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Occasional starter, no firing |
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legend88 
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Joined: 18 Aug 2013 Location: Newcastle Status: Offline Points: 6699 |
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 Posted: 30 Jul 2023 at 19:41 |
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Yep, completely random for me too. It would cut out when changing gear and once even when banked over at about 70mph with a sheer drop on the outside! I guess the contact springs inside the switch make a connection but then can lose it when affected by vibration or jolts. |
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tfcoulson
Moto2 racer 
Joined: 23 Oct 2016 Location: Ireland Status: Offline Points: 165 |
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Posted: 01 Aug 2023 at 08:03 |
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yep i was thinking it was possibly cutting out sometimes when the revs got high, but then other times it didn't so was completely random. I opened it up further this time and gave the contacts a clean, they were a but corroded. Extended the springs a little too. Put it back together and now the fuel pump doesn't go  . The ignition key is connected in some way I'm guessing since it should prime on key on? I just unplugged the pump connector under the seat a couple times and it came on again. Tried this morning and it's not priming. |
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legend88
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Joined: 18 Aug 2013 Location: Newcastle Status: Offline Points: 6699 |
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Posted: 01 Aug 2023 at 08:40 |
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The pump sounds like a different issue, electrics can be frustrating! You did mark and refit the base of the ignition switch correctly? If not, the contacts might not be in the correct orientation although I can't remember off the top of my head what that would do. |
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tfcoulson
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Joined: 23 Oct 2016 Location: Ireland Status: Offline Points: 165 |
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Posted: 01 Aug 2023 at 10:58 |
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I'll test the pump relay when I get home. I'm pretty sure it's back where it should have been, looks the same as the other pictures in the other thread at least! It did work at least once when it was put back together so it must have made a contact at least once.
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Stevex
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Joined: 05 Jul 2016 Location: UK Status: Offline Points: 1481 |
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Posted: 01 Aug 2023 at 14:58 |
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Disconnect the starter solenoid; when you then press the start button the fuel pump will run for as long as you keep the button depressed. If you can't hear the pump running at least this will allow you to do a volt check at the pump connector as part of your fault diagnosis.
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People say I don't know Jack Sh1t; but I do, he lives next door.
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tfcoulson
Moto2 racer
Joined: 23 Oct 2016 Location: Ireland Status: Offline Points: 165 |
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Posted: 01 Aug 2023 at 19:43 |
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Swapped the relays and its the same so they are fine. Its very random though, worked a few times then stopped again, worked then stopped. Started draining the fuel (have the quick disconnect fuel lines) then thought I would try push the starter and I can feel it pumping and there is more pressure on the hose, but no noise on key on. Checked volts on the connector and getting 12 at the battery side and 10 at the tank side, looks a little corroded but can't get them out to clean. Just put solenoid cable back and it started without the pump noise and kept running, now the pump noise is back. Wonder of maybe the fuel line was squashed and it couldn't prime any further or something? |
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badapple
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Joined: 03 Nov 2014 Location: Norwich United Kingdom Status: Offline Points: 5776 |
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Posted: 01 Aug 2023 at 22:08 |
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Definitely check the lines and all things fuel related. The high pressure fuel line kinked on a gen2 causing all sorts of weird intermittent running issues. Sorry bit late to the thread I've had a read through and it certainly seems that there's been several issues which makes it so difficult to diagnose but all the previous advice is what I'd of checked. Not sure of the pump set up on the gen1 but any filters or breathers would be well worth checking.
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I started out with nothing and I've still got most of it left
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Stevex
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Joined: 05 Jul 2016 Location: UK Status: Offline Points: 1481 |
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Posted: 01 Aug 2023 at 22:27 |
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Just re read the whole thread; time for you to remove the fuel pump, replace the filter, clean the t-bag and check the pump wires going through the base plate. I replaced my filter after 14k miles and see the pic of what I found. Also see the pic of the sealant plug for the pump wires; I caught it in time and re sealed it. Use oetiker clamps when replacing the filter (as fitted), jubilee clips come loose from what I've read.
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People say I don't know Jack Sh1t; but I do, he lives next door.
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tfcoulson
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Joined: 23 Oct 2016 Location: Ireland Status: Offline Points: 165 |
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Posted: 03 Aug 2023 at 17:06 |
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well that wasnt it! Fuel pump cut out on me again, got it going eventually to get me home. Don't think it sounded like it was running too great though and a bit lumpy. Even the missus said it didn't sound great and sometimes I think she's half deaf. I did have the fuel pump out before and I don't remember it looking too bad. But I'll have it out again and see. I don't think I cleaned anything last time. Are the aftermarket ones any good?
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Stevex
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Joined: 05 Jul 2016 Location: UK Status: Offline Points: 1481 |
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Posted: 05 Aug 2023 at 15:19 |
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Aftermarket pump? Doubt therell be any that will fit. Ive never heard of a fuel pump failure on these bikes,but many problems from blocked or partially blocked filters. If you replace the filter get one from Griff, use new oetiker clamps. Some owners replace the hoses too, as they can fail.
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People say I don't know Jack Sh1t; but I do, he lives next door.
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legend88
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Joined: 18 Aug 2013 Location: Newcastle Status: Offline Points: 6699 |
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Posted: 05 Aug 2023 at 16:38 |
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legend88
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Joined: 18 Aug 2013 Location: Newcastle Status: Offline Points: 6699 |
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Posted: 05 Aug 2023 at 16:55 |
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Just a thought - Blocked tank breather? It sound like you might have more than one problem to be honest!
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tfcoulson
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Joined: 23 Oct 2016 Location: Ireland Status: Offline Points: 165 |
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Posted: 06 Aug 2023 at 07:44 |
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seen the videos and his kit so will probably go for it. I did have to drill out the water drain breather a couple weeks ago as that was blocked again, is that the one you mean or is it the one next to it? |
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legend88
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Joined: 18 Aug 2013 Location: Newcastle Status: Offline Points: 6699 |
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Posted: 06 Aug 2023 at 09:28 |
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The one next to it that seals against the rubber grommet on the underside of the filler cap.You obviously know the drain is for water or fuel that gathers in the filler neck. The other one is to vent the tank if it overpressures when it gets hot. But also prevents a vacuum being formed as you use fuel as this will cause the engine to die. I'm clutching at straws here really as if this were the case it would probably start ok then die during a run. A quick test would simply to open the filler cap when you have a problem as this would relieve any vacuum. |
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Stevex wrote: