Difference between revisions of "Yamaha DT3"

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{{Motorcycle
|name            = Yamaha DT-3 250
|photo= 1973-Yamaha-DT3-Green-0.jpg
|aka              =
|manufacturer    = Yamaha
|parent_company  =
|production      = 1975
|model_year      =
|predecessor      = [[Yamaha DT2]]
|successor        =
|class            = Enduro
|engine          = Two stroke, single cylinder, air cooled
|bore_stroke      = 71.1mm x 71.1mm
|compression      = 6.8:1
|top_speed        =
|power            = 24.0 HP (17.9 KW) @ 7000RPM
|torque          = 17.7 ft/lbs (24.0 Nm) @ 6000RPM
|ignition        =
|spark_plug      = {{sparkplug|NGK B8ES}}
|battery          =
|transmission    = Gear box: 6-Speed <br>
Final Drive: Chain <br>
Clutch: Wet, multiplate <br>
|frame            =
|suspension      =Front: Telescopic forks <br>
Rear: Dual shocks
|brakes          =Front: Drum <br>Rear: Drum
|front_tire      = {{tire|3.25-19}}
|rear_tire    = {{tire|4.00-18}}
|rake_trail      =
|wheelbase        = 54.69 inches (1389 mm)
|length          = 82.72 inches (2101 mm)
|width            = 35.0 inches (889 mm)
|height          =
|seat_height      = 32.01 inches (813 mm)
|dry_weight      =
|wet_weight      = 122.0 kg
|fuel_capacity    =
|oil_capacity    =
|recommended_oil= Yamalube 10w-40
|fuel_consumption =
|turning_radius  =
|related          =
|competition      =
}}
The '''[[Yamaha]] DT-3 250''' was a Two stroke, single cylinder, [[air cooled]] Enduro [[motorcycle]] produced by [[Yamaha]] in 1975. Max [[torque]] was 17.7 ft/lbs (24.0 Nm) @ 6000 RPM. Claimed [[horsepower]] was 24.0 HP (17.9 KW) @ 7000 RPM. 
==Engine==
A 71.1mm [[bore]] x 71.1mm [[stroke]] result in a [[displacement]] of just 246.0 cubic centimeters. 
==Drive==
The bike has a 6-Speed transmission. Power was moderated via the Wet, multiplate. 
==Chassis==
It came with a 3.25-19 front [[tire]] and a 4.00-18 rear tire. Stopping was achieved via Drum in the front and a Drum in the rear. The front suspension was a  Telescopic forks while the rear was equipped with a Dual shocks. The wheelbase was 54.69 inches (1389 mm) long. 
==1973==
==1973==
[[Image:1973-Yamaha-DT3-Green-0.jpg|left|thumb|1973 Yamaha DT3 in Green]]
<gallery mode='packed-hover'>
[[Image:1973-Yamaha-DT3-Green-1.jpg|left|thumb|1973 Yamaha DT3 in Green]]
File:1973-Yamaha-DT3-Green-0.jpg|left|thumb|1973 Yamaha DT3 in Green
[[Image:1973-Yamaha-DT3-Green-2.jpg|left|thumb|1973 Yamaha DT3 in Green]]
File:1973-Yamaha-DT3-Green-1.jpg|left|thumb|1973 Yamaha DT3 in Green
[[Image:1973-Yamaha-DT3-Green-3.jpg|left|thumb|1973 Yamaha DT3 in Green]]
File:1973-Yamaha-DT3-Green-2.jpg|left|thumb|1973 Yamaha DT3 in Green
