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1Back to top Go down    Cleaning Fuel Injectors on Thu 29 Dec - 18:35

Albyalbatross1

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Its been a busy arvo here in the "HesmadLab".

On our Tuesday ride I was handed some injectors for Blakey by K-Freak. "they wont fire, but you might be able to" so i took up the challenge. I read up on how the injectors work and set about trying to free em up.

I first Numbered the injectors and checked the coils and they all measured in at 16 ohms. Good.

Next i hooked up my trusty power supply and tried to fire em. Nothing, Notta, zilch>>>>>
So I fired up my super youbeat ultrasonic cleaner and gave them a short bath.

After the first short bath i tested each injector and one actuated. set this one aside and put the rest back in the bath and continued with testing and ultrasonics untill they all actuated.

Now a brief trip to youtube to see how people were cleaning the gunk out from the insides. Here is what I found. Use a can of carby cleaner, short lenght of fuel hose and 30ml syringe.


I set up the first injector and pressurised the cleaner and powered up..

Not the best. So gave it a few more after lewtting it stand with cleaner in the injector and ...

Out came a splutter then whoosh!!!
Nice round pattern on bench top..


So now all they need is some new filters/caps/o-rings ect as they are all working nicely on the bench. I am more and more impressed with ultrasonics as a mediem for cleaning small tight places. (thanks OG!!) So if you are coming up on the 7th bring those pieces to clean as I have a fresh bath of cleaner.

    

2Back to top Go down    Re: Cleaning Fuel Injectors on Thu 29 Dec - 19:02

K-BIKE


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I suspect if you wired them up to the previously discussed energiser circuit and had them firing whilst submerged in the ultrasonic bath it would be even more effective at removing the gunk from inside.
Regards,
K-BIKE

    

3Back to top Go down    Re: Cleaning Fuel Injectors on Thu 29 Dec - 22:20

charlie99

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nice work there alby .....thumbs up


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'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
    

4Back to top Go down    Re: Cleaning Fuel Injectors on Thu 29 Dec - 22:49

blaKey

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Wow, thanks for that!
I'll pay for the can of carby cleaner!


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

Remember Rule No. 6
    

5Back to top Go down    Re: Cleaning Fuel Injectors on Fri 30 Dec - 4:27

club_c

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Oh man. I have 8 of those sealed up injectors laying here right now. Wish I had access to an ultrasonic cleaner...


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1988 K100RS SE VIN 01477554
    

6Back to top Go down    Re: Cleaning Fuel Injectors on Fri 30 Dec - 5:27

ungaas

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Alby,
What liquid was used in the sonic cleaner

    

7Back to top Go down    Re: Cleaning Fuel Injectors on Fri 30 Dec - 6:14

Albyalbatross1

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Ungass Brulin 815 GD is a standard immersion and ultrasonic detergent cleaner. I used it in its weakest solution. My cleaner has a peak of 500 watts.
K-Bbike i had a look for the timer you mentioned (I remember reading it) but cannot find it. I agree it would be more efficent to have a timer and being able to adjust the duty cycle would give an accurate reading of coils performance if flow rates were measured. Best go pinch the neighbors rain-gauge!

blakey..Its on me, just be here on the 7th!!

    

8Back to top Go down    Re: Cleaning Fuel Injectors on Fri 30 Dec - 8:24

K-BIKE


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The article was about using a 12 volt rectified AC to give a wave form that would fire the injectors open and shut so as to work them. Seeing your article it occurs to me that having them cycling whilst in the ultrasonic bath would help the sonic waves penetrate from both ends.
Regards,
K-BIKE

    

9Back to top Go down    Re: Cleaning Fuel Injectors on Fri 30 Dec - 13:47

Albyalbatross1

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K-Bike yes . It would help to have the injector open to allow the cavitation process to lift the rubbish from the valve seats. The great thing about ultrasonics is the sound will resonate through the item in the bath. so anywhere there is liquid the cavitation (cleaning process) will occur.

    

10Back to top Go down    Re: Cleaning Fuel Injectors on Fri 30 Dec - 13:53

charlie99

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some of the battery chargers are half wave rectified .....good shaking ability of batteries ...and a good operation of injectors i suspect equivalent to 3k ?


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cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
    

11Back to top Go down    Re: Cleaning Fuel Injectors on Fri 30 Dec - 15:27

ungaas

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Cheers for that, some good info.

    

12Back to top Go down    Re: Cleaning Fuel Injectors on Fri 30 Dec - 20:32

BIG D

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Cool

Thats a good write up Alby thanks for sharing that.

BIG D

    

13Back to top Go down    Re: Cleaning Fuel Injectors on Fri 30 Dec - 20:50

blaKey

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Found this on Oz Fleabay.

I believe this kit will be what I'm after to bring them back to near original...and have a spare set.

