7 ft/lbs (24.0 Nm) @ 10000 RPM.
Engine[edit | edit source]
The engine was a liquid cooled single cylinder, two-stroke. A 54.0mm bore x 54.5mm stroke result in a displacement of just 125.0 cubic centimeters.
Drive[edit | edit source]
The bike has a 6-speed transmission. Power was moderated via the multiplate wet clutch.
Chassis[edit | edit source]
It came with a 80/100-21 front tire and a 100/90-19 rear tire. Stopping was achieved via single disc. hydraulic. in the front and a single disc. hydraulic. in the rear. The front suspension was a kyb® speed-sensitive system inverted fork; fully adjustable while the rear was equipped with a kyb® single shock; fully adjustable. The YZ125 was fitted with a 2.11 Gallon (8.00 Liters) fuel tank. The bike weighed just 190.04 pounds (86.2 Kg). The wheelbase was 56.81 inches (1443 mm) long.
First Generation[edit | edit source]
1974 YZ125A[edit | edit source]
- SERIAL # 453-000101 - 007730
1976 YZ125C[edit | edit source]
1975[edit | edit source]
- SERIAL # 453-100101 - 101620
1976[edit | edit source]
- SERIAL # 537-000101 - 014044
1977[edit | edit source]
- SERIAL # 1W1-000101 - 015610
1978[edit | edit source]
- SERIAL # 2K6-000101 - 015080