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1Back to top Go down    Injection cleaner or clean the injector on Tue Nov 01, 2016 5:27 pm

ainsjac

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Just asking the question... what is the current thinking on getting injectors clean? Do I put a bottle of magic stuff into the tank and run it through or is that just wasting money. Should the injectors be taken out and professionally cleaned. The old basic bike does the round town duty and also spends a fair bit of time sitting at home. I also use lead additive in the fuel as the bike was built in 1983 and not prepared for unleaded.


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AINSJAC
1983 K100 basic vin 0003960 colour red
1987 K100RT vin 0094685 colour, orange peel, sorry, pearl
    

Born Again Eccentric

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I put about 2 tanks of gas through mine every week - seems to do the trick. Once in a blue moon though, I do add a slug of injector cleaner to a full tank, but I'm not convinced that it makes much difference really.

As usual, I read these posts and it sows the seed of "perhaps I should do that" - but a combination of laziness and "if it ain't broke-ism" usually saves my bikes from unnecessary intrusion. Trouble is, I've got an ultrasonic bath and I love any excuse to play with the toys...so it is probably only a matter of time before I succumb!

"Professionally cleaned" - hmmm define professional? 

I shall watch for replies with interest...and maybe just go and order a few o-rings etc. , just in case....


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                              Paul  

"Heidi" K100LT 1991 (Grey) (VIN 0190172 Engine No. 104EB 2590 2213) - 5th owner. January 2014 (34,000 - 61,000 miles and counting....)
"Gretel" K100LT 1989 (Silver Grey) (VIN 0177324 Engine No. 104EA 2789 2211) - 4th+ owner. September 2015 (58,500miles and counting....). Cat C Insurance write-off rebuild Feb 17
"Donner" K100LT 1990 (Red)  (VIN 0178091 Engine No. 4489 2024) - 6th & final owner (crash write-off now donor bike).   June 2012 (73,000 miles) to November 2013 (89,500 miles)
    

BobT

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If the engine is running fine then don't bother with injector cleaner. If you think that it might make a difference then it probably won't.
As for the lead thing, that is a scare story that has been going around for quite a while now. Just use the normal unleaded fuel and check your valve clearances every 15,000 miles or so. I'll bet that you will not see much change in those clearances. If they start reducing after 150,000 miles then you know that your valve seats are wearing, but you will still have another 150,000 miles before you need to take the head off and have hardened valve seats fitted at a local machine shop. Should you still have the bike at that stage then the few hundred quid that you spend on valve seats will be much cheaper than the thousands that you would have spent on lead substitute - which might not be doing anything anyway.
If you just want to spend money for the sake of it then buy a new helmet.

    

indian036

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Opinions vary, so take your pick!

In Oz, 95 and 98 fuel are to some extent self cleaning. If the injectors are seriously gunked up, professional off-bike is the way to go, as any additive won't do it nearly as well, if at all. For a machine doing some sitting unused time, some recommend a fuel additive that claims to stop the fuel going off. Opinions vary quite strongly whether these are any good. I've never used one, even in the boat which is often not used over the colder times. 

If you do use an additive, my preference is to use it at a higher concentration than recommended. Add the concentrate when your fuel warning comes on, or you suspect it is about to. (Your warning light works, right? Wink) run it on that for as long as you dare, or carry spare fuel for when it runs out. (This view picked up in a professional mechanic seminar on fuel injection.)

Best of luck. 

Bill


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1985 K100RT Red.  VIN 0028991K100RT    ENG 104EA248523386
1985 K100RT Blue. VIN 0029036K100RT    ENG 104EA25852071
1990 K100LT Black. VIN WB105060310190452
1984 K100RT White. VIN. 0023022K100RT  ENG 104EA32848523
    

blaKey

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I'm an additive guy. It probably has a placebo effect...the bike "seems" to run better but it's subjective.

I run the injector cleaner through the fuel tank probably twice a year.

It's good for the economy.

It keeps people employed.

I like the colourful charts and graphs that always accompany the advertising.

No, I do not want to buy a bridge...



Last edited by blaKey on Tue Nov 01, 2016 8:59 pm; edited 1 time in total (Reason for editing : not sayin')


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Neil
K100RS 1986 RED!
K100RT 1987 (now nekkid with red bits)

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ainsjac

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At the moment the economy has dropped off dramatically....now about 10 litres to 130km. I changed the plugs yesterday, tested the bike...all OK. Went for a longer ride on a country road this morning and I ended up with a K75. Yep, one plug lead had rattled itself off, side of the road repair.
One area eliminated from concern, now the fuel. I will probably try the cheapest road first...the cleaner and then if that does not work take the injectors out. Yes Paul, O rings will be on the shopping list. Like you, if it aint broke, no need to go further.


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AINSJAC
1983 K100 basic vin 0003960 colour red
1987 K100RT vin 0094685 colour, orange peel, sorry, pearl
    

audibob

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When I got my current K 100 I believed it was not as quick as my first K 100.. Although there was four years between ownership, I was convinced It needed my attention.

Not having had the benefit of  being on the forum at that time, and not wanting to get my hands dirty yet, Injector cleaner came to mind and was added, albeit on a full tank, and away I went. 

Placebo effect perhaps, but I was convinced over time,  the bike ran better.

I then began to notice the idle speed wandering so I began to suspect the performance might be affected by something else....really ????

First... read the forums for advice.

Second.... check everything that may affect performance.......

I cured a small air leak, balanced throttles, changed number 4 plug lead,  everything else was good.

I get 200 motorway miles before the reserve light comes on .

