86 gsxr400

[kiwi cowboy]

hi all.
i just picked up a 86 gsxr400 that hasnt been running for a while.
well i hooked a battery up with jumpers to see whot would happen and after a bit of winding it started but it didnt seem to be firing on the middle 2 cilinders [could touch the headers on 2 and 3 and wernt as hot as 1 and 4.
i looked at the coils and whot i noticed is the have a + and - sign on them.
now there is a orange/white wire goes to each coil but said wire goes onto the - on one coil and the + on the other. is this right or should the wires go to the same on each coil?.
also when its running and i disconect the jump battery it cuts out strait away.
any ideas on that? cheers

[geoffm]

Coils probably crook. They are notoriously weak on these. Get a replacement from a wrecker with equal resistance. I think my Impulse has a GSX1100 coil and some Honda coil.
G

[wildpudding]

If your coils are fine (replace them first), check your trigger coils, or pick up coils in the engine. Had one randomly die on my Impluse when I had it, caused no power to get to one coil = no spark for 2 cylinders.

Stefan

[kiwi cowboy]

Coils probably crook. They are notoriously weak on these. Get a replacement from a wrecker with equal resistance. I think my Impulse has a GSX1100 coil and some Honda coil.
G

cheers geoffm
i think ive sorted it.
i put the same wires on the same + on each and sorted the number 1 plug out [was x threaded] and now runs on all 4 but will keep your advise for the future'
i have some discs and will mail them up thanks for help