[[Image:1973-Yamaha-DT3-Green-4.jpg|left|thumb|1973 Yamaha DT3 in Green]]
File:1973-Yamaha-DT3-Green-3.jpg|left|thumb|1973 Yamaha DT3 in Green
[[Image:1973-Yamaha-DT3-Green-5.jpg|left|thumb|1973 Yamaha DT3 in Green]]
File:1973-Yamaha-DT3-Green-4.jpg|left|thumb|1973 Yamaha DT3 in Green
[[Image:1973-Yamaha-DT3-Green-6.jpg|left|thumb|1973 Yamaha DT3 in Green]]
File:1973-Yamaha-DT3-Green-5.jpg|left|thumb|1973 Yamaha DT3 in Green
[[Image:1973-Yamaha-DT3-Green-7.jpg|left|thumb|1973 Yamaha DT3 in Green]]
File:1973-Yamaha-DT3-Green-6.jpg|left|thumb|1973 Yamaha DT3 in Green
[[Image:1973-Yamaha-DT3-Green-8.jpg|left|thumb|1973 Yamaha DT3 in Green]]
File:1973-Yamaha-DT3-Green-7.jpg|left|thumb|1973 Yamaha DT3 in Green
[[Image:1973-Yamaha-DT3-Silver-332-0.jpg|left|thumb|1973 Yamaha DT3 in Silver]]
File:1973-Yamaha-DT3-Green-8.jpg|left|thumb|1973 Yamaha DT3 in Green
[[Image:1973-Yamaha-DT3-Silver-332-1.jpg|left|thumb|1973 Yamaha DT3 in Silver]]
File:1973-Yamaha-DT3-Silver-332-0.jpg|left|thumb|1973 Yamaha DT3 in Silver
[[Image:1973-Yamaha-DT3-Silver-332-2.jpg|left|thumb|1973 Yamaha DT3 in Silver]]
File:1973-Yamaha-DT3-Silver-332-1.jpg|left|thumb|1973 Yamaha DT3 in Silver
[[Image:1973-Yamaha-DT3-Silver-332-3.jpg|left|thumb|1973 Yamaha DT3 in Silver]]
File:1973-Yamaha-DT3-Silver-332-2.jpg|left|thumb|1973 Yamaha DT3 in Silver
[[Image:1973-Yamaha-DT3-Silver-332-4.jpg|left|thumb|1973 Yamaha DT3 in Silver]]
File:1973-Yamaha-DT3-Silver-332-3.jpg|left|thumb|1973 Yamaha DT3 in Silver
[[Image:1973-Yamaha-DT3-Silver-332-5.jpg|left|thumb|1973 Yamaha DT3 in Silver]]
File:1973-Yamaha-DT3-Silver-332-4.jpg|left|thumb|1973 Yamaha DT3 in Silver
[[Image:1973-Yamaha-DT3-Green-9401-0.jpg|left|thumb|1973 Yamaha DT3 in Green]]
File:1973-Yamaha-DT3-Silver-332-5.jpg|left|thumb|1973 Yamaha DT3 in Silver
[[Image:1973-Yamaha-DT3-Green-9401-1.jpg|left|thumb|1973 Yamaha DT3 in Green]]
File:1973-Yamaha-DT3-Green-9401-0.jpg|left|thumb|1973 Yamaha DT3 in Green
[[Image:1973-Yamaha-DT3-Green-9401-2.jpg|left|thumb|1973 Yamaha DT3 in Green]]
File:1973-Yamaha-DT3-Green-9401-1.jpg|left|thumb|1973 Yamaha DT3 in Green
[[Image:1973-Yamaha-DT3-Green-9401-3.jpg|left|thumb|1973 Yamaha DT3 in Green]]
File:1973-Yamaha-DT3-Green-9401-2.jpg|left|thumb|1973 Yamaha DT3 in Green
[[Image:1973-Yamaha-DT3-Green-9401-4.jpg|left|thumb|1973 Yamaha DT3 in Green]]
File:1973-Yamaha-DT3-Green-9401-3.jpg|left|thumb|1973 Yamaha DT3 in Green
File:1973-Yamaha-DT3-Green-9401-4.jpg|left|thumb|1973 Yamaha DT3 in Green
</gallery>
<br style="clear: left"/>
<br style="clear: left"/>
*Starting Engine#: DT1F-135101
*Starting Engine#: DT1F-135101
==1975==
 
