Welcome to the 1968 Yamaha DT1 Forum. The 1968 was the very first Yamaha Enduro ever made. It is considered by many to be the "Holy Grail" of Enduros. Feel free to post anything related to this model in the category. Anything new, will be added to this section. The factory Yamaha Paint was called "Pearl White". The USA Vin range was: DT1-00101 to 14090. If you see any errors, please contact me privately.

1968 Yamaha DT1 Specifications

⭐️Genuine Yamaha Tuning (GYT) Kit Installed

Model 1968 Yamaha DT1

Dimensions:

Overall Length 81.1 In. 2,060MM.

Overall Width 35.0 In. 890MM.

Overall Height 44.5 In. 1,130 MM.

Wheelbase 53.6 In. 1,360 MM.

Min. Ground Clearance 9.6 In. 245MM.

Weight:

Gross 264 Lbs. 120 Kg.

Net 240 Lbs/109 Kg. ⭐️251 Lbs/113 Kg.

Performance:

Max, Speed 70 MPH (112Km/H) +

Fuel Consumption 94MPG @25MPH or 40KM @ 40KM/H

(On paved level roads)

Climbing Ability 35 Degree

Min. Turning Radius 82.6 In. / 2,100 MM.

Braking Distance 40 ft. at 30MPH / 12.5M at 50KM/H

Engine:

Model DT1

Type 2 Stroke, Gasoline

Lubricating System Separate (Yamaha Autolube)

Cylinder Single, forward inclined 5 Port

Displacement 15 cu. in. (246cc)

Bore X Stroke 2.77 X 2.52 In. (70 X 64MM)

Compression Ratio 6.8:1 ⭐️8.2:1

Max Power 18.5PS/6,000 RPM ⭐️30PS/7,000RPM

Max Torque 16.8 PS/5,000 RPM 2.3KG-m/5,000 RPM

⭐️22.4 Ft-Lbs/6,500 RPM 3.1KG-m/6,500 RPM

Piston Skirt Clearance 0.0016 - 0.0018 In. 0.040 - 0.045MM

⭐️ 0.0016 - 0.0020 In. 0.040 - 0.050MM

Starting System Primary-Coupled Kick

Ignition Timing B.T.D.C 0.126 In. 3.2MM / ⭐️0.091 In. 2.3MM

NGK Spark Plug & Gap B7E 0.5-0.6MM / ⭐️ B9E 0.5-0.6MM

Contact Break Point Gap 0.011 - 0.013 Inch / 0.30 - 0.35 MM

Carburetor:

Type VM26SH (214E) ⭐️VM30SH (214M)

Main Jet # 150 ⭐️# 210

Jet Needle 5D1-3 Stages ⭐️8J-5D05-3

Air Jet 0.5

Needle Jet 0-2

Cut Away 2.5 ⭐️3.5

Pilot Jet (#) 35 ⭐️80

Air Screw (turns out) 1 1/2 ⭐️ 1/2

Starter Jet (#) 60

Intake:

Air Cleaner Dry, Paper Filter Type

Transmission:

Clutch Wet, Multiple Disk

Primary reduction system Helical Gear

Primary reduction ratio 3.095 / (65/21) Teeth

Trans Oil Capacity 1,000cc (1.06 Qts)

Gear Box:

Type Constant Mesh, 5 Speed Forward

1st Gear teeth & Ratio 29/13 20.25 ⭐️29/13 21.70

2nd Gear teeth & Ratio 26/16 14.75 ⭐️26/16 15.81

3rd Gear teeth & Ratio 23/19 10.99 ⭐️23/19 11.78

4th Gear teeth & Ratio 21/21 9.08 ⭐️21/21 9.73

5th Gear teeth & Ratio 19/23 7.50 ⭐️19/23 8.04

Secondary reduction system Chain

Secondary reduction ratio 44/15 2.93 ⭐️44/14 3.143

Chassis:

Frame Tubular-Double Loop

Front Suspension System Front Telescopic fork

Rear Suspension System Swinging Arm

Fork Oil Capacity 210cc (7.1 Oz.) (10W30 Oil)

