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92KK 84WW Olaf


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One thing to note on the plug caps.

Sounds like they are original. BUT, the condition they are in can and does destroy the coils. If original a good idea to replace them as they are damaged if loose fitting or used without the bobbins. The description of the inside of the cap eaten away confirms they got used without the bobbins. This is going to cause issues on sparking to needs to be fixed before going too far into other areas. Us of carb cleaner can verify if you do actually have any leaks.

The bobbins are needed for most of the NGK plugs if they show screw threads on the top of the plug, if not fitted you get arcing [ticking sound] and that's got bad consequences for the plug caps and the coils.

BSK Speedworks at Leighton Buzzard can send you HT leads.

Also, if you go checking valve clearances, be very very very careful. The bolts on the cam/valve cover are meant to be very little more than hand tight. Your K has been sitting out so the 'rubber' seats are very likely hardened. Not cheap but replacement of the rubbers is recommended because new ones are soft. One of these bolts goes into a camshaft bearing cap and is very easily stripped with disastrous consequences. New soft washers and little more than hand tightening should mean no problems.



Last edited by 92KK 84WW Olaf on Fri Aug 20, 2021 12:35 pm; edited 1 time in total

    

92KK 84WW Olaf

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@Laitch wrote:
@robmack wrote:By bobbins, I think Olaaf might be referring to the rubber caps . . .
Those parts certainly fall into the bobbinhood category. cheers
No, the bobbins are the little metal bobbins that you need to screw on to NGK D7EA and NGK D8EA plugs. The HT leads need them. Bosch plugs dont.


__________________________________________________
1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011171 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 37,190 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 42,640 miles.

Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500
    

Point-Seven-five

Point-Seven-five
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NGK's terminology for the bobbin is "terminal nut".


__________________________________________________
Present:
1994 K75RT
1991 K100RS
1988 K100RS SE

Past:
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

Beamer

Beamer
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Ah, that's what they are.  I call them nipples !

Bosch plugs have them built in which is really annoying, you can't screw them off for the new plugs.

All new plugs used to have them in the box but someone must have realised they could screw another half a cent out of us by not putting them in. I just bought a pack of 5 since I'm sick of hunting around the box of old plugs to find a spare nipple.

I got the brake fixed , so I should get a road test tomorrow. Very Happy

    

55Back to top Go down   k100 intermittent spark on one cylinder.  - Page 2 Empty Spark problem Fri Aug 20, 2021 5:23 pm

daveyson

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OK I've misunderstood again, I thought this was a well ridden bike of yours that was sat for a while due to the virus lockdown (bikes were banned here at least, in the first lockdown)  Now it's looking like a new to you bike. I'm thinking it wants a full service and then see what issues are left.


__________________________________________________
11/1985 bmw k100rt (late model)  Vin. 0090567
 ~120,000 km
    

Beamer

Beamer
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bikes were banned here at least
How can you ban bikes?  Doesn't anyone rely on them as primary means of transport?

I thought about that in bed last night and thought, that has to be Australia.  I see that it's worse than that. It's Victoria.

I'm very sorry about what has happened to your country. It used to be one of the best places in the world. ( Apart from Melbourne of course. )

I hope you manage to get rid of that tin-pot dictator Dan Jung Un but I don't know how that will happen.

    

57Back to top Go down   k100 intermittent spark on one cylinder.  - Page 2 Empty Spark problem Sat Aug 21, 2021 4:36 am

daveyson

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Today we went into our seventh lockdown, for two weeks (at the moment) I'd rather a hard one for six weeks than a weak one for three months, but this one came from New South Wales cause they were too slow to act. They've been sneaking planes in at night time, I spose the will to get more serious isn't there. There was a rumour I snuck a few rides in  but then didn't want to  chance a fine. I think bikes are allowed this time, not sure.

I'm not dark on Australia over the virus, the death toll is under 1,000 probably not bad compared to most countries, spose we could have done better being like an island.


__________________________________________________
11/1985 bmw k100rt (late model)  Vin. 0090567
 ~120,000 km
    

Laitch

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@Beamer wrote:I hope you manage to get rid of that tin-pot dictator Dan Jung Un but I don't know how that will happen.
scratch


__________________________________________________
1995 K75 81,000 miles
k100 intermittent spark on one cylinder.  - Page 2 Usa-lo10
    

Beamer

Beamer
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It's a satirical reference to Desperate Dan ( Andrews ) , the totalitarian premier of Victoria.

Maybe you do not follow international affairs that closely.

    

Laitch

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@Beamer wrote:It's a satirical reference to Desperate Dan ( Andrews ) , the totalitarian premier of Victoria.
Maybe you do not follow international affairs that closely.
I don't follow politics in Victoria too closely, Beamer, but it's clear that you're not on top of your Google game when it comes to understanding motorcycle travel restrictions Down Under during Covid.

