check your wiring around the head stock for damage ?
after turning it over are the plugs getting wet i.e. any fuel
may be the injectors check the wiring on them too
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| XB12 has spark, primes but doesn't start https://www.ukbeg.com/forum/viewtopic.php?f=8&t=22343 |
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| Author: | AB [ 13 May 2017 09:03 ] |
| Post subject: | XB12 has spark, primes but doesn't start |
I had a look through the threads but couldn't find a similar problem. Probably my bad searches tbh. Anyway. I'm on the M8 extension last Saturday, the bike has an initial loss of power - hundred meter maybe - before cutting out and coasting to a halt. Recovered home on a lorry... I have a spark. All the fuses are intact. I have a fresh battery which is kept on a solarizer and the fuel pump can be heard to prime when the ignition is turned on. All the lights and dash lights come on. I don't have spyware. Before I arrange a trailer to my usual mechanic has anyone any ideas on what may have gone wrong? It's a one owner, annually services, 17k, 2004 bike. Thanks |
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| Author: | conquistador [ 13 May 2017 13:08 ] |
| Post subject: | Re: XB12 has spark, primes but doesn't start |
I'd give Maz a call if I was you, quickest way to find out |
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| Author: | brother in buells [ 13 May 2017 15:55 ] |
| Post subject: | Re: XB12 has spark, primes but doesn't start |
What does it do when pressing the start button? Does it turn the engine over? |
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| Author: | Nutah [ 13 May 2017 16:09 ] |
| Post subject: | Re: XB12 has spark, primes but doesn't start |
check your wiring around the head stock for damage ? after turning it over are the plugs getting wet i.e. any fuel may be the injectors check the wiring on them too
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| Author: | AB [ 14 May 2017 07:57 ] |
| Post subject: | Re: XB12 has spark, primes but doesn't start |
Thanks for the replies. I'll keep you posted. |
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| Author: | AB [ 14 May 2017 07:59 ] |
| Post subject: | Re: XB12 has spark, primes but doesn't start |
Re engine turning over; everything appears as normal when I press the started beyond the engine not actually running. It's possible the 'turn over' is slightly higher in pitch... slightly... possibly. |
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| Author: | DaveH [ 14 May 2017 12:11 ] |
| Post subject: | Re: XB12 has spark, primes but doesn't start |
Higher cranking rate would indicate less compression. Have a look in that direction |
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| Author: | Maz [ 14 May 2017 13:01 ] |
| Post subject: | Re: XB12 has spark, primes but doesn't start |
Worst case scenario (because I'm a pessimist !)......oil pump drive gear stripped and taken out cam gears ?......or it's thrown its rear piston away 
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| Author: | AB [ 14 May 2017 14:53 ] |
| Post subject: | Re: XB12 has spark, primes but doesn't start |
Maz It's in the back of my mind. I'm in Scotland hence I've never visited. AB |
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| Author: | Maz [ 14 May 2017 17:36 ] |
| Post subject: | Re: XB12 has spark, primes but doesn't start |
Fingers crossed it's just a simple fix.....and if it is, maybe time to start thinking seriously about upgrading the pump drive 
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| Author: | marcus_asparagus [ 14 May 2017 20:15 ] |
| Post subject: | Re: XB12 has spark, primes but doesn't start |
Oooooo, got me sweating now for the Uly. I've already done the Lightning but the old one came out looking like new. Changed it anyway as I was in there, but who can supply these drive gears now? If anyone is getting a supply can they add me to the list?  I need something for the mantle piece anyway! Many thanks Mark. |
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| Author: | AB [ 17 May 2017 09:44 ] |
| Post subject: | Re: XB12 has spark, primes but doesn't start |
Pushed the bike 0.9miles today which included a couple of hills... James at JK in Stirling - who looks after the bike - reckons it's the fuel pump and, right enough the prime noise is different. I told him no rush given I'd just rocked up with it. I'll keep you all posted... |
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| Author: | Nutah [ 17 May 2017 11:49 ] |
| Post subject: | Re: XB12 has spark, primes but doesn't start |
get your mechanic to check the fuel pump cables, as they can chafe ... viewtopic.php?f=8&t=14581&hilit=xb+fuel+pump+cable |
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| Author: | Nutah [ 17 May 2017 13:52 ] |
| Post subject: | Re: XB12 has spark, primes but doesn't start |
.....there's more viewtopic.php?f=17&t=20610 |
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| Author: | AB [ 24 May 2017 16:08 ] |
| Post subject: | Re: XB12 has spark, primes but doesn't start |
Fuel pump is fine. 30psi on the front cylinder and nowt on the rear... The pessimist may well have been right. Time to have a think 
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