k5 starting and backfire

[Duffo]

hi
i have a 1400 k5 it has just started to play up on starting sometimes it struggles to turn over then it will turn as normal then sometimes it will spin but not start then backfire through the exhaust  any ideas ? battery is new  changed plugs etc  voltage drops to 12 vlts when cranked

[KiwiCol]

Gidday Duffo & welcome to the forum.  We prefer if new members can introduce themselves here:  https://gsx1400owners.org/forum/index.php?board=20.0 before going on to ask questions.

There's a heap of things that could cause that which you describe.  Poor fuel, bad earth, dirty / wet connectors, bad connection or shorting in loom where it goes into the headlight, worn out starter, ignition switch issues.

So, tell us a bit more about the bike, is it a daily ride?  ie, not sat for months & now won't go.  Have you been doing any work on it & it's now playing up?  Has it been pressure washed & is now playing up?

There's plenty of info & clever guys here & they will get it sorted for ya, just a bit more background on the bike would help.   Oh, & pop into the intro section & say gidday, have a look at what others have done to give you an idea.

Cheers.

[SFC1000]

Sounds like a timing issue. Like when a worn cam chain jumps a tooth, or the ECU has gone south.
These are the worst options, hopefully it's something simple.

[grog]

If 14 get low volts to starter, turn slow, backfire, just what they do. You need to check volts at starter wire when cranking. If all ok, faulty starter motor. If volts not ok, need to check both positive and earth connections to find drop.

[seth]

Hope he comes back to see the info folk have left here as it looks like he joined asked the question and left without waiting for any answers .

[KiwiCol]

Yes, I just checked that too Seth, asked the question & hasn't logged back in since, or waited for answers.    Must of fixed it himself eh.

[Hooli]

Damn, I was going to tell him it's scrap & offer £25 for it.

[Mick_J]

Hope he comes back to see the info folk have left here as it looks like he joined asked the question and left without waiting for any answers .

Col scared him off by telling him to introduce himself before asking questions, must be a delicate little chap or chap-ess. 

[KiwiCol]

He never saw that Mick, he hasn't logged back in since he posted.          But yeah,    I'm a mongrel like that!   

[Will14]

All sorted now, drained the tank of diesel and filled with fresh unleaded - seems to run a bit better 

[SFC1000]

or his mates crossed his plug leads. 

[Kiwifruit]

Play nicely children 

[Duffo]

it is nice to know that there are  still people with a sense of humor ,
sorry i did not understand the protocol. i will take more time to read. i did not realize how quick you guys answer. so please accept my humble apologies' 

it has been playing up since last year but the bike had been played up as i could not ride it, due to an injury. so when i was able to ride again i purchased a new battery, but it still carried on doing it it starts first time initially then i can ride around fine. then when it is switched off and i go back even after 20 mins the thing backfires  sometimes it spins up fast and just wont start , then sometimes it seems to stall as if it was firing on the compression stroke.
now i will get back to the reading bit and wait for any suggestions (polite i hope)

[Eric GSX1400K3]

 :doh:still hasnt introduced himself....

[Duffo]

still trying to work that out

trying to work out how to post from the introduction page 

my age is not that good on computers