Are you a recent university grad; is that it? Smile


__________________________________________________
1995 K75 81,000 miles
k100 intermittent spark on one cylinder.  - Page 2 Usa-lo10
    

Beamer

Beamer
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I don't follow politics in Victoria too closely,
At all. I got that.

Australia's in pretty bad shape right now. They thought they could keep covid out, and failed.
They are about as far behind in distributing vaccinations of any country which can afford to get any.
As a result they are about where the rest of  the world was 18mo ago. A population totally naive to the virus with very little vaccination.

They've spent 18mo isolated from the world, in and out of pretty drastic lock down in many states and all for nothing.

Leadership on a par with Biden's pull-out "strategy".

Well, all a bit OT.

Cleaning the throttle stop screws did not change anything. ( I also changed the O-rings on the screws ).
I sprayed StartPilot around to check for air leaks and that did not show any change in speed.

Tickover is not too bad but way too slow.

Timing check next but I don't think that's moved.

    

Laitch

Laitch
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@Beamer wrote:
I don't follow politics in Victoria too closely,
At all. I got that.
So you are a new grad. Congratulations!


__________________________________________________
1995 K75 81,000 miles
k100 intermittent spark on one cylinder.  - Page 2 Usa-lo10
    

Tom GR

Tom GR
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G'day All, I cannot see how, by berating Australia's handling of the Covid vaccination regime, will solve the intermittent sparking issue. Cheers Tom


__________________________________________________
1986 K100RT Ex Police (Slightly modified)
2010 Suzuku DL650 V Strom
1992 R100R
    

robmack

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It will allow people to vent off some steam, relax and then get the brain juices flowing again to actually solve the problem.   k100 intermittent spark on one cylinder.  - Page 2 1f60b


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Robert
1987 K75 @k75retro.blogspot.ca
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65Back to top Go down   k100 intermittent spark on one cylinder.  - Page 2 Empty Sparkie no workee Sat Aug 21, 2021 9:16 pm

daveyson

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Come on now Beamer, I think Australia is in exceptionally good shape, that's why we weren't given priority with the vaccines. The lockdowns weren't for nothing, it's meant more people above the ground and fewer people under the ground. I can't speak for everyone, but I prefer living above the ground.

Hopefully the sparking problem disappears after a service. 

Curiosity got the better of me so I used a timing light to see if the HT direction changed after swapping the primary wires. Unfortunately my timing light works in both directions, did you happen to notice a difference?


__________________________________________________
11/1985 bmw k100rt (late model)  Vin. 0090567
 ~120,000 km
    

Beamer

Beamer
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@daveyson wrote:
Curiosity got the better of me so I used a timing light to see if the HT direction changed after swapping the primary wires. Unfortunately my timing light works in both directions, did you happen to notice a difference?

The polarity of the HT DOES change if you invert the primary contacts. That's basic physics. If your strobe light triggers on both polarities that's great.

I think I've clearly noted the differences I observed and Robmack also told me to expect the directional on inductive strobe pick ups.

There's no oddity there. What I have not worked out yet is why it seems not to trigger  properly on the HT output closest to the green wire (pick up in either sense), whether primariy is wired correctly or inverted.

That's not a key problem since the bike is running reasonably well now. At some point in the future I'd like to understand the strobe issue because I don't like things I can't explain.

In fact the strobe was misleading me because I took the apparent misfire at face value at first. At least it did expose a defective coil which needs replacing.

    

67Back to top Go down   k100 intermittent spark on one cylinder.  - Page 2 Empty Sparkie no workee Sun Aug 22, 2021 6:51 pm

daveyson

daveyson
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*



Last edited by daveyson on Thu Aug 26, 2021 8:26 am; edited 3 times in total


__________________________________________________
11/1985 bmw k100rt (late model)  Vin. 0090567
 ~120,000 km
    

68Back to top Go down   k100 intermittent spark on one cylinder.  - Page 2 Empty Sparkie no workee Sun Aug 22, 2021 8:06 pm

daveyson

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Here's some drawings of what I was trying to say, and assuming a faulty spark plug, but could also apply to a faulty lead or coil.

k100 intermittent spark on one cylinder.  - Page 2 F6140410

In post 1 you say you inverted the two low tension connections to the coil and the fault followed the green/yellow connection. And "Does this make sense to anyone?" 

That makes sense, as in the diagram below.  

k100 intermittent spark on one cylinder.  - Page 2 2e1c5910

In post 1 you also say:

  "I swapped the HT leads (...at the coil...) and the problem stayed with the same HT output. So that seems to eliminate the HT lead and plug"

 Comparing the top drawing with the one below, I don't think it does, because the circuit is going through the spark plug in the opposite direction, so that also makes sense.

k100 intermittent spark on one cylinder.  - Page 2 D0c13d10


__________________________________________________
11/1985 bmw k100rt (late model)  Vin. 0090567
 ~120,000 km
    

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