UK Buell Enthusiasts Group :: Uly won't run under 2000 revs.

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Uly won't run under 2000 revs. https://ukbeg.com/forum/viewtopic.php?f=8&t=14377	Page 1 of 2

Author:	Bikeralw [ 08 May 2012 15:14 ]
Post subject:	Uly won't run under 2000 revs.
Quite a newbie to Buells and this forum, but I wondered if anyone could help. I've covered about 1000 trouble free miles on my 07 Uly, but touring Scotland over the weekend it suddenly started to have all the symptoms of running on one cylinder (I'm a long term Guzzi owner!). It refuses to run at less than 2000rpm and is a pig to start. Over 2k revs it seems to run fine, and I managed the 200 miles home ok, but what a dog in traffic! I gave the bike a full service when I bought it, including iridium plugs. The bikes done 13000 miles.

Author:	Muppet [ 08 May 2012 17:54 ]
Post subject:	Re: Uly won't run under 2000 revs.
Was it wet/raining? I've had similar symptons in the past when absolutely pissing down but after a while it cleared up. I seem to recall it never occurred after I had the wiring loom replaced (long story, don't ask) under warranty but can't swear to that. Water getting into the electrics/ignition system somewhere I'd say. Clive

Author:	Nutah [ 08 May 2012 17:57 ]
Post subject:	Re: Uly won't run under 2000 revs.
check your H/T leads as they can rub through an short to earth

Author:	Maz [ 08 May 2012 18:12 ]
Post subject:	Re: Uly won't run under 2000 revs.
Buxton > Dukinfield = simples

Author:	Bikeralw [ 08 May 2012 18:53 ]
Post subject:	Re: Uly won't run under 2000 revs.
I've ordered new plug leads today as I'm going to try a plug change again anyway. A visit to if that doesn't work..

Author:	Maz [ 08 May 2012 20:11 ]
Post subject:	Re: Uly won't run under 2000 revs.
I keep plug leads in stock

Author:	Bikeralw [ 11 May 2012 11:24 ]
Post subject:	Re: Uly won't run under 2000 revs.
I've removed the coil and leads and have found the front HT lead is almost worn through to the core against the cylinder head. Maybe a bit of rain was all it needed to short out. New leads on order and I hope that cures the problem. Just as an aside, the previous owner has fitted a Dobeck Performance TFI fueller www.dobeckperformance.com This is designed to add fuel at low throttle and help with pick up. I have the set up instructions, but whatever the settings on the pots it doesn't seem to make much difference. Would you advise removing this, as it just seems to double or even treble the connections round the injectors? In my opinion the more wiring you have in this area, the more potential for faults to develop.

Author:	pash [ 11 May 2012 11:52 ]
Post subject:	Re: Uly won't run under 2000 revs.
Get rid of that Dobeck crap

Author:	barney [ 11 May 2012 13:46 ]
Post subject:	Re: Uly won't run under 2000 revs.
just removed a Kitech device (same shit different name ) from my uly, did the breather mod and changed plugs whilst air box base was off also put heat reflective tape on air box base . point being after a run to settle things down and recal AFV, runs better low revs Bikeralw wrote: as it just seems to double or even treble the connections round the injectors? In my opinion the more wiring you have in this area, the more potential for faults to develop. i think you answerd you own question i first checked AFV then reduced device to lowest setting go for ride CLL to reset AFV check AFV did the above then go for ride CLL to rest AFV Check AFV

Author:	pash [ 11 May 2012 13:51 ]
Post subject:	Re: Uly won't run under 2000 revs.
barney wrote: whilst air box base was off also put heat reflective tape on air box base . Wow, thought Edd and I were on our own there...

Author:	barney [ 11 May 2012 15:40 ]
Post subject:	Re: Uly won't run under 2000 revs.
makes perfect sense you got a v twin with air box above the v and heat rises so going to get warm there (warm air less Dense so less power) pash thinking about getting lambda fitted on front pipe (06 uly) is the 08 front lambda sensor wiring long enough to reach 06 main loom lambda connector and are the connectors the same ie not handed front ,rear . or have i got to cut, extend and splice wiring

Author:	pash [ 11 May 2012 16:13 ]
Post subject:	Re: Uly won't run under 2000 revs.
Wire is not long enough, however no need to splice, make a slave harness. Connectors are readily available.

Author:	Bikeralw [ 11 May 2012 18:12 ]
Post subject:	Re: Uly won't run under 2000 revs.
AFV? Bit new to all this terminology. I've just removed this fueller wiring and I noticed the rubber cap on the small pipe on the inlet stack had all but disintegrated. I don't know what this vacuum take off point is for, but I can see without a cap it will let air in and weaken the mixture especially at tickover.

Author:	barney [ 11 May 2012 19:09 ]
Post subject:	Re: Uly won't run under 2000 revs.
sound like you found the problem just needs new blanking cap or as temporary measure a piece of pipe with end blanked off ( small pipe with bolt in end ) be careful it's not going to catch or interfere with anything important AFV the lambda sensor samples the exhaust gas and check's remaining oxygen content , it then checks the fuel map whilst you are in closed loop lean area and can adjust the mixture for the whole map , AFV 100% as per map AFV 110% 10% more fuel across whole map (tickover to flat out ) please see link http://www.ecmspy.com/index.shtml ps if you don't reset AFV to 100% after fitting new cap bike will run rich untill warm and ridden in closed loop lean area and it has re-adjusted itself .

Author:	pash [ 11 May 2012 20:11 ]
Post subject:	Re: Uly won't run under 2000 revs.
May be if interest... viewtopic.php?f=8&t=8603

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