| Author | Message | ||
     Growl |
I have a 2006 Ulysses. Once the fan starts it will not shut off unless I kill the engine. However if I stop the engine for just an instant and then restart it - often times the fan remains off for miles... (why?) | ||
| M1combat |
How many miles are on it? If it's well broken in the fan should be able to cool the bike enough to turn itself off. I think it would require that you be moving though. I don't think it will turn off if sitting. Maybe the shutoff point is set lower than the turn on point? | ||
| Brent_crossbronkos |
Do a search on fans - plenty has been written about this issue. Fan runs a lot on most bikes. Usually, once the fan comes on (04XB12S) on my bike does not shut off until you stop the bike. Completely normal. Fan does not run as much on XB9's. | ||
| Mr2shim |
My fan runs like no tomorrow when it's 80+ out, but it's an 03. It has turned off while I was at a stop before which is strange then it'll turn on while on the interstate?!??! It has it's own mind/mood if you ask me. (Message edited by mr2shim on May 10, 2008) | ||
| Tbowdre |
I like this question too. mine will hardly shut off on its own while riding but if I turn the bike off and then back on it wont turn back on for awhile. is the is a set point issue with the ecm? I wish i could modify this setting with my directlink software (like im smarter than a buell engineer!!!??) | ||
| Werewulf |
mine never comes on when the bike is running, only after it is shut off.. i have been following some of these fan threads and no one has ever come up with a concrete explanation... | ||
| Packrat |
After I put a R/H air scoop on my '07 xb12s,the fan came on maybe half a dozen times in 4,000 miles of riding,,in Georgia, through the summer months..Best $200.00 I spent on the bike!! | ||
| M1combat |
"mine never comes on when the bike is running, only after it is shut off.. i have been following some of these fan threads and no one has ever come up with a concrete explanation..." That's exactly what mine tends to do... that's what it's for. It cools the rear head so the oil doesn't cook once you shut the bike off. It has the side benefit of running when the bike gets too warm in traffic. | ||
| Growl |
I have 9000 miles on the Uly. Example: I went on a 150 mile ride today. The fan came on when I was climbing a mountain and then stayed on even when cruising downhill in a cool shady canyon. I switched the engine off then on and the fan remained off for 20 minutes. | ||
| Alchemy |
Growl, Yes, I have noticed that. My understanding is that the temp the fan comes on is X and the fan will run until the temp drops Y degrees - something like 30 degrees - to the fan off temp Z. If the fan is running then the temp is probably below X but not yet to Z. If you cycle the ignition then the computer looks at the temperature and it is usually below X (since the fan has been running) and will not come on immediately. I have had the fan come on sitting in traffic when it is in the 30s. The fan will continue to run for quite a while even though I would love the engine to stay a little warmer. Cycling the ignition will kill the fan and let the engine run a little warmer and it may or may not come back on if I am past the traffic backups. I would like to be able to manually turn the fan on when sitting in traffic OR to be able to reset the fan/temp circuit manually without having to cycle the ignition key. Either way would improve my riding experience and not risk the engine as I see it. | ||
| Growl |
Alchemy: I appreciate your explanation... seems reasonable... It's useful that I can manually switch the fan off for certain situations. | ||
| Echo15 |
Mine has run constantly at 55mph with the outside temp at 45 degrees and not come on in stop & go traffic at 90 degrees. Go figure..... | ||
| Frausty12r |
Why worry? ----------------- FAN ON --------- FAN OFF KEY ON ---- 220°C(428°F) ---- 180°C(356°F) KEY OFF ---- 170°C(338°F) ---- 150°C(302°F) Before you go mod'n up your cooling system, ponder this.. The fan is two speed, and the ecm will know it's unplugged. *Check Engine Lamp* If the fan comes on, it probably needs to. You should be worried when it stops working imo. I believe the engineers who designed the cooling system, made it work the way it does for a reason. If it ain't broke, don't fix it. Good luck. (Message edited by frausty12r on May 12, 2008) | ||
| Sgthigg |
RS Air scoop might help you some. | ||
| Bombardier |
Had the same problem. Have replaced the head temp sensor and have wired in a 4 wire narrow band Lambda O2 sensor. The sensor now sends info to the ecm about 4 times per second instead of the standard one sending about once per second. The bike runs a lot better now and the only time the fan is coming on is after the bike is shut down. | ||
| Teddagreek |
Bombardier have wired in a 4 wire narrow band Lambda O2 sensor. The sensor now sends info to the ecm about 4 times per second instead of the standard one sending about once per second. Can you explain how you acomplished this I'd like to know... I'm thinking it might be time for some one to find a after market head temp sensor.... My fan barely runs while I'm riding and I've only heard it go on HI once and Beat the snot out of it.. | ||
| Retrittion |
my '07 12R runs the fan now and again, no real pattern that I can discern. Honestly I like the looks the bike and I get when I get off and the fan is whining -- most people look like the are afraid the bike is going to: a. explode b. melt c. sacrifice them or their children to the gods makes me smile...  | ||
| Hogs |
Still like to know how you could use this 4 wire 02 sensor???? | ||
| Bombardier |
NGK narrow band Lambda O2 sensor. 4 wires - black is the sensor wire grey is the ground reference wire 2 white wires to power the heater element. the black wire goes to the original input to the ecm. the grey and one of the white wires goes to the negative terminal on the battery under the seat. The other white wire needs to go to a wire that has 12v when the ignition switch is turned on. On my 07 bolt there is an orange wire under the seat that does this which is part of the lighting circuit which incidentally has a 15 amp fuse which is what the sensor requires. The heat to send time is about 8 seconds and it crosses the threshold about 4 times per second. I am going to change the O2 sensor temp settings in the other maps area to read about 100 degrees C so the ecm will read the O2 sensor earlier and on slow/cooler engine speeds. It is set at 600 degrees as a default setting and is governed I believe by the head temp sensor. As the std O2 required a high temp to start up the head temp was set to this temp before seeing any O2 info. This is my theory. Please feel free to correct me with fact at any time. What I do know is that my bike will now lift the front wheel without effort and has never run smoother( except for the IAT issue after a couple of hours) The fan also does not come on as often. Will let you all know how the O2 temp change affects it and the IAT changeout. |
