[Clogan]

Are you really done with your gt?

Well...probably. Guess we will see what I actually do once spring gets here. Meanwhile, I'll let the bike sit until it warms enough to fiddle with it. I've always got my trusty KLR when I want to ride...IF I want to ride.

 

[Trebor27]

G'day Mr Clogan,
but I'm not sure if FI pumps work on higher pressures so I can't say how to test the pump flow in your garage - that may be a workshop job .

KTM appears to have A special fuel restricter so they insert a pressure guage and special restrict or nozzle to the fuel lines from teh tank and activate the pump. They look for a certain pressure. (This is liek load testing a battery, they load the fuel pump and expect a certain minimum fuel pressure.)

I don’t know the nozzle size of the restrict or, so unless someone who knows more than me can chime in you are left with stripping down the fuel pump to check for blockages/dirty filters. (i.e. Throwing parts at it.)

For my zx-10R there they specify two values.
1. Max pressure with output blocked.
2. Max volume over time restricted.

KTM’s approach effectively combines these into 1 test.

Rob

 

[Clogan]

Remember, battery's usually do not last more than 3 years. If your battery is OK then, Sounds like the fuel pump/ fuel pump filters in the fuel pump. Fuel pump assembly is easy to replace. You do not even have to remove the tank. Just empty the tank and get new O rings. I went with the Rottweiler assembly (HFP - KTM 990 - 1290 - Fuel Pump with Installation Kit ). Best,

Doc

Doc:
Do you happen to know if the O-ring and filter are available separately, or only as a part of the kit?

Oh, and by the way, are there two filters, or only one? I only see one in my shop manual, and it appears to be imbedded inside the fuel pump assembly. If that's the only one, and if the filter and O-ring cannot be purchased separately, the easier thing to do is replace the entire pump assembly with the one in the kit.

EDIT: Never mind; I just now noted the separate "Fuel Pump installation kit", for $79.98, that includes O-rings and filter, but no pump iself. I think I'll spring for the $129.98 kit that includes the pump, just in case my pump is bad too. Plus, I won't have to dismantle the pump assy to get to the old filter.

I wasn't gonna worry about it until Spring, but it was 68 degrees here yesterday!! (Supposed to snow tonight, tho').

Thanks!
Chet

 

[85481]

Doc:
Do you happen to know if the O-ring and filter are available separately, or only as a part of the kit?

Yes, Please check the Rottweiler site links: HFP - KTM 990 - 1290 - Fuel Pump Installation Kit . You do not have to replace the fuel pump if you do not want.

Oh, and by the way, are there two filters, or only one? I only see one in my shop manual, and it appears to be imbedded inside the fuel pump assembly. If that's the only one, and if the filter and O-ring cannot be purchased separately, the easier thing to do is replace the entire pump assembly with the one in the kit.

The two filters come with the repalcement kit. You can by the entire fuel pump assemble but, it is more expensive ($348 USA): 2018 KTM 1290 SUPER DUKE GT BLACK Fuel Pump | KTM World

EDIT: Never mind; I just now noted the separate "Fuel Pump installation kit", for $79.98, that includes O-rings and filter, but no pump iself. I think I'll spring for the $129.98 kit that includes the pump, just in case my pump is bad too. Plus, I won't have to dismantle the pump assy to get to the old filter.

Yes, that is what I did. Did not know if I had a bad fuel pump.

I wasn't gonna worry about it until Spring, but it was 68 degrees here yesterday!! (Supposed to snow tonight, tho').

Thanks!
Chet

Best,

Doc

 

[Hammerhead]

Clogged fuel filter sounds very likely. In the manual, there's a warning against getting any dirt in the fuel system. Regardless of how careful you are, crap from service station tanks can still clog the filter(s). A friend with less than 3000 miles on a new ZX-14R was stranded on a trip. Someone suggested he remove the tank and pull the fuel pump and when he did, it was clogged with sand. Cleaned up and fresh fuel and he was on his way.

 

[Clogan]

Clogged fuel filter sounds very likely. In the manual, there's a warning against getting any dirt in the fuel system. Regardless of how careful you are, crap from service station tanks can still clog the filter(s). A friend with less than 3000 miles on a new ZX-14R was stranded on a trip. Someone suggested he remove the tank and pull the fuel pump and when he did, it was clogged with sand. Cleaned up and fresh fuel and he was on his way.

Hoping you are right! I drained tank last night (it was full). Now waiting on parts, with fingers crossed.

 

[Clogan]

Well, I got an email from Rottweiler that my new fuel pump kit had shipped. It was a tolerable 44° degrees in my shop today, so I removed my old FP. To the untrained eye, all looks OK. Strainer shows no sign of gumming or any sort of clogs. I have not yet disassembled it to reach the actual filter, so that may be where the clog is. Or, it might not be the FP/filter at all. The no-start might be something else altogether. We shall see.

