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Post by phil103 on May 6, 2015 18:30:19 GMT
My h-reg xj600 pre diversion was running absolutely fine yesterday. Put it in garage last night and when tried to start today it won't fire. Cranks over fine so no battery issues. No spark on plugs and plugs seem very dry for amount of cranking I've done. Any ideas welcome as need bike back on road ASAP. Nightmare having to use my car. Thanks in advance
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Post by kirriepete on May 6, 2015 18:34:50 GMT
Kill switch?
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Post by GAv on May 6, 2015 18:45:42 GMT
Sorry but it won't crank over if the kill switch is on. Apart from that the only thing that I can think of is if there are no sparks on all 4 cylinders is the rectifier,(is there a seperate fuse for that, Not being an electronic deihity, I would not really know that answer verbatim)except it may be worth checking.
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Post by phil103 on May 6, 2015 19:05:25 GMT
Thanks for replies. Definetley not kill switch tried that and nothing works with switch flicked. So odd been running totally fine until this morning. If it helps anyone Rickover has been a bit high lately
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Post by m40man on May 6, 2015 19:13:30 GMT
... No spark on plugs and plugs seem very dry for amount of cranking I've done. The first step is to work out which is the problem - no spark or no fuel getting through, as it's unlikely both issues would arise at the same time, even if it at first looks appears so. So try loosening the float bowl drain screws on the carb float bowls to see if fuel drips out. If it does, you've got fuel getting to the carbs, so concentrate on whether there really is a spark or not. If no fuel drips out, then it's a fuelling issue. Let us know if you get fuel out of the drain screws or not & we can take it from there.
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Post by phil103 on May 6, 2015 20:56:06 GMT
Ok managed to undo just one bleed screw on Middle right (throttle side) carb other three screws are mashed not budging and there was fuel coming out the bottom. Thanks again
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Post by Tigger on May 6, 2015 21:17:49 GMT
Dreaded green gunge in the multi plugs? Try seperating and cleaning all the multi plugs under the tank. Probably a dodgy connection under there somewhere
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Post by satnav on May 6, 2015 21:32:58 GMT
Easy way to check for a spark. Remove one plug, replace it in the HT lead and securely earth the plug against the engine.
Turn the engine over and you will be able to see if there is a spark or not.
Catastrophic failures like this are either ignition or fuel pump related. My prime suspect would be the rectifier, but check for a spark first.
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Post by phil103 on May 6, 2015 21:56:26 GMT
Done the test with spark plug on two cylinders no spark. Will pull all plugs and clean them
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Post by m40man on May 7, 2015 9:00:29 GMT
I think you'e looking for a broken wire then, rather than necessarily a failed electrical component. Check all the block connectors you can find, clean up any that are showing corrosion which might result in a poor connection. You may strike gold & find an actual broken one which you can fix. Do this before investing in any new or replacement parts.
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Post by phil103 on May 7, 2015 9:43:55 GMT
Thanks again. Taking tank off but can't work out how to turn tap off am I missing something. My kwakasaki is on res and off but no off on xj
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Post by m40man on May 7, 2015 10:04:52 GMT
Taking tank off but can't work out how to turn tap off am I missing something. The older XJ, like the Diversion, has a vacuum tap I believe - leave tap turned to 'on'. No fuel will gush out *. * Unless I'm wrong!
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Post by m40man on May 7, 2015 10:05:53 GMT
.... but check connectors under the seat / side panels too! I don't know if there are any under the tank.
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Post by satnav on May 7, 2015 17:48:11 GMT
Taking tank off but can't work out how to turn tap off am I missing something. The older XJ, like the Diversion, has a vacuum tap I believe - leave tap turned to 'on'. No fuel will gush out *. * Unless I'm wrong! Nice caveat. I'll have to try that in my next meeting.
I also suggests the lad doesn't smoke whilst trying this out.
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Post by m40man on May 7, 2015 17:51:11 GMT
I also suggests the lad doesn't smoke whilst trying this out. Hark at Mr Health 'n Safety .
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Post by GAv on May 7, 2015 18:09:56 GMT
Yes and All the shouting, isn't doing my TINITITUS any FAVOURS!
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Post by satnav on May 7, 2015 21:00:12 GMT
I also suggests the lad doesn't smoke whilst trying this out. Hark at Mr Health 'n Safety . I was just thinking of the bike. There aren't that many pre diversion XJ's about these days. Would hate to see his fire damaged.
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Post by phil103 on May 10, 2015 10:55:16 GMT
Thanks again for all your help. Couldn't bear not smoking so left tank in place. However checked all wiring connections stripped and cleaned them. Found regulator is not standard it it a 'tour Max high performance equipment' replacement wondering if this may be cause?
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Post by m40man on May 10, 2015 12:12:01 GMT
Found regulator is not standard it it a 'tour Max high performance equipment' replacement wondering if this may be cause? No. The fact it's been replaced just shows the original went bad or at least the previous owner thought it had. I used a Tourmax replacement on my Honda VFR750 & have one on one of my current bikes - work fine. They seem to be perfectly good replacements in my experience. Time to chew some nicotine gum & take the tank off & check for any connector blocks under there!
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Post by phil103 on May 10, 2015 16:18:17 GMT
Checked all plugs undertank they are all good. Still no spark. Put battery on to charge fully again so that'll be all charged back up. Any other ideas welcome
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Post by phil103 on May 10, 2015 22:57:05 GMT
Now I'm very confused. Battery was starting to die as cranked it over so much checking for spark after each section of loom stripped and cleaned so put it on charger to top it back up. Went in garage for something else and passing bike turned key pushed button and it fired straight up. Am totally at a loss why it suddenly burst into life as was cranking over quickly before battery went low.
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Post by satnav on May 10, 2015 23:53:58 GMT
Voodoo. Best call in a witch doctor mate.
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Post by phil103 on May 11, 2015 8:03:09 GMT
Just ridden it to work all fine except Tickover is now 2500 instead of 1200. Think phone call to local priest may be in order haha
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Post by phil103 on May 12, 2015 8:00:06 GMT
Unbelievable it's done it again. Rode it home fine now this morning no go. Wondering if battery may be at fault as ride home with lights on but no lights going to work. At a complete loss now
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Post by GAv on May 12, 2015 13:39:35 GMT
Hark at Mr Health 'n Safety . I was just thinking of the bike. There aren't that many pre diversion XJ's about these days. Would hate to see his fire damaged. hrm bit of unleaded, swan vestas, rag spark it up, bingo job done and it's a goodun only kiddin yar
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Post by CD on May 12, 2015 18:40:32 GMT
A weak battery can turn the starter but if volts drop too low the electronic ignition stops working My vote is a faulty wire connector. Check them ALL before spending money. It is VERY unlikely to be generator related as that has nothing to do with the ignition circuit. (Sort of- some carry the spark trigger sensor) But if it's not charging battery goes flat and the above happens. Engine revving at tickover is often an air leak making it run weak. Check the carb to cylinder head rubbers.
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Post by phil103 on May 12, 2015 21:17:38 GMT
Thanks for replies. All wires have been stripped checked cleaned and put back together. Left battery charging for an hour this evening and it decided to fire up again. Does anyone know what voltage I should be getting across the battery while it's running?
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Post by satnav on May 12, 2015 22:54:51 GMT
Around 13.5 to 14 V.
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Post by phil103 on Jun 1, 2015 8:50:10 GMT
Jumped it off car and got 14v across Battery even with lights on. thinking battery is at fault. Ideas welcome
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Post by m40man on Jun 1, 2015 10:23:29 GMT
I'd go with a new battery on that basis.
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