K100 4V no start. Bike 2

[Martin]

Mates blue K100 which he says always starts has probably gone out in sympathy with the black RT 75. It was cranking with a little cough but would not run. An AH HAAA moment checked the 4 pin connector to the fuel pump, on looking it had already had the female pin pushed in a bit. he checked the supply to the pump which was OK. He then checked the pump with an ohmeter , apparently that checked OK. I suggested running an alternate power supply direct, on doing so there is a little click as pump moves ever so slightly, so tried reversing the pump am got the same result. We have a pump that is suspect, in that last time we tried it on the black RT 75 it blew a fuse. Next week I think we should pull both pumps ( Blue bike & red bike) and have a good look at them, failing that I have seen an in tank Ford Falcon pump the he has, that might fit with modifications. The one good thing is that even though he is in a lot of pain, his spirits seem to pickup while we are sorting out these problems. He started discussing the problems with his gold K75s :yow, but as this is fairing work and I know nothing about fibreglass he will have to sort it out when he recovers, big sigh.
Regards Martin

[The Mighty Gryphon]

I guess the good news is that your mate's not a penguin and he didn't blow a seal, just a fuse.

[Martin]

Very glad, but the RT was suffering from leaking seals, which I used Jonny's homemade Seal Mate on. But although I think that problem may be fixed, won't really know until it goes for a decent ride, still chasing other problems. I think a lot of the trouble stems from the fact that although they are sort of covered, they are still subject to the weather. I would like to get a good run at the problems, but due to his back problems we can only do it in short bursts. He has another appointment in 10 days to see what they have decided to do.
Regards Martin.

[Martin]

Went round for another session in Brickland. Black RT 75 had a flat battery so we decided to have a look at the blue K100. I decided the only thing was to pull the pump :yow. Serious meltdown of the fuel pump damper, suspect PO has been using ethanol fuel for a very long time. I know my mate doesn't run ethanol fuel. After pulling the pump we tried to find something to clean it and me, ended up using methylated spirits followed by acetone. Cleaned up really well, using a long screwdriver I managed to pickup most of the black gunge in the tank by poking it until it stuck, and then withdrawing carefully so as not to drop it. Soaked the now clean externally pump in methylated spirits, as we did not have enough acetone left. Applied power to the pump it buzzes but does not spin. As he had an old rusted pump, we decided to cut it part to see if we could operate on the now clean pump, as a last resort it may be possible but not really desirable. As it now stands I have the pump and I am seeing if I can unfreeze it by putting it in a ultrasonic jewellery cleaner. I don't hold much hope but it is worth ago. In one of the pictures you can see part of the fuel filter which is plastic we will definitely be replacing it, mate wants to put a metal one externally. I really hope Oz does not go down the track of putting ethanol in all fuel grades.
Regards Martin.

[Vespa no more]

A mechanically minded mate soaked a dead BMW K100 85 fuel pump in vinegar for some time and revived the item. Can find out more if needed.
Coincidentally, my bike is not starting. Probably electrical. I am taking a break from the garage and the B

Will need to find replacement fuel pump for K1100RT 1994. Are they all the same and thus the replacements? Will go to the wreckers or similar for stand-in.

Re Ultrasonic cleaners: we had one at school which I used on my injectors. School handyman said "just use water". Waste of time. Injector shop (using very similar machine) used "Ultrasonic cleaner fluid" - basically a degreaser / detergent. Major difference in results.

Hence the saying: The right tool used right does the job right

GF

[Martin]

Bought my ultrasonic cleaner from Aldi for $20.00 on special for the wife then used it to clean my injectors. :nono I then had to buy another one. I use injector cleaner in it when doing the injectors. And LPS 1 contact cleaner for switches etc works a treat. As far as a new pump, you can get one that requires modifying due to smaller diameter from $40.00 Au ( Kemso ) or a what looks like a copy from the Czech Republic for $99.00 Au plus Freight $25.00 Au. Or you can go up to $400- $500 and virtually anywhere in between check Ebay.. My mate is thinking about using a Ford one don't know what model. I have had slight movement occasionally, about 5 deg after 3 sessions in the cleaner 3min on high. I have it currently soaking in WD 40. You have at least only one bike not starting I've got three of my mates bikes that I'm helping to sort.
Regards Martin

[Vespa no more]

Was looking today on ebay at fuel pumps... Polish ones were showing $42.
There is Brakepads online in Vic selling Ford V8 fuel pumps for $53 but the external diameter is 38mm (not the required 52). Maybe  a bracket / modified Jubilee Clip around the outside with some pieces of fuel hose between the pump and the bracket to pack it out. He sells submersible fuel hose ... $25 metre
Then there's the wreckers yard ... always fun to dismantle without a care

Sounds like the pump wants to go but is blocked with shite - hopefully it will dilute and clear. When I talk to my friend with ask about the vinegar. From what I remember, soaked several times over a weekend or a week. He's a very competent bike rider / owner / fixer.

You will get a result ... just time and money

[Martin]

Vespa I have used vinegar before and also Coca Cola. Coke works well on sintered bronze filters. Pump is currently in the garage soaking in vinegar. Time will tell.
Regards Martin

[Martin]

After a week of soaking and ultrasonic treatments the pump still won't free up. Gave the mate a heap of alternate pumps and prices from the net, he will get back to me. His son is a auto electrician and is looking into alternate pumps. While I was over there he got me to remove the pump on the gold K75s. Lucky he did the damper is starting to disintegrate and the tank is full of some sort of tank sealer (PO ) looks like a gold yellow varnish that is now flaking off.  There is also a thick lump of it in one corner of the tank where it has pooled in order to fix a leak. Unless I can find something to remove the varnish, he is just going to remove as much of the flaking stuff as we can and then run it. If any body knows what it is it would be helpful Also removed about 2 cups of water from the tank. While we were on pumps we removed the pump from the red RT 75 which he bought as a non runner no battery, frozen callipers and in need of a good clean. He had previously used the tank and pump on the gold bike. On removal the filter and pump were covered in rust, never seen a filter that rusty. The pump is a smaller diameter non original held into the cut down damper by two hose clips. He has an interesting solution for the disintegrated pre filter. He is going to manufacture them out of a product called Termimesh, a barrier for the prevention of termite intrusion. It is a very fine stainless mesh which he is going to join at the seams by tinning with a soldering iron. He has also located 2 Ford pumps same diameter as the OEM in his collection.They are not going and require special security bits to take apart, I stopped off at Jaycar and found a whole set that will do the job for $14.95 Au. I will take pictures next week hopefully he will have found a pump and a battery.
Regards Martin.