81 srx has no spark
Posted: Mon Jun 01, 2015 10:06 pm
went through wiring and still have no spark, any suggestions?
viewtopic.php?f=2&t=1529
No Spark
Two different circuits. One for lights, and one to the CDI for spark. Check the CDI for a single black wire. Disconnect this and see if you have spark. If so, the problem is in your kill switches, ignition switches, connections or wiring harness somewhere. If still no spark, check your CDI, Coils, or magneto. Becareful when checking for spark by disconnecting the black wire, as there will be no way to kill the engine if it happens to start.
These have a history of the stator "imbedded" (mounted permanently) pulser coils losing contact thru thermal expansion. Sometimes engine heat makes it quit after a few minutes and I've heard of a few that due to how these particular ones became "disabled" (lost pulser ground to stator mounting plate)
-CDI’s
1976 SRX440 P#888-85540-10-00 T1A02-06-505
1977-79 Exciter T1A01-18-605
1977 SRX440 P#8F2-85540-10-00 T1A02-11-608
1978 SRX440 P#8G9-85540-10-00 T1A02-13
1979 SRX440 P#8G9-85540-10-00
1980 SRX440 P#8K2-85540-10-00 T1A01-32-906
1980 SS440 P#8K4-85540-10-00
1981 SS440 P# 8H4-85540-20-00
1982 SS440 P# 8N4-85540-20-00
1981 SRX 440 P#8K4-85540-10-00 T1A01-33
1981 SRX 440 (Updated) P#8R9-85540-10-00 it is used with the 8R9 stator
1983-86 Vmax P#8U9-85540-10-00 TIA01-43
1987-1991 Vmax P#83H-85540-10-00
CDI's for the 81.The original had only 8 degrees advance, and the 8R9 the updated one had about 20 degrees advance and retarded back after 7000 rpm's to 8 degrees at 9000 rpm's . The 8K4 or original one is the same one that the 80 SS440 used as well.
-Stators 5 different
1981 SRX (Original) P# 8K4-85500-10-00
1981 SRX (Updated) P# 8R9-85500-10-00
1983 P# 8U9-85510-10-00 without the hand warmer coil
1984-86 P# 80N-85510-10-00 with the hand warmer coil
1987-1991 P# 83H-85510-10-00Yamaha changed the charging coil in the stator to a higher output coil, by doing this the secondary coil output went up from 18,000 volts to 28,000 volts ,but you also have to use the 1987-91CDI as well as, it is different to accommodate the higher voltage of the charging coil in the stator.
F.Y.I. Double check P#'s !