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What's the matter with my Speed Triple?

Discussion in 'Biker's Cafe' started by killsta, Oct 10, 2018.

  1. killsta

    Mobster

    Joined: Oct 18, 2002

    Posts: 3,069

    Location: Around

    Morning!

    So...I've had my triple a few months now. When I first got her she would start immediately. Recently however, I now have to wait maybe 15-20 seconds before she'll turn over.

    This is obviously some electrical glitch, and I can only assume it's to do with the fuel pump/priming or something. When you turn the ignition on, you hear the fuel pump priming and when it's finished the bike will turn over and start. Up until then the starter button does nothing (i.e. doesn't attempt to turn over).

    Anyone seen anything like this before? The bike still starts and runs perfectly, just with this 15s delay!

    2015 Speed Triple :)
     
  2. Foghorn Leghorn

    Wise Guy

    Joined: Jul 5, 2003

    Posts: 2,383

    Location: Cheshire

    Does the pump always start priming as soon as you turn the key or does it vary by a few seconds each time?

    I'd be checking out the kill switch, clutch switch and side stand switch first.
     
  3. Fireskull

    Sgarrista

    Joined: Oct 31, 2006

    Posts: 9,657

    Location: Eastleigh / Winchester

    I think its normal to wait for the fuel pump to prime before turning over no? the issue is I guess priming should take 2-3 seconds not 15-20?
     
  4. Freeman

    Soldato

    Joined: Jul 24, 2004

    Posts: 5,564

    You should always wait until it's primed before starting it.

    Also, check that the battery has full charge.
     
  5. killsta

    Mobster

    Joined: Oct 18, 2002

    Posts: 3,069

    Location: Around

    Varies a few seconds. I was thinking it wasn't switch/sensor related...as I can be sat there with my thumb on the starter, no other changes, and as soon as the fuel pump stops (15 secs or so) it fires and starts immediately. Could be wrong, I'm no expert :D

    Yes correct, it used to be ignition on, by the time I've depressed the clutch, put the side stand up and moved my hand to the starter it's primed and starts. Now it takes 15 seconds or so.

    It happens when cold, or hot. I can stop it after a 30+ mile ride, try to immediately restart it and it takes 15 seconds. Could that still be battery related?
     
  6. MowyTone

    Mobster

    Joined: May 4, 2009

    Posts: 3,366

    Location: Southampton

    I would expect the starter to be laboured if the battery was going to be the issue as that is more of a strain than the pump priming. If it's taking more time to prime could it be a kink or blockage in the fuel line? But that would probably also be a problem when riding fast?
     
  7. killsta

    Mobster

    Joined: Oct 18, 2002

    Posts: 3,069

    Location: Around

    No issues whatsoever when it's started, redlines fine with no hesitancy *shrug*. I'm minded just to put up with it :p
     
  8. Fireskull

    Sgarrista

    Joined: Oct 31, 2006

    Posts: 9,657

    Location: Eastleigh / Winchester

    Might be worth asking on a dedicated Triumph forum or Facebook group, see if any other owners have had similar problems, or ask a local triumph dealer? could be a faulty fuel pump, could be a clogged strainer within the pump or something like that.
     
  9. Freeman

    Soldato

    Joined: Jul 24, 2004

    Posts: 5,564

    I still think it's worth checking the battery. I've had all sorts of issues with a low battery including the one you're describing on my Bonneville.
     
  10. Dogbreath

    Capodecina

    Joined: Oct 18, 2002

    Posts: 16,651

    Location: Devon

    Are you saying the fuel pump is priming for a full 15 seconds, or that it doesn't start priming until 15 seconds after the ignition is on?
     
  11. killsta

    Mobster

    Joined: Oct 18, 2002

    Posts: 3,069

    Location: Around

    It always starts priming immediately, just now it primes for longer.
     
  12. Malt_Vinegar

    Don

    Joined: Oct 20, 2002

    Posts: 15,175

    Location: In a house

    How does the priming system work on the bike?

    Is there a pressure regulator that decides when to stop the priming? Is it ECU controlled or handled by a relay? I would look at those parts. I presume the standard fuel pump is doing the priming, so it could perhaps be that the relay controlling it is sticky or faulty when it first kicks off.

    Also, is there an inline fuel filter, could a clogged up filter increase the pressure needed to prime the system?
     
    Last edited: Nov 22, 2018
  13. killsta

    Mobster

    Joined: Oct 18, 2002

    Posts: 3,069

    Location: Around

    Wow all that sounds pretty complicated. Is there anything I can tap with a hammer?

    I think I'll take it to someone who knows what they're doing :D
     
  14. Fireskull

    Sgarrista

    Joined: Oct 31, 2006

    Posts: 9,657

    Location: Eastleigh / Winchester

    Haha! Yeah just smack the fuel pump with a hammer and see what happens!
     
  15. Yaayuh!

    Capodecina

    Joined: Nov 5, 2010

    Posts: 19,925

    Straight from the Jeremy Clarkson school of mechanics :p
     
  16. .one.

    Mobster

    Joined: Aug 1, 2006

    Posts: 3,647

    I remember when I had a cbr1000 I used for 7 winters and the front brakes used to stick and because I was a lazy **** back then I would just thrash the calipers with a rubber hammer :D
     
  17. flea.rider

    Hitman

    Joined: Aug 7, 2017

    Posts: 938

  18. killsta

    Mobster

    Joined: Oct 18, 2002

    Posts: 3,069

    Location: Around

    Will do, ta!
     
  19. chris4652009

    Mobster

    Joined: Sep 24, 2013

    Posts: 2,645

    Do you mean it turns over for 15secs before firing up???
     
  20. killsta

    Mobster

    Joined: Oct 18, 2002

    Posts: 3,069

    Location: Around

    No doesn't turn over, the starter button does nothing for about 15 seconds :)