I actually like the new fan settings , no fan coming on when when you shut it down, unless its over 220C it will run and will shut off at 170C... seems to come on if your moving at over 150C . I'd rather it running when the motor is running ( can't hear it anyway with the micron ) and not draining the battery on short runs everytime I switch it off. When i first noticed the fan running all the time I thought I was running lean but it checked out fine when I datalogged... well within limits

What?
Sorry, I just stumbled in here.
Anyway, here you go...

Yes this is correct-I was just commenting on the efficiency of the scoop. My STT isn't affected by this Uly problem anyway.

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aka DrBagiva, DrBusqvarna, Uncle Knobhead

I can't hear my fan much above 60 mph and I don't think I'll be able to hear it at all when I've finished my new exhaust . I can see your point though ausxb, especially living in a warm country like Oz, and I know that a few of the guys on the US-based XBforums site are happier with the new arrangement, but for me, living in E.Lancs, I just cannot see the logic in having the fan on when a load of cold air is circulating around the engine at speed. I worry in particular about the life of the fan.
It looks like I'm going to have to work something out sometime over the winter.

Just told my dealer not to re-flash my ecu - so will stay with current settings and run when engine hot etc.

Where is the cable/connector that they would plug into anyway so I can put a label/tag on it not to re-flash the bike in the future ?

Thanks.
Eric.

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'09 XB12XT
'02 Beta Alp 200
'82 + '83 CX500 euroSports's
'83 CX650 Custom
Green "4 Legged" SUV

Thats fine Eric,

But remember that if you develop problems with your ECU in the future, ie, it needs re-flashing sometime or if you end up having to have a new ECU for some reason, (they come blank) you will get this download at some point.
I myself, can not see the problem. People seem to get really het up about this fan running. It's a quirk of the bike, always has been.... nothing new there
All 2010 XB's for those lucky enough to have one, will have the fan set up this way, re the fueling, they are among the best set up Buells out of the crate to date.
Buell have tried to bring their 08 09 models up to an equivalent standard using this download. It isn't as smooth as the 2010 set up, as it's a compromise IMHO.
Still, in most cases, it is another improvement, something which Buell have continually worked on since 08 when the DDFI 3 came into being.

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Now Beaming all over!

Hi Jon - since the update you did at the 20,000 mile service (as I mentioned in my American Thunder feature) the biggest differences are to the warm up procedure and the point at which the fan runs. Since the update the engine has to be very hot before it runs.

In normal open road riding conditions it won't come on (it never did before) and now it doesn't always run when I switch the engine off.

_________________
Chris & Jane Jessop
Founders of UKBEG April 1998

www.ukbuellgroup.co.uk

Hi C3. I don't think we can be talking about the very latest reflash. Mine got done in early October. I tried to alert people to it in my post in Buell Chat Aug 7th "Fan Woes".
Again, this new setting is NOT temperature controlled. It is speed controlled. Have a look once again at MCs post which started off this thread. He has just had the latest download to his new ECM. I would love for my bike to be like yours, with the fan hardly coming on at all (ie) like it used to be before this reflash was done - as would MC no doubt.
I agree with Jon's point about the fan being a quirk of the bike. I used to find it quite an interesting and endearing feature, and I used to enjoy watching the reaction on peoples faces as the fan clicked on when I switched off and walked away. Something different to the usual stuff on 2 wheels.
However there's nothing interesting about the fan being on flat out when doing a steady 70 mph on the motorway on a cool day (and I have a RH scoop fitted) and I don't think I'll find it an endearing feature when I'm down in the South of France or Italy or somewhere and the fan has packed in altogether through continuous running.
As for the new reflash aiding smoother running, I did not detect the slightest difference. My bike was a smooth as silk when it went in for its service and it still is. No problems with the running. The 2010 bikes that you mention, which have the new ECM setting probably are smoother, but I believe that there are also other features at work here, like 02 sensors fitted to both header pipes ( I think? Someone might correct me).
As for getting all "Het up", well, I can see what you're saying. It's not all that significant in the scheme of things and I do have far more important things in my life to worry about but the facts are that I had a bike that I was completely happy with, given a reflash that I didn't ask for or give permission for and now I have a bike that I'm not completely happy with - having undergone a modification that is irreversible. So I'm now just trying to come up with a technical solution to get around the problem - and I guess there'll be others interested too.

