USEFUL DATA
MOTOR
Bore and Stroke - mm ..... ... .... ...........................
..
..
..
.
..
Bore and Stroke -
in
......................
...
......................
..
..
Capacity - cu. in
..
...
..... ...........
...
.. ..
.....
..
..................... .
Compression Ratio .
..
..
..
......... .........
...
..
................ ..
..
... ,
Tappet Clearance,
Inlet and Exhaust - Cold mm .......
..
.
Tappet Clearance,
Inlet and Exhaust - Cold
in
.........
..
Valve timing checked at nil tappet clearance
76 x
82
2.993 x 3.228
45
7.9:1
0.203,0.15
o
OOB,
0.006
Valve lift: Inlet opens 0.190ins (4.83mm) at T.D.C.
Exhaust closes 0.130ins (3.27mm) at
T.O.C.
IGNITION - Timing (Before top centre)
Crankshaft position (Fully advanced) .... ...................... 38
0
Contact Breaker Gap - mm
..
...
..
.... ............................. 0.35 - 0.40
Contact Breaker Gap - in........
..
...
.......
..
...................... 0.014 - 0.016
SPARK PLUGS
Type ....
..
..
..
..
....................
..
.............. ...........
...
..
....
..
...
..
. Champion
N3
Point Gap -
mm
..
. ....
.. ..
.................
..
...
.
.. ..
.......
..
.........
..
0.635
Point
Gap - in
..
.....
..
.......
..
..
..
...
.
..
........
...
..
...
..
..
...........
..
0.025
CAPACITIES
Gas Tank...
..
................... ...... .
.. ..
.....
..
......
....
...........
..
.
..
2V2
U.
S.
galls
Oil
Reservoir
...
... ......... ................
...
....
.
...
.. .. ..
......
... ...
... 4.B U.S. pints
Gearbox
-
c.
c. ... .......
.. ..
.....
..
............ ..... .
..
...........
...
.
...
..
500
Primary
chaincase (Initial fill) - e.c..... .
...
..
...
................ 150
Front forks (each leg) - c.c.
.. ..
.............
.. ..
...............
..
..
190
Front brake hydraulic system -
C.
c. ......
..
....
..
..............
Ap
prox 189
(1fJ
imperial pint)
CARBURETORS
Amal Type ....... .... .................. ............
..
......... ..
..
.......
..
"
R2930/1,
L2930/2
Main
Jet
..
.....
..
.... .... ............
..
............ ...............
...
..
....
..
200
Needle Jet .........
...
..
..
...... .
.. ..
.
..
.
...
..
..
.
...
.... ..................... .105 (2928/030)
Needle Type.. .....
..
..
..
... ...
..... ................................ .... .... 2C3
Needle Position..............
..
.
..
.................. ... ..
...
.. ..
...
....... 2
Throttle Valve Cutaway..........
...
....... ................... ...... 3
Pilot Jet
...
.......... ... ............................ ...... ............. .....
...
25
Starter Jet.......
..
.
..
.
..
.. ..... ....................... ......
..
..... ..........
50
Primary Air
Jet..
.......................................................... 3.5
6
To Next Page
Loading...
