new coil

[Guest]

Got a new coil off ebay for only $40., but haven't been able to determine ohms. part# is 33410-31311 (it's an ND) Looked part number up on Alpha sports tells me the cost and seems to be oem, but doesn't tell me what it fits. Want to put in on 79 850 but just want to be sure ohms are enough or not too much? 79 of course has points. terrylee

[Nessism]

That particular coil is for an electronic ignition. The resistance will be slightly lower than on a bike that uses points. Suzuki's coils were pretty similar resistance wise but you might want to measure to be sure. My guess is it will work with points, but I'd compare the measured resistance value and compare to the service manual coil spec for 1979 to be safe.


Google search "33410-31311"...

http://www.andersonvintageparts.com/index.php?crn=5&rn=56943&action=show_detail

GSX-R1100 GSX-R-1100 GSX-R 1100 - Years 1986 1987 1988
GSX-R750 GSX-R-750 GSX-R 750 - Years 1986 1987
GSX-R750R GSX-R-750R GSX-R 750R - Years 1986
GSX1100EF GSX-1100EF GSX 1100EF " Katana " - Years 1986
GSX1100 GSX-1100 GSX 1100 " Katana " - Years 1975
GSX1150ES GSX-1150ES GSX 1150ES - Years 1986
GSX750ES GSX-750ES GSX 750ES - Years 1986
GSX750S GSX-750S GSX 750S " Katana " - Years 1982 1983
GSX750T GSX-750T GSX 750T - Years 1983
GS1000G GS-1000G GS 1000G - Years 1982 1983
GS1100E GS-1100E GS 1100E - Years 1982 1983
GS1100ES GS-1100ES GS 1100ES - Years 1984
GS1100G GS-1100G GS 1100G - Years 1982 1983 1986
GS1100GK GS-1100GK GS 1100GK - Years 1982 1983 1984
GS1150EF GS-1150EF GS 1150EF - Years 1986
GS1150ES GS-1150ES GS 1150ES - Years 1985
GS650G GS-650G GS 650G " Katana " - Years 1981 1982 1983
GS650GL GS-650GL GS 650GL " Katana " - Years 1981 1982 1983 1999
GS650GT GS-650GT GS 650GT " Katana " - Years 1981 1982 1983
GS700E GS-700E GS 700E - Years 1985
GS750ES GS-750ES GS 750ES - Years 1983 1986
GS750S GS-750S GS 750S - Years 1986
GS750T GS-750T GS 750T - Years 1982
GS850G GS-850G GS 850G - Years 1982 1983 1986
GS850GL GS-850GL GS 850GL - Years 1983
GV1200GL GV-1200GL GV 1200GL " Madura " - Years 1985 1986
GV700GL GV-700GL GV 700GL " Madura " - Years 1985
XN85 XN-85 XN 85 " TURBO " - Years 1983
GS1100GL GS-1100GL GS 1100GL - Years 1982 1983

[terrylee]

Nessium, thanks much! I was worried about that being the case, will check resistance and see what I get. terrylee

[koolaid_kid]

Ed, won't he have heat issues with too low an impedance in the line? The electronic ignition coils have an impedance of 3 Ohms and the points ignition coils have an impedance of 5 Ohms.
You can run 5 Ohm coils on an electronic ignition system with reduced output voltage, but I don't think you can go the other way.

[Nessism]

Ed, won't he have heat issues with too low an impedance in the line? The electronic ignition coils have an impedance of 3 Ohms and the points ignition coils have an impedance of 5 Ohms.
You can run 5 Ohm coils on an electronic ignition system with reduced output voltage, but I don't think you can go the other way.

You need to check the service manual specs. From the GS850 service manual: Specs for the '79 coils are "approximately 4 ohms", later electronic ignition coils state "3 - 5 ohms".

[terrylee]

will do. terrylee