Also, on YouTube, there are videos on how to change the filter.



Last edited by blakey on Fri 30 Dec - 20:53; edited 2 times in total (Reason for editing : not tellin')


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

Remember Rule No. 6
    

14Back to top Go down    Re: Cleaning Fuel Injectors on Fri 30 Dec - 21:15

charlie99

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good link blakey, he has all sorts of good things ..


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cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
    

15Back to top Go down    Re: Cleaning Fuel Injectors on Fri 30 Dec - 23:22

Albyalbatross1

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That looks simple enough. Ill go you halves in the kit Blakey. I got four spares i want to clean up.

    

16Back to top Go down    Re: Cleaning Fuel Injectors on Fri 30 Dec - 23:34

blaKey

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Nah, my shout for cleaning the injectors.


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

Remember Rule No. 6
    

17Back to top Go down    Re: Cleaning Fuel Injectors on Mon 27 Feb - 4:36

robmack

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Bought four K1100 injectors with higher flow to replace the standard ones on my K100. So, I got into cleaning them based on the instructions above. Below, I document the differences:

First, I couldn't get ahold of a syringe that tightly fit the fuel hosing I had lying around so I used a vacuum plug instead.




I cut the hose and press fit a rubber vacuum plug in the end after piercing a hole in the end of the plug with a jeweler's screwdriver so that a spray nozzle was a tight fit. As you can see, the setup works well for spraying carb cleaner through the injectors.


I built a very simple wire to actuate the injector. Lamp cord with one line cut and spliced in a push button switch. I found a Bosch injector connector pigtail by raiding a car at the local junk yard and cutting a connector off its wiring harness. Soldered and shrunk wrapped the connections.


Aso found this simple circuit online which exercises the injectors like professional test instruments. It could be built for $20-$30 in parts. It's overkill for this application however but may be interesting for others here.

Bought an 8 cylinder rebuild kit from Mr. Injector to recondition the replaceable injector parts (therefore I have parts for the K1100 injectors as well as the original K100 injectors). I'll give the injectors an ultrasonic bath in Simple Green solution, replace the parts and spray paint the bodies with heat resistant paint. They'll look and work good as new; and it only cost me $40 for everything including the injectors. Not bad.


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1987 K75 @k75retro.blogspot.ca
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18Back to top Go down    Re: Cleaning Fuel Injectors on Mon 27 Feb - 7:14

charlie99

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nice !!!


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cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
    

19Back to top Go down    Injector cleaning service on Sat 7 Apr - 0:11

Rjtrucker


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I just purchased a fuel injector flow bench and test machine. I am now offering as a service cleaning and testing fuel injectors. I also have in stock new O rings and filters for the BMW injectors. Some people on here have cleaned their own injectors but with out the flow bench you can not be sure if they are working correctly. Also with the ethanol in the fuel some of the old O rings are getting beat up. The new O rings can handle the new fuel additives. Also there is a screen in the top of the injector which over the years gets clogged and can estrict fuel flow thru the injector. If anyone wants more info about my service or just needs replacement O rings and screens let me know.


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Ron S
NJ USA
74 R90/6 cafe project
93 K11LT
85 K100RS
85 K100RS turbo project.
And a load of K100 projects and parts.
    

20Back to top Go down    Re: Cleaning Fuel Injectors on Thu 17 Jan - 23:42

Erman

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Is there a website from where to buy these refurbishment parts?


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21Back to top Go down    Re: Cleaning Fuel Injectors on Fri 18 Jan - 0:38

Rjtrucker


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There are a few guys on ebay selling the parts. I also have parts avaliable for the do it yourselfer. The only way to be sure the injector is working corectly is on a flow bench. You can get them to have a good looking spray pattern but you cant be sure they are all flowing the same amount of fuel. Also it would be hard to leak test them. I run full operating pressure thru the injector for 30 seconds and see if there is any dripping. The cost to have 4 injectors cleaned is $60. That is $15 per injector. If you want more info feel free to contact me.


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Ron S
NJ USA
74 R90/6 cafe project
93 K11LT
85 K100RS
85 K100RS turbo project.
And a load of K100 projects and parts.
    

22Back to top Go down    Nice! on Wed 23 Jan - 4:54

joao.c130

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Very nice example!!

    

23Back to top Go down    Re: Cleaning Fuel Injectors on Wed 23 Jan - 8:15

92KK 84WW Olaf

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RJTrucker

This sounds an excellent service.

I am thinking could you set up an exchange service that we could use from abroad. The cost of the work is reasonable, even for us the cost of postage is not high as the injectors are light enough.

The way these would work is we order injectors, pay for them including a deposit which would be refunded when you are in receipt of the old injectors....That way no one is off road for long.

We have same over here for exchange fork stanchions etc.