Just to clarify what the new reflash does:

1. I could fire up the engine and leaving it ticking over until it ran out of fuel. The fan would not come on.
2. Once I get running, at about 18mph, on come the fan.
3. It stays on. 30mph, 90mph, hot day, cold day, up hill, down hill, motorway, back roads, any revs, any gear, it stays on.
4. When I come into traffic and slow down to below 15mph, the fan goes off. I can be in stop- start traffic for half an hour. The fan stays off. (as long as I don't exceed 18mph).
5. When I finish a long ride, even on a warm day, I switch the engine off and..................silence. No fan.

If anyone can explain the logic of that, then I'm all ears.

I know that some people are quite happy with the arrangement, and that's fine, but I for one, will work something else out.

oh, and I forgot to add:

Setting aside the fan issue, its the best bike I've ever owned.

It would appear not ...

My last update/reflash was done at 20,401 miles, 29th August 2009.

I can only assume that my update has been updated - I'll confirm this when the bike goes to Jon at Black Bear for its 25,000 mile service.

_________________
Chris & Jane Jessop
Founders of UKBEG April 1998

www.ukbuellgroup.co.uk

Well my ongoing problem with it running lumpy and sometimes stalling happened again today. I'm beginning to think it's heat related. Rode about 10miles doing a steady 70/75mph. Stopped at tescos to refuel then pulled up in the car park to meet some others. After about 10min we rode off. It was at this point my bike started in this lumpy mode. The tickover was up and down to the point it stalled. Pulling away at a junction and it nearly stalled again. I have to keep the revs up manually when this happens to prevent a stall. When accelerating, when it's like this, the bike pulls but it's a rather flat experience and really lumpy in traffic. Anyway, rode the bike for a few miles afterward doing a steady 30-40mph through windy roads and the bike naturally improved. I'm convinced it's a cooling problem. My bike stops, fan kicks in and shuts down when it's finished but I think the rear cylinder is still cooking. Turn the bike on and I think the rear cylinder by then is so hot that the ECU is shutting down that cylinder until the temp drops - hence why my bike is running poorly from time to time after a stop. Why it's an intermittent problem is beyond me. Todays temperature was not exactly warm either!! Where I go from here is unclear?

So, maybe Buell were aware of this and thats why they introduced a R/H scoop and adjusted the fan to kick in when above 15mph?? They are obviously trying to cool the rear cylinder as much as possible - why? - probably because they've had problems maybe? But what do I know, I'm only the customer!

Just a thought but have you checked your earths:-
viewtopic.php?f=8&t=466


Can be intermittent too!

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aka DrBagiva, DrBusqvarna, Uncle Knobhead

Yes I think its almost certainly an overheating issue - especially in certain states in the US - southern California, Florida etc, and as for your theory about it being too late by the time the fan kicks in (ie) its already too hot, you could well be right on that one.
I think I've decided to go far a manual switch, mounted on the RH controls so that I can use my judgement to control the fan. When I'm blasting along, it'll be off, when I come into traffic, I'll switch it on and leave it on. Hopefully I can then get the best of both ECU (old and new) set ups.
As for your running problem, yes, do check the earths. I think it was Flying Dutchman who had bad running problems for a long time, traced in the end to a bad earth.
There's something else you might want to check too. I bumped into a bloke recently at a popular local bike meeting spot who'd had similar problems to you with his XB. He solved the problem by replacing the HT leads with some good aftermarket jobs. The originals had just deteriorated with the heat from the engine

Cast your minds back to 2003. The factory claimed that the fan running after shut down was to cool the heads and stop oil 'cooking' inside them (no, I didn't believe it either since the very same oil lubes other parts that are much hotter ).
So what's changed - same heads, same oil, same old bullshite I suspect

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If your dreams don't scare you, they are not big enough.

Interesting! My problem all started when my front header pipe popped out of the cylinder. Can't think of any electrical connections in that area of the bike that I could have disturbed? Although similar I don't think the problem is the same.