[[Image:1975-Yamaha-DT3-Blue-0.jpg|left|thumb|1975 Yamaha DT3 in Blue]]
 
[[Image:1975-Yamaha-DT3-Blue-1.jpg|left|thumb|1975 Yamaha DT3 in Blue]]
==1975 Yamaha DT-3 250==
[[Image:1975-Yamaha-DT3-Blue-2.jpg|left|thumb|1975 Yamaha DT3 in Blue]]
<gallery mode='packed-hover'>
[[Image:1975-Yamaha-DT3-Blue-3.jpg|left|thumb|1975 Yamaha DT3 in Blue]]
File:yamaha-dt-3-250-1975-1975-1.jpg|600px|1975 Yamaha DT-3 250
<br style="clear: left"/>
File:yamaha-dt-3-250-1975-1975-0.jpg|600px|1975 Yamaha DT-3 250
 
File:1975-Yamaha-DT3-Blue-0.jpg|left|thumb|1975 Yamaha DT3 in Blue
File:1975-Yamaha-DT3-Blue-1.jpg|left|thumb|1975 Yamaha DT3 in Blue
File:1975-Yamaha-DT3-Blue-2.jpg|left|thumb|1975 Yamaha DT3 in Blue
File:1975-Yamaha-DT3-Blue-3.jpg|left|thumb|1975 Yamaha DT3 in Blue
</gallery>
 
The DT's engine was your basic 250cc air-cooled two-stroke single that was dirt reliable plus dirt cheap to operate and maintain. Fed by a 26mm Mikuni carburetor and with 6.8:1 compression, the 246cc (15 seven ports on its "Torque Induction" two-stroke engines). Along with the standard intake, exhaust and transfer ports, Yamaha used an additional two transfer ports along with holes in the piston skirt. These ho would normally be covered by the skirt. This small detail resulted in a slight increase in power, and better throttle response than Yamaha's pre 1972 engines.
 
 
{{Yamaha}}
{{Yamaha}}


[[Category:Yamaha motorcycles|DT3, Yamaha]]
[[Category:Yamaha motorcycles|DT3, Yamaha]]
[[Category:Enduro motorcycles]]
[[Category:1970s motorcycles]]

Latest revision as of 20:05, 23 November 2019

1973-Yamaha-DT3-Green-0.jpg
Yamaha DT-3 250
Manufacturer
Production 1975
Class Enduro
Predecessor Yamaha DT2
Engine
Two stroke, single cylinder, air cooled
Bore / Stroke 71.1mm x 71.1mm
Compression ratio 6.8:1
Horsepower 24.0 HP (17.9 KW) @ 7000RPM
Torque 17.7 ft/lbs (24.0 Nm) @ 6000RPM
Spark Plug NGK B8ES
Transmission Gear box: 6-Speed

Final Drive: Chain

Clutch: Wet, multiplate
Suspension Front: Telescopic forks
Rear: Dual shocks
Brakes Front: Drum
Rear: Drum
Front Tire 3.25-19
Rear Tire 4.00-18
Wheelbase 54.69 inches (1389 mm)
Length 82.72 inches (2101 mm)
Width 35.0 inches (889 mm)
Seat Height 32.01 inches (813 mm)
Weight 122.0 kg (wet)
Recommended Oil Yamalube 10w-40
Manuals Service Manual


The Yamaha DT-3 250 was a Two stroke, single cylinder, air cooled Enduro motorcycle produced by Yamaha in 1975. Max torque was 17.7 ft/lbs (24.0 Nm) @ 6000 RPM. Claimed horsepower was 24.0 HP (17.9 KW) @ 7000 RPM.

Engine[edit | edit source]

A 71.1mm bore x 71.1mm stroke result in a displacement of just 246.0 cubic centimeters.

Drive[edit | edit source]

The bike has a 6-Speed transmission. Power was moderated via the Wet, multiplate.

Chassis[edit | edit source]

It came with a 3.25-19 front tire and a 4.00-18 rear tire. Stopping was achieved via Drum in the front and a Drum in the rear. The front suspension was a Telescopic forks while the rear was equipped with a Dual shocks. The wheelbase was 54.69 inches (1389 mm) long.




1973[edit | edit source]


  • Starting Engine#: DT1F-135101


1975 Yamaha DT-3 250[edit | edit source]

The DT's engine was your basic 250cc air-cooled two-stroke single that was dirt reliable plus dirt cheap to operate and maintain. Fed by a 26mm Mikuni carburetor and with 6.8:1 compression, the 246cc (15 seven ports on its "Torque Induction" two-stroke engines). Along with the standard intake, exhaust and transfer ports, Yamaha used an additional two transfer ports along with holes in the piston skirt. These ho would normally be covered by the skirt. This small detail resulted in a slight increase in power, and better throttle response than Yamaha's pre 1972 engines.