Idle speed  is smooth and steady at 1000 revs.

Part of me still believes the fuel additive gave me an improvement, but setting the bike up as it should be helped much more.....

The injectors are 27 years old, can they still perform as when new ? 

We all replace brake and fuel lines for that reason, why not the injectors, if only to remove a possible failure at some point.  Predictive maintenance ? 

 I will remove them and have them Professionally cleaned , I do not possess  a supersonic bath like Born Again Eccentric, and see if it makes any difference when I connect my balance tubes.

Bob


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K100 LT
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ainsjac

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I got a quote from a local firm to look at the injectors. They flow test them first and if they need refurbishment then it will be a total of $32 AUS each. It may be worth it, after all the bike has done just over 400,000kms....just run in!


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AINSJAC
1983 K100 basic vin 0003960 colour red
1987 K100RT vin 0094685 colour, orange peel, sorry, pearl
    

BobT

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@ainsjac wrote:I got a quote from a local firm to look at the injectors. They flow test them first and if they need refurbishment then it will be a total of $32 AUS each. It may be worth it, after all the bike has done just over 400,000kms....just run in!
How much fuel can you buy for $128? Petrol is a solvent so will dissolve most things. If you are expecting more than 0.5% improvement after the work then you will be disappointed. It may go a little better with the weight of your wallet $128 lighter though.
Don't disturb it if it is working!

    

92KK 84WW Olaf


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For what its worth when I got the 84 K100RT it felt very lively compared to my 92 K100LT and was also lighter on petrol and consistently 10-12+ miles per litre on motorway speeds.

Earlier this year I suffered a sudden increase in petrol consumption on the RT that it now seems about 8 miles per litre. Plugs NGK D8EA, air filter, all look good. I know the plugs should be D7EA but hard to get here and I don't think it makes much difference as the LT also had them in it. Since I now see injector repair kits and seals for very small money as in about €15 I figure it's worth going at them. I bought acetone to use but never did.

Or, should I take up drinking Guinness?


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1992 K100LT 0193214 101,000 miles
1984 K100RT 0022575 Baja Red bought 36,000 now 83,150miles
    

Born Again Eccentric

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@92KK 84WW Olaf wrote:I know the plugs should be D7EA but hard to get here and I don't think it makes much difference as the LT also had them in it.
Or, should I take up drinking Guinness?
Olaf, if you want me to get some D7EAs and bring them with me when I come over for the Christmas brunch, just let me know.

Drinking Guinness is always a good option though. It's good for you - apparently.


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                              Paul  

"Heidi" K100LT 1991 (Grey) (VIN 0190172 Engine No. 104EB 2590 2213) - 5th owner. January 2014 (34,000 - 61,000 miles and counting....)
"Gretel" K100LT 1989 (Silver Grey) (VIN 0177324 Engine No. 104EA 2789 2211) - 4th+ owner. September 2015 (58,500miles and counting....). Cat C Insurance write-off rebuild Feb 17
"Donner" K100LT 1990 (Red)  (VIN 0178091 Engine No. 4489 2024) - 6th & final owner (crash write-off now donor bike).   June 2012 (73,000 miles) to November 2013 (89,500 miles)
    

92KK 84WW Olaf


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S'pose you'll be bringing puddings back too.....

My Guinness consumption is rising. I use it when I am cooking, sometimes if goes in the food.....or stew or puddings.

I need to get making some soon, there's a very nice and hospitable gentleman down in France awaiting a delivery.


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1992 K100LT 0193214 101,000 miles
1984 K100RT 0022575 Baja Red bought 36,000 now 83,150miles
    

Born Again Eccentric

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@92KK 84WW Olaf wrote:S'pose you'll be bringing puddings back too.....

My Guinness consumption is rising. I use it when I am cooking, sometimes if goes in the food.....or stew or puddings.
Well, only if there is a surplus...after all I am an international pudding courier!

My Guinness consumption is rising too. I use it when I am cooking, sometimes it goes in the food....but mostly it goes straight into me!


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                              Paul  

"Heidi" K100LT 1991 (Grey) (VIN 0190172 Engine No. 104EB 2590 2213) - 5th owner. January 2014 (34,000 - 61,000 miles and counting....)
"Gretel" K100LT 1989 (Silver Grey) (VIN 0177324 Engine No. 104EA 2789 2211) - 4th+ owner. September 2015 (58,500miles and counting....). Cat C Insurance write-off rebuild Feb 17
"Donner" K100LT 1990 (Red)  (VIN 0178091 Engine No. 4489 2024) - 6th & final owner (crash write-off now donor bike).   June 2012 (73,000 miles) to November 2013 (89,500 miles)
    

Ringfad

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How about cleaning the injectors with Guinness , we can test this on Paul's bike when he is over in Ireland after Xmas.

In all seriousness I have now fitted replacement injector kits to 5 K's.

To me it was well worth doing this as at least I know all the injector parts are now good and any issues are not injector related.

I struggled with one k100 16V with what I thought was a bad injector but turned out to be a broken wire in the injector loom.

There are plenty of videos's on YouTube showing how to do this but it is not difficult.


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   ;BMW; K100RS Style Black 1987 99K Km     ;BMW; K1 Black 1993 42K Km     ;BMW; K1100RS Red 1993 50k miles
    

ainsjac

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I will have to suggest these alternate lubricants for cleaning injectors to the blokes here. I do know they use different lubricants on Friday afternoons... no doubt to clear their own injectors.


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AINSJAC
1983 K100 basic vin 0003960 colour red
1987 K100RT vin 0094685 colour, orange peel, sorry, pearl
    

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