Serial Numbers stamped on the engine identifies the year,model & production numbers: Example: 60A27**
Year would be:1960 , Model would be: A , Production numbers would be: 27**
Serial number stamped in the boss on top left of crankcase
Model Size of the Harley Topper Scooters 1960 to 1965 Two Cycle Engine
All Topper engines used a Reed Valve Intake (the same reed plate assembly was
used on all models A, AU, AH.
The AU used a smaller-based manifold and
the A and AH used different air intake manifolds with the reed valve setup.)
When the Topper is stopped, the transmission will not take hold over 1800 rpm.
(The piston and rings are the same as the Harley lightweights
1953 to 1959 ST and 1960 super 10, 165cc engines.) some other internal parts
are interchangeable as well.
(Little over 6 hp, compression ratio 6.6 to 1)
Note: 1960 and 1961 Riders Manual for the A, AU,
Horsepower: (N.A.C.C. Rating) 2.26
10 cubic inches, 165 cc.
Bore: 2.375 inches
Stroke: 2.281 inches
Top speed: does a little better than 45 miles per hour.
What made this 10 cubic inch 165 cc motor low in hp: low compression
head (the A and the AU used the same head), small carburetor intake passage , small air intake manifold, small air intake hose , and long low resistance muffler.
Weight: 237 lbs
Gas consumption: 80 miles per gallon, advertised to get 100 miles per gallon.
Sold new for under: $450.00
Spark plug type: Harley-Davidson no. 4 size, 14mm, Gap .040 to .045 inch
Circuit point gap: .018 inch
Ignition Timing: 5/64 (.078 ) to 7/64 ( .110 ) inches before piston top dead center.
Number of Sprocket teeth: Transmission drive sprocket 14, Rear wheel 63.
Overall ratio: Maximum 18.0, Minimum 5.9
1. 1960 and 1961 Specification sheet:
2. 1960 specification sheet:
Model: AH 1961
to 1965 Style Master
HIGH COMPRESSION HEAD
1. Topper engines are:
Horizontal 165cc single cylinder two stroke engine requiring
|2. Bore: 1960 to 1961 A , AU ..(60.30mm)
2.375 in. or 2 3/8"
1961-AU , 1962-AH , AU ..(60.325mm) 2.377 in.
The engine is of a short stroke design: ...(57.94mm) 2.281 in. or 29/32"
|3. Piston Displacement: ..1960 - 1961 A , AU , AH , and 1962 AH , AU ..( 165cc ) 10.0 cubic in.|
|4. Compression Ratio: 1960 -1961 A ,
AU & 1962 AU ....Full Stroke -6.6 to 1 After port close -5.0 to 1
1961 AH & 1962 AH ....Full Stroke -8.0 to 1 After port close -5.9 to 1
5. Harley Davidson Spark
Plugs: All Topper plugs are 14mm.
All plugs fit: 1960 to 1965 A , AU , AH
|6. Drive-primary: V Belt
Final Drive: 1/2 in. pitch roller chain.
Power to the rear wheel is automatically controlled by the infinitely variable drive system.
Pitch diameter of the belt pulleys are centrifugally changed from 18 to 1 (low) to 6 to 1 (high range)
|7. Starting method: Pull start re-coil system...same as push lawn mower with pull rope & handle.|
8. Transmission: Scootaway automatic
transmission or CVT (constant velocity transmission).
|9. Tire size: Originals had a diamond
pattern. size: 4.00 X 12.
The overall diameter of the Tire is 20"
|10. Tire pressure: Front 14 psi , Rear
16 psi , figured for 150 pound person.
add 2 pounds in rear and 1 pound in front for every 50 pounds added.
|11. Number of sprocket teeth: 1960-1961-
A , AU , AH & 1962 AU.
engine 14 , rear wheel 63.
1962 AH , engine 16 , rear wheel 63.
|12. Fuel capacities: 1.7 U.S. Gallons
with a .5 U.S. pint reserve.
Note: Gas to Oil Mixture Ratio:
Motor oil type recommended SAE 40 wt: 91844-59
click on images to enlarge
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|13. The front body: front fender,splash shield & floorboards are made of stamped steel. The front splash shield is sealed with a sponge rubber sealer to keep out water and dirt with in the joints.|
|14. The engine cover & body made of high impact resistance fiberglass.|
|15. Lighting: The front head light uses a 21-21 candle power bulb and has a high and low beam which is controlled by a switch located on the left floor board and is foot operated. The rear taillight is a combination tail and stop light it uses a bulb that is 21.3 candle power and which is controlled by a switch located under the right floor board and connected to a foot operated pedal on the right floor board.|
|16. Generator: Magneto-generator.
Two Low-tension coils. One operates headlight and tail light, the other
supplies current for high-tension ignition coil and also operates stop
light through an added circuit breaker.
Maximum output of each coil. 3.2 amperes at 7 volts.
|17. Horn: 6 volt made by "Hella" . The Horn is actuated by a switch on the handlebar.|
|18. Basic dimensions: Wheelbase-51 1/2",
Overall Length-75", Overall Width-24",Overall Height-37",Saddle
Height-30", Road Clearance-3 1/2".
Overall Weight-237 lbs.
|Harley Topper Color Data CLICK HERE: color chips, paint part numbers etc.|
|Spare parts catalog data||Jiffy Stand
|Speedometer Data||Handle Bar & cover id||Electrical Systems Data||Color Chips|
Buddy Seat Footrest Kits:
Sheets will open in separate page
1. Specification sheet**......* 2. Topper tools *.....** 3. Topper side car
..... 1.**..........** 2.**........** 3.