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1991 900ss Refurb.

Discussion in 'Supersport (1974-2007)' started by portboy, Nov 19, 2019.

  1. Yes, they are winging there way to me as we speak, Exy has explained the fitment of the negative cable it needs to be re-routed as to avoid touching the belt covers .
     
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  2. I really wish Stu's cables had been available when I had my SS.
    Even with a new battery it was a seriously reluctant starter and when it did start, it was often as I took my finger off the button, as though the current bring taken by the starting circuit left insufficient for the ignition system.
     
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  3. correct, you have that right as far as i'm interned. There are people running resistors in cap, plug and lead sometimes without realising they don't need to.
     
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  4. Here is me caps and coils.....

    P1040089.JPG

    P1040090.JPG
     
  5. :upyeah:they could be standard - no idea. Same resistance as std (5K ohms). Whatever you do, don't try unscrewing the leads from the coils as it will wreck them - they are not the screw in type - coils are original by the looks.
     
  6. They are the OEM type that were fitted to mine. Junked straight away for NGK caps.
     
  7. Even the later black coils were better than the light grey ones.

    If not screw-in HT lead type, then the leads are most likely carbon ones which can break down when new, let alone when old.
     
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  8. they were just ordinary wire Al, and not always copper from memory.
     
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  9. When I got it, my SS was so prone to fouling that it came with a spare plug under the seat.
    I got some California Cycleworks coils and it was completely cured. It idled and picked up better too.
     
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  10. The caps are Bosch 5 ohms rated, unscrewed the caps and revealed wire HT leads the front pot cap showed corrosion on the self tapped screw, the wire contact in the lead also signs of corrosion, which won't help . Fitted the new plugs no different no sign of firing, just wetted the new plugs (resistor type). Next step ordinary plug caps to be ordered.
    Exy's cable kit has arrived so will be studying them for fitting later, getting a bit cold in the cave.
     
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  11. Ouch, yes Exy has warned me so fully expecting to replace them. The bike has been laid up since 2012, but the seller in his advert said he fired it up prior to selling it. Funny it was shipped to me minus the battery ? Unless he clipped a car battery onto it , i stole the bike from him so no complaints.
     
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  12. Chilly caves are no fun...
     
  13. Re: cap resistor - there's a 'K' in there Tony :upyeah: haven't read whole thread - have you got any sign of a spark on either cylinder?
     
  14. Hi Chris, yes both are sparking outside the pots.
     
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  15. Thanks Chris.....the ones I removed from mine were in fact a bodge of up the rubber caps with the carbon leads.....it was no wonder they wouldn't stay on the screws.

    Plugs, caps and leads were the first things I dealt with when I got the bike.

    Interestingly I did also have some brand new Champion plugs of the right OEM reference number but the sparks they produced were tiny compared with the correct NGK ones.

    AL
     
    #55 Arquebus, Nov 26, 2019
    Last edited: Nov 26, 2019
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  16. It is odd IMO that both spark outside but possibly break down inside.

    Even a poor spark should get some sort of bang unless the coils etc are so weak.

    It might be a good idea to see if they are sparking at the right time if not already checked.

    Also check the pickup wiring.....are they sending to the wrong coil and HT lead?
     
    #56 Arquebus, Nov 26, 2019
    Last edited: Nov 26, 2019
  17. good shout, do you mean swop leads around (if poss) ?
     
  18. NGK plugs should be DCPR8E (either 4339 or 4179 depending on the plug cap type.....4339 has a removable nut, 4139 nut is not removable)
    I fitted LB05F or LD05F red caps (with 5K resistor and seals) to fit the 4339 plugs.......can't remember if it was a B or a D though.....B is 10-12mm plug thread D is 14mm. Probably B.
     
  19. Why not? Worth a try.

    Try checking the LT coil wiring as well as those from the pick-ups......maybe the pickups have got reversed sending the signal to the wrong coil and HT lead.
     
  20. Got those plugs so i don't need resistored caps i have ordered NGK non resistor right angled caps.
     
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