Front Cushion System Coil Spring / Oil Damper

Rear Cushion System Coil Spring / Oil Damper

Steering System:

Steering Angle 49 Degrees both left & right

Caster 60.5 Degrees

Trail 5.12 In. / 130MM

Braking System:

Type of brake Internal Expansion

Front Operation System Right hand operation

Rear Operation System Right foot operation

Tire Size:

Front 3.25 - 19 - 4 PR

Rear 4.0 - 18 - 4 PR

Front Tire Pressure 12 - 14 P.S.I

Rear Tire Pressure 16 -18 P.S.I

Oil Pump:

Adjustment Stroke Min 0.20 - 0.25 MM

Adjustment Stroke Max 1.85 - 2.05 MM

Dynamo:

Model FZA-1BL

Manufacturer Mitsubishi Elec.

Battery:

Model MV1-6D

Manufactuer Nippon Battery

Lighting:

Head Light 6V 35W/35W

Tail Light 6V 5.3W

Stop Light 6V 17W

Meter Light 6V 3W X 2

Tanks:

Gasoline Tank Capacity 2.5 Gallons (9.5 Liters)

Oil Tank Capacity 1.7 Quarts (1.6 Liters)

Chain:

Tension (Up & down free play) 20MM (25/32)

The 1968 Yamaha DT1 Service Manual is: CLICK HERE

The 1968 Yamaha DT1 Service Manual Supplement is located: CLICK HERE

The 1968 Yamaha DT1 Rider's Manual is: CLICK HERE

The 1968 DT1 - 1968 DT1B Combined Service Manual is Located: CLICK HERE

The Combined 1968-1971 DT1 Service Manual is: CLICK HERE

The 1968 Yamaha DT1 Parts Manual is: CLICK HERE

The 1968 Yamaha DT1 (JDM) Parts Manual is Located: CLICK HERE

The USA 1968 Yamaha DT1 Brochure is: CLICK HERE

The Australia 1968 Yamaha DT1 Brochure is Located: CLICK HERE

The 1968 Yamaha DT1 dealership promo release flyer is located: CLICK HERE

The 1968 Yamaha DT1 Red Enduro flyer is located: CLICK HERE

The 1968 Yamaha DT1 Enduro flyer is located: CLICK HERE

The 1968 Yamaha DT1 Trail flyer is located: CLICK HERE

The 1968 Yamaha DT1 GYT KIT install Article is: CLICK HERE

The 1968 Yamaha DT1 Frame Lowering Article is: Click Here

The Australia Twho Wheels 1968 Yamaha DT1 Article is Located: CLICK HERE

The 1968 Yamaha Oil Pump Color Codes are: CLICK HERE

The 1968 Yamaha DT1 Article Cycle Road Article is: CLICK HERE

The 1968 Yamaha DT1 Cycle Guide Test is: CLICK HERE

The 1968 Yamaha DT1 Advertisement 1 is located: CLICK HERE

The 1968 Yamaha DT1 Advertisement 2 is located: CLICK HERE

The 1968 Yamaha DT1 Advertisement 3 is Located: CLICK HERE

The 1968 Yamaha DT1 Advertisement 4 is Located: CLICK HERE

The 1968 Yamaha DT1 Sales Tag is Located: CLICK HERE

The 1968 Yamaha DT1 Owner's Warranty Card is located: CLICK HERE

The 1968 Yamaha DT1 (JDM) Postage Stamp is Located: CLICK HERE

The 1968 Yamaha DT1 VMX Poster is Located: CLICK HERE

The 1968 Yamaha DT1 JDM Poster is Located: CLICK HERE

The 1968 Yamaha DT1 Postcard is Located: CLICK HERE

The 1968 Yamaha DT1 Match Book is Located: CLICK HERE

The 1968 Yamaha DT1 Dealership Lighter is located: CLICK HERE

The 1968 Yamaha DT1 Parts Store is Located: CLICK HERE