To be continued...

 

[Clogan]

Too cold to work in the shop this morning, so I moved in to the kitchen counter. The Rott kit had everthing I needed, and the work to change out the strainer, filter, pump, and O-rings was pretty straight forward. The old strainer looked pristine, but I replaced it anyhow. The old filter was very black in color, but showed no obvious signs of clogs. (Pics below). Consequently, it's pretty much a toss up now as to whether my R&R will cure my no-start problem, unless, of course, the problem was the pump itself. Guess I'll find out when it warms up a bit, and I reinstall the pump assy in the tank and try it out.

To be continued...

 

[Hammerhead]

Something in the fuel caused that blackening of the filter. If it was clogged, the pump may have overworked itself and become unable to make pressure. Can't remember, did you ever check the ignition? Plugs have fire?

 

[Clogan]

I did not yet check ignition. (Maybe I should have)... that's next if FP didn't fix it.

 

[DaveAu]

Amazing how we have wires and solder joints exposed to fuel (or fumes at low fuel level) and we don't blow up while riding .........

 

[Clogan]

Well, rats!

New FP, (with new filter and new strainer) is in, but bike still won't start. The engine coughed once, like it was gonna start, but it didn't. At least I now have a FP with a lifetime guarantee. Too cold to mess with it any further today. Guess I need to look for spark next. Hard to figure tho...it ran perfectly the last time I rode it: like a bat outta Hades, as always. I got home, parked it in shop like always. Then next time I go ride: no start.

What can go wrong while a bike just sits parked, inside the shop???

Got me scratching my head, for sure.

 

[DaveAu]

Dammmmm, the #1 suspect may have been innocent ........ unless the injectors are also blocked up with that black crud?

Looks like you will have to dig deeper....... spray pattern, spark, valve clearances, ......... I don't know much about it but another member ("@Troppo") had starting issues with his 2yo gen 2 GT........ it began to need 3 goes to fire up and gave strange warnings on his dash (like tyre psi too low when it wasn't)...... apparently caused by voltage fluctuations from the starter motor (KTM Aus replaced under warranty).... his bike is now running fine........ I know, weird, but maybe some electrical component is sending a false signal to the brain? A relay, a connector, a wire..??

Check both your fuel taps are on full........ don't laugh, it has been done before, but I doubt you have been riding around using fuel from only half your tank.......... ......... would save a lot of hassle if it was that simple

 

[Rageyoudown]

Wait... @DaveAu are you saying the 16 SDGT has fuel taps?? Please laugh if you're joking, I don't blame you..

 

[DaveAu]

Oh yes it does, and there are two,,,,,, no BS, my KTM tech told me 3 yrs ago that if one is forgotten and left 'off' it stops the balance flow, so the pump sucks the left side dry while the right side (the fuel sender side) shows a fuel level, and yet the bike stops dead.........

I'm not gonna laugh as it is so easy to do after pulling the tank off......... but I'm not sure about the SDR, it may not have a balance pipe like the SDGT has.........



PS I doubt this applies to Clogan's issue but.........

 

[DG Rig]

Too cold to work in the shop this morning, so I moved in to the kitchen counter. The Rott kit had everthing I needed, and the work to change out the strainer, filter, pump, and O-rings was pretty straight forward. The old strainer looked pristine, but I replaced it anyhow. The old filter was very black in color, but showed no obvious signs of clogs. (Pics below). Consequently, it's pretty much a toss up now as to whether my R&R will cure my no-start problem, unless, of course, the problem was the pump itself. Guess I'll find out when it warms up a bit, and I reinstall the pump assy in the tank and try it out.

To be continued... View attachment 100502 View attachment 100503

Oh balls! I would have bet $ it was the fuel pump... That filter in the last picture is suppose to be white, right?

 

[Hammerhead]

After an early-ownership check in which I pulled the tank. I forgot to turn both taps back on. It started and ran for a few seconds then died and would not restart. Fortunately, my brain began to function as designed and I remembered to turn the taps on.

 

[Clogan]

I verified the function of the taps a while back when I removed the tank for an air filter swap: I forgot to turn them off, and fuel spilled out on the floor LOL.

Also verified that clockwise is closed (off); (righty-tighty).

Now I'm trying to figure how to get the bike up my ramps into my trailer, if I wind up taking it to a dealer. Guess I could try to push it myself, but I'm an old geezer, and not as strong as I used to be. I fear I'll drop it. Neighbors are worse off than me. Might try to use a winch, but where to connect it?

I'll figure something out.

 

[85481]

Well that’s not good news... Check and make sure your battery is OK?? Sounds like next step is checking out your coils & spark plugs?? Or, KTM Dealer Time????

Best,

Doc

 

[Clogan]

Crankshaft position sensor gone bad?
I dunno...what in the heck breaks while the bike sits, parked? With no symptoms at all beforehand??

Weird!