11.6
Battery and Electrical Systems
Ignition Timing Chart
Convert the ignition timing specification from degrees BTDC to
either inches or millimeters, then use a dial indicator to verify
timing marks.
NOTE: Always disconnect the TPS on carbureted
engines prior to checking ignition timing.
600 CFI / C
ARBURETED 700 CFI 800 CFI
ROD/STROKE (mm)
128mm ROD
64mm STROKE
128mm ROD
68mm STROKE
132mm ROD
70mm STROKE
Degrees BTDC MM Inches MM Inches MM Inches
1 0.0061 0.0002 0.0066 0.0003 0.0067 0.0003
2 0.0244 0.0010 0.0262 0.0010 0.0270 0.0011
3 0.0548 0.0022 0.0590 0.0023 0.0607 0.0024
4 0.0974 0.0038 0.1048 0.0041 0.1078 0.0042
5 0.1522 0.0060 0.1637 0.0064 0.1684 0.0066
6 0.2190 0.0086 0.2356 0.0093 0.2424 0.0095
7 0.2979 0.0117 0.3205 0.0126 0.3298 0.0130
8 0.3889 0.0153 0.4184 0.0165 0.4305 0.0169
9 0.4919 0.0194 0.5291 0.0208 0.5445 0.0214
10 0.6068 0.0239 0.6528 0.0257 0.6717 0.0264
11 0.7336 0.0289 0.7892 0.0311 0.8121 0.0320
12 0.8723 0.0343 0.9383 0.0369 0.9656 0.0380
13 1.0227 0.0403 1.1001 0.0433 1.1321 0.0446
14 1.1849 0.0466 1.2745 0.0502 1.3115 0.0516
15 1.3586 0.0535 1.4614 0.0575 1.5038 0.0592
16 1.5439 0.0608 1.6606 0.0654 1.7089 0.0673
17 1.7406 0.0685 1.8722 0.0737 1.9266 0.0758
18 1.9487 0.0767 2.0960 0.0825 2.1569 0.0849
19 2.1681 0.0854 2.3319 0.0918 2.3996 0.0945
20 2.3986 0.0944 2.5798 0.1016 2.6547 0.1045
21 2.6402 0.1039 2.8395 0.1118 2.9220 0.1150
22 2.8927 0.1139 3.1110 0.1225 3.2013 0.1260
23 3.1560 0.1243 3.3941 0.1336 3.4927 0.1375
24 3.4300 0.1350 3.6887 0.1452 3.7958 0.1494
25 3.7146 0.1462 3.9946 0.1573 4.1106 0.1618
26 4.0096 0.1579 4.3117 0.1698 4.4369 0.1747
27 4.3149 0.1699 4.6399 0.1827 4.7746 0.1880
28 4.6303 0.1823 4.9789 0.1960 5.1235 0.2017
29 4.9558 0.1951 5.3287 0.2098 5.4835 0.2159
30 5.2911 0.2083 5.6891 0.2240 5.8543 0.2305
31 5.6361 0.2219 6.0598 0.2386 6.2358 0.2455
32 5.9907 0.2359 6.4408 0.2536 6.6278 0.2609
33 6.3546 0.2502 6.8318 0.2690 7.0302 0.2768
34 6.7278 0.2649 7.2326 0.2847 7.4427 0.2930
35 7.1099 0.2799 7.6431 0.3009 7.8652 0.3097
36 7.5010 0.2953 8.0632 0.3174 8.2974 0.3267
37 7.9007 0.3111 8.4925 0.3343 8.7392 0.3441
38 8.3089 0.3271 8.9308 0.3516 9.1903 0.3618
39 8.7254 0.3435 9.7381 0.3692 9.6506 0.3799
40 9.1501 0.3602 9.8340 0.3872 10.1198 0.3984