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1992 K100LT 0193214 101,000 miles
1984 K100RT 0022575 Baja Red bought 36,000 now 87,100 miles
1997 K1100LT 58,000 miles
    

24Back to top Go down    Re: Cleaning Fuel Injectors on Thu 24 Jan - 1:09

Rjtrucker


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I would be willing to do it on an exchange basis. I do whave a few sets of injectors here that I can make ready. The only other issue would be if I am sent an injector that has a bad coil in it of if I am sent an injector that can not be restored. Then I would have to charge for the replacement injector from the deposit.


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Ron S
NJ USA
74 R90/6 cafe project
93 K11LT
85 K100RS
85 K100RS turbo project.
And a load of K100 projects and parts.
    

25Back to top Go down    Re: Cleaning Fuel Injectors on Fri 25 Jan - 3:38

Adiwan Djohanli

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Hello Gents,

This topic and discussion hve been very useful. I thank you for this.

I often hear that injector must be calibrated, is this correct? This is to measure the amount of fuel comes out in a given time.

The expert comment / view is much appreciated.

Best regards.


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Adiwan Djohanli
Jakarta-Indonesia[i]
    

26Back to top Go down    Re: Cleaning Fuel Injectors on Fri 25 Jan - 3:52

Rjtrucker


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There are no adjustments on an injector. They are sealed. On my flow bench I can measure the amount of fuel released over a selected time and fuel preasure. When I have a set I run them and make sure they all are within 1% of each other. The main thing is getting them clean inside the chamber and the pintle valve. Dirt in the valve can cause leakage and an irregular spray pattern. Dried fuel can coat the inside of the chamber and restrict fuel flow. Also the screen can get clogged just like a fuel filter. The yellow pintle caps only function is to protect the pintle valve. If you look closely you can see a small pin sticking oit of the injector. Do not touch that. If damaged the injector will not function corectly. Also the new o rings are made to be able to take the new fuel additives. I hope this helped. If you have any other questions I will try to answer them.


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Ron S
NJ USA
74 R90/6 cafe project
93 K11LT
85 K100RS
85 K100RS turbo project.
And a load of K100 projects and parts.
    

27Back to top Go down    Re: Cleaning Fuel Injectors on Fri 25 Jan - 3:58

Adiwan Djohanli

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Hi Rjtrucker,

Thanks for the explanation. I understand that the meaning of calibration is actually cleaning the injector and check the amount of fuel comes out of it.

Cheers Smile Smile Smile


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Adiwan Djohanli
Jakarta-Indonesia[i]
    

28Back to top Go down    Re: Cleaning Fuel Injectors on Thu 7 Apr - 4:39

MikeisonTV

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http://youtu.be/rUUgR94drxg

Just did this! Tire Valve stem Worked great and if you use the right drill bit there is no need to melt the 2 together. And drill the cap with it screwed on, then your hole will be dead center 👊🏿

I also found a dead injector which will like diagnose why I was in there cleaning them in the 1st place.

Genius Kurus (k bike gurus) will any k injector replacement work 85-91?
Now having 3 functional, freshly clean ones...it seems excessive to buy a new set from eBay.

Any if anyone local has one I'd love to get the old girl screaming again.


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29Back to top Go down    Re: Cleaning Fuel Injectors on Thu 7 Apr - 5:08

Chocolate

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MikeisonTV wrote:Genius Kurus (k bike gurus) will any k injector replacement work 85-91?
YES, up to 1996

Now having 3 functional, freshly clean ones...it seems excessive to buy a new set from eBay.
You could buy this injector set, they are perfect for the K.
put them for two hours in brake cleaner and sell the unneeded or clean as shown above.
Now you will have the modern four hole injectors :-)
Bosch Fuel Injector Set of 6 for BMW 2.5L 3.0L Part # 0280150415 / 0 280 150 415
It has to be the Bosch number
/ 0 280 150 415

Cheers


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Only a few activities make me experience my senses in a way motorcycle riding does, it is like swimming in the nude in a river.
K75 BA/1992 ABS, K75 BA/1991 noABS, Ducati, Mobylette M1/1973
Pictures:Me my bike and I
    

30Back to top Go down    Re: Cleaning Fuel Injectors on Sat 9 Apr - 7:36

Holister

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While the #415 will work and you probably won't notice any difference in performance, by my calculation they will deliver slightly less fuel so your induction will run a little lean. Slight over heating may occur. Check SPs for colour. Changing to a cooler plug (D8EA) may help.

Read THIS


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1988 K100RT VIN No. 0094680
1989 K100RT VIN No. 0097367 (naked)
1996 K1100RS VIN No. 0451808
Fuel: 95 Octane
Engine Oil:Nulon Full Synthetic 15W50
Gear Box Oil: Nulon Synthetic 75W90
    

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