UK Buell Enthusiasts Group
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Xb12scg thunderstorm Japan spec
http://www.ukbeg.com/forum/viewtopic.php?f=8&t=22102
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Author:  pash [ Thu Jan 19, 2017 12:23 pm ]
Post subject:  Re: Xb12scg thunderstorm Japan spec

Log data or display live data and see if speed increases whilst cranking?

Author:  ribi [ Thu Jan 19, 2017 2:22 pm ]
Post subject:  Re: Xb12scg thunderstorm Japan spec

Just now I tested the relays I had 1 faulty I so i used one from my xb9 they look similar,but it isn't the fault, still no spark,I thought I'd got it ,no such luck,also found a loose wire at tps plug wasn't that either :headbang: :headbang: :headbang:

Author:  ribi [ Thu Jan 19, 2017 2:31 pm ]
Post subject:  Re: Xb12scg thunderstorm Japan spec

Ok I did log decoder just now tps was 4.0° clt. 28° rpm rises to 393

Author:  pash [ Thu Jan 19, 2017 3:08 pm ]
Post subject:  Re: Xb12scg thunderstorm Japan spec

And the plugs were out but they weren't sparking?

Author:  ribi [ Thu Jan 19, 2017 4:55 pm ]
Post subject:  Re: Xb12scg thunderstorm Japan spec

No spark

Author:  ribi [ Thu Jan 19, 2017 4:58 pm ]
Post subject:  Re: Xb12scg thunderstorm Japan spec

When I did coil active test it sparks as it should but I thought it looked week I will see if I can pick up some plugs tomorrow see if they make a difference

Author:  pash [ Thu Jan 19, 2017 5:00 pm ]
Post subject:  Re: Xb12scg thunderstorm Japan spec

pash wrote:
You obviously know what you are doing so apologies for repeating what you have already said or found out...

1. The plugs work
2. The leads work
3. The coil works
4. The harness between ECM and coil works
5. ECM output circuitry works

You haven't tested:
1. ECM input circuitry
2. Harness between ECM and crank position sensor
3. Crank position sensor
4. Any safety circuit (but you told me the clutch lever didn't make a difference)


So, now you have tested 1 to 3 of the bottom lost...

Finger is pointing to the safety circuits. Side stand switch etc. However you tell us the clutch makes no difference. Time to look at the wiring diagram...

Author:  pash [ Thu Jan 19, 2017 5:01 pm ]
Post subject:  Re: Xb12scg thunderstorm Japan spec

ribi wrote:
When I did coil active test it sparks as it should but I thought it looked week I will see if I can pick up some plugs tomorrow see if they make a difference

Kept that a secret didn't you...

So that could be the coil...

Do the plugs get wet when you try to start it?

Author:  ribi [ Fri Jan 20, 2017 2:40 am ]
Post subject:  Re: Xb12scg thunderstorm Japan spec

No secret ,the first time I tested it as I said perfect,I worked on it all day yesterday and retested when I did the log,,,and this time thought they looked week there not good plugs fitted £1 a piece cheap enough for testing before sourcing some expensive ones spare parts are hens teeth here really,,

Author:  ribi [ Fri Jan 20, 2017 2:49 am ]
Post subject:  Re: Xb12scg thunderstorm Japan spec

The motor won't spin with plugs in !! And according to the owner he just had a new fuel pump £300, although I'm not sure a thai could do it,I made my own extractor to pull the pump as I tested it last time I helped him,the engine not turning correctly might be down to the relay was no good and I see no reason to replace plugs until there sparking,,,will check safety items today,,many thanks Pash your a life line to me

Author:  ribi [ Fri Jan 20, 2017 3:08 am ]
Post subject:  Re: Xb12scg thunderstorm Japan spec

IF ,,it was a problem with ecm I would have trouble codes wouldn't I,I tested codes by the Jack lead also ,no codes came up

Author:  pash [ Fri Jan 20, 2017 6:32 am ]
Post subject:  Re: Xb12scg thunderstorm Japan spec

ribi wrote:
IF ,,it was a problem with ecm I would have trouble codes wouldn't I,I tested codes by the Jack lead also ,no codes came up

Only if the ecm knew it was broken.

If the motor wont spin wuth the plugs in then that suggests a battery, harness or starter motor problem. If it's the battery or feed to the motor you will hear a machine gun sound where there is insufficient current to maintain the solenoid when the engine is turned. You don't mention any noise of that description...

Author:  Tadpole [ Fri Jan 20, 2017 9:49 am ]
Post subject:  Re: Xb12scg thunderstorm Japan spec

I recon that there will be a black transit van turn up at Ribi's place and Pash will jump out to fix that bike with a big gold necklace and a ripped T shirt. Its not the A Team, its the cake team from Bristol. You've got a good man on the job Ribi :dance: :dance: :dance:

Author:  Bonzo [ Fri Jan 20, 2017 12:16 pm ]
Post subject:  Re: Xb12scg thunderstorm Japan spec

Tadpole wrote:
I recon that there will be a black transit van turn up at Ribi's place and Pash will jump out to fix that bike with a big gold necklace and a ripped T shirt.


It's quite a way to Thailand though lOl

Author:  pash [ Fri Jan 20, 2017 12:28 pm ]
Post subject:  Re: Xb12scg thunderstorm Japan spec

And it's full of ladymen. I'd despatch Willy to deal with both issues (ladymen and broken Buell)...

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