AJS G2 - Page 10

Piston Size
Skirt diameter (taken at right angle
to gudgeon pin top of the skirt).
High limit
Low limit
Piston Rings
Compression rings
Diameter
Width
Radial Thickness
Scraper ring
Diameter
Width
Radial Thickness
Piston Ring Gap
Ignition Timing
Valve Timing
Inlet valve opens
Exhaust valve closes
Spark Plug
Chain Sizes
Front chain
Rear chain
Gear Ratios
Internal Ratios
TOP
Third
Second
First
Actual Ratios
Top
Third
Second
First
Sprocket Sizes
Engine
Clutch
Final drive
Rear wheel
2.8286"
2.8276"
72 mm.
3
/
64
"
.151"—.109"
72 mm.
E "
.109"—.101"
.008"—.013"
¼" B.T.D.C.
40° B.T.D.C. with .010" rocker
40° A.T.D.C. clearance.
K.L.G. FE 80
.315" x .628" Duplex (72 links)
½" x .305" (123 links)
1 to 1
1.30 to 1
1.85 to 1
2.92 to 1
6.39 to 1
8.32 to 1
11.82 to 1
18.68 to 1
22 teeth
46 teeth
18 teeth
55 teeth
350 c.c. Heavyweight (Long Stroke) Model
Cylinder bore size
Compression ratio (1956 onwards)
Piston skirt diameter—Top
Piston ring gap
Gudgeon pin bush size
2.7197—2.7187"
7.4 to 1
2.7180—2.7172"
.008"—.0013"
d" + .0005"
d" – .00025"
8
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