Section 04
ENGINE
Sub-Section 05
(ROTARY VALVE)
04-05-10
Rotary Valve Timing
CAUTION : Never use the ridge molded in
crankcase as a timing mark.
The following tools are required to measure rotary
valve opening and closing angles in relation with
MAG side piston.
Rotary valve must be set so that timing occurs as
follows :
For the following instructions, let’s use these
specifications as example
:
OPENING
:
130
°
BTDC
CLOSING
:
65
°
ATDC
Proceed as follows
:
– Turning crankshaft, bring
MAG side
piston to
Top Dead Center using a TDC gauge.
1. TDC gauge on MAG side. Bring piston to TDC
– For
opening
mark, first align 360
°
line of de-
gree wheel with BOTTOM of
MAG
side
inlet
port. Then, find 130
°
line on degree wheel and
mark crankcase at this point.
EXAMPLE
Step
: Bottom of MAG inlet port. Align 360
°
line of degree wheel
here
Step
: Find 130
°
on degree wheel and mark here
1. Opening mark
NOTE :
Do not rotate the crankshaft.
– For
closing
mark, first align 360
°
line of degree
wheel with TOP of
MAG side
inlet port. Then,
find 65
°
line on degree wheel and mark crank-
case at this point.
ENGINE TYPE
TIMING
OPENING
BTDC
CLOSING
ATDC
717
147 ± 5°
65 ± 5°
787
146.5 ± 5°
64 ± 5°
-
360
350 34
0
330
32
0
31
0
3
0
0
2
9
0
2
8
0
2
7
0
2
6
0
2
5
0
24
0
23
0
220
21
0
20
0
19
0
18
0
17
0
16
0
15
0
14
0
1
3
0
1
2
0
1
1
0
1
0
0
9
0
8
0
70
60
50
40
30
20
10
1 0
2 0
3 0
40
50
6
0
7
0
8
0
9
0
1
0
0
1
1
0
1
2
0
1
30
14
0
15
0
16
0
17
0
18
0
19
0
20
0
21
0
22
0
23
0
2
4
0
2
5
0
2
6
0
2
7
0
2
8
0
2
9
0
3
0
0
31
0
32
0
3 3
0
3 4 0
3 5 0
3 6 0
A00B44A
295 000 007
295 000 065
1
F01D2IA
1
F01D2IA
1
2
'
Summary of Contents for Challenger 5896
Page 1: ......
Page 2: ......
Page 3: ...219 100 044 0 0 0 1996 Shop Manual 0 R ...
Page 152: ...Section 08 ELECTRICAL Sub Section 03 IGNITION SYSTEM 08 03 2 ELECTRICAL BOX Sportster F04H11S ...
Page 154: ...Section 08 ELECTRICAL Sub Section 03 IGNITION SYSTEM 08 03 4 ELECTRICAL BOX Speedster F04H26S ...
Page 251: ...Section 11 HULL DECK Sub Section 01 COMPONENTS 11 01 5 F04L3IS Loctite 242 ...
Page 274: ......