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Discussion Starter #1
hello friends, new member.

im a bit of a paranoid person in regards to my newly purchased 2011 burgman 400 and high temps in the summer and sitting in traffic. id like to add a bit of extra security for more piece of mind

I was looking to wire a variable dial/switch that would allow me to turn the fan on in those searing heat situations when im baking, err sitting at traffic lights. other cars are around me as well with their heat output, isnt helping.
 

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Discussion Starter #2
my questions were
-how many amps does the switch need to be, to activate the fan? was looking at a 5A but think that may be too little so was looking at this 20A ?

-I saw some videos on yt on how to wire it and one of the videos, the person wires it to the thermo fan switch on the radiator. im going to use posi locks though.

he installed a switch, but im looking to install an adjustable fan switch. would that be ok? I dont need to run the fan at full speed all the time. just a bit at times for better piece of mind, then turn it off and let the system kick in. I also want to add an inline radiator temp guage that gives readings with numbers, to get a more accurate number then the oem guage which is just placement.

im curious what the diameter of the radiator hose is. anybody know?
 

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On most motorcycles you can flash the ecu to vary most things I believe the temp the fan activates at is also adjustable. Rather than go to the lengths of fitting an extra device why not lower the temp the fan kicks on at?

Good luck
 

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Discussion Starter #7
thank you for the reply Steve. ecu is something id be too worried to mess with. thats more complex then installing a fan or switch for the summer months for me anyways. seems more cost as well, no?

my main question is, in the video, is it the correct way of going about activating the radiator fan manually?
 

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Still crazy after all these years
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If you are worried about hot days, the fan will turn on anyway - adding a manual override won't really add any value IMHO.

My bike rarely has problems with overheating, even on very hot days. The oil temperature is always around 90°C or may creep up to 100°C if I am sitting in traffic for a while, but in this case, the fan is turning anyway.

At the end of the day, that little fan isn't really going to make a whole lot of difference if it is very hot outside. The best way to keep the engine cool is by keeping moving, so that more air is flowing around the engine to carry heat away.
 

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Sorry I will try to answer your post but wil have to do it tommorrow...but basically you will need to wire the fan via a hot wire...live voltage... and a ground....somewhere on the frame with a switch in between these two. You activate the extra fan by operating the switch....ergo the manual over ride.
 

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im a bit of a paranoid person

THAT is what you should be working on fixing.......not the fan on the bike.

Seriously. As long as you can hear the fan run occasionally AND the "overheat" gauge or light does not come on......then you are good to go.

Gas engines are designed to operate just FINE over a fairly wide range of what humans consider to be really hot; no damage will be done.

If you insist on doing this, a simple switch is more than sufficient.......and getting any more complicated than that is likely to cause more DAMAGE than good.
You should be paranoid about your own skill level.

(Now to look at the rest of the posts.)
 

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OK, so it looks like logic and reason aren't going to work here so............

First you need a voltmeter to test the present equipment.

In most systems, the + wire to the fan is hot all the time and the "temperature switch" closes a path to ground when the temp goes up.
On some, it works exactly the opposite; the + is switched instead of the ground.

Your manual switch needs to duplicate the action of the automatic one.
 

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If the OP wants to do this, then he needs to create a bypass to turn the fan on manually without overriding the automatic control coming from the EFI.
If you just disconnect the automatic control and want to control the fan manually, you will do more damage than good, since the first time you forget to turn the fan on you risk overheating the bike.
That is why I asked what the point is - as you said, ER, if it is working automatically there is no real benefit in adding a manual override.
 

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Discussion Starter #17
@easy rider - thank you for the reply. you made an awesome movie. ending is too sad. I salute you!

my 2 previous scooter have head gaskets blown with white oil mixed inside. oem talk is awesome and im all for it. im locked on what I want to do. so please help me with what I want to do, not what we know and the service manual says.


3 things im going to do.

1-add a variable dial for the radiator fan
https://www.ebay.com/itm/30A-DC6-60V-PWM-Motor-Speed-Controller-Board-Dimmer-Current-Regulator-Display/113208289489

2- add a 120mm fan to the plastic panel that covers the spark plug cover. and use the above link dial to adjust fan speed as needed. I dont want need to run at full speed all the time.

3- add an inline radiator temp sensor so it gives me a number readout.
https://www.ebay.com/itm/18-22mm-Water-Temp-Temperature-Joint-Pipe-Sensor-Gauge-Radiator-Hose-Adap/113122869125

the video above shows him connecting into the thermal sensor on the radiator

this is the b400 sensor
https://imgur.com/a/BR1qTfs

so using the switch linked above. find the ground on the thermal sensor, splice into that with posi locks, then power the other side. turn dial on and adjust as needed. correct?

both adjustment fan dials will be connected directly to the battery because I want to have it running 20-30 seconds after I turn the bike off. the adjustment dials will be mounted in the left glove compartment. ill cut holes for the dials to mount. ill get some "project boxes to mount them in behind the glove boxes.

guys we can all give our opinions of what wed do, or think is right. lets keep the "why/ dont do it" talk to a minimum. if you think its wrong, or unnecessary, thats not helping me. I am locked on doing this.

I thank you all for any help you can give me. its very much appreciate and have an awesome weekend. cheers
 

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Discussion Starter #18 (Edited)
If the OP wants to do this, then he needs to create a bypass to turn the fan on manually without overriding the automatic control coming from the EFI.
If you just disconnect the automatic control and want to control the fan manually, you will do more damage than good, since the first time you forget to turn the fan on you risk overheating the bike.
That is why I asked what the point is - as you said, ER, if it is working automatically there is no real benefit in adding a manual override.
well im not rewiring the fan switch. im just tapping into it. and activating it when I want to. im tapping into the ground wire and connecting that to a switch. the other side to the battery. activating it when I want it on. but when I have the switch off the fan speed can work on its own. let it kick in when its getting the proper signal to turn on.

lets get away of what I cant do, and focus on doing what id like to do. I know, we all have ideas of what things should be and run it like oem, but from hard experience, and 2 blown head gaskets, im not listening to oem talk.

see the gsxr YT video. he explains what to do. tap a wire into the ground wire from the thermal switch and connect it to the fan dial switch I posted in the link. then connect the battery to the same fan dial. close the circuit when you turn it on. turn it off lets the oem system activate as needed

I saw many posts here and you all like helping. dont work against my project. help me with this please?
 
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