Fz6 S2 Fan problems

natefz6 · Brolly Dolly Joined: 06 Apr 2005 Karma :

Hi All,

So I have a new bike... YAY!! and I have a problem NO!!!

I got the bike of the father in law for a complete steal so I am not that disappointed and hopefully it should be an easy fix.

Basically during my commute yesterday I noticed after hooning it down the motorway when I hit town the temperature was shooting up sky high when stopping at lights and in slow moving traffic. It got to the point where the warning light came on just before I parked it up at work.. not good. It hit 125C at one point. So today on the way in I am thinking that maybe the fan is not kicking in, sure enough it wasn't. Anyway some googling revealed some common faults and remedies.

1, Fuse, I checked/tested that and it was fine.
2, Relay, swapped with the working headlight one of the same type no banana, headlights still work fan still didn't.
3, Fan motor, Lots of posts online seemed to suggest taking lots of things apart to test but some suggested going in to diag mode and selecting diag code 51. I did this and could hear the relay click but the fan was not turning. Giving it a jump start with my finger got it started and if I did this on the 1st cycle of the 5 tests it would continue to spin up for each next cycle with the momentum from the last.

So my question is. Is my assumption that the fan motor is screwed correct? or could it be there is not enough juice getting to it some how? The fan does sound a bit ropey when going so I think I am right but wanted to lean on the wisdom of "The Workshop" before parting with my hard earned. Smile

Thanks for taking the time!
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"no I didn't steal it that's just the way I ride"

natefz6 · Brolly Dolly Joined: 06 Apr 2005 Karma :

More to add..

On the way in to work this morning after the temp got to over 100c I gave the fan a spin to try and kick start it but had no joy. Sad

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"no I didn't steal it that's just the way I ride"

c_dug · Super Spammer Joined: 04 Sep 2007 Karma :

Never had a buggered fan motor on any of my bikes, even the really high mileage ones, not to say it doesn't happen mind, but it isn't the sort of thing that does much work on most bikes so I'd be surprised to see one die.

Relatively easy to test the motor anyway, hook it straight up to a 12v power source (such as your battery) and see if it spins.

Do you know what temperature it's supposed to come on at?
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Baffler186 · World Chat Champion Joined: 31 May 2013 Karma :

go on here: https://www.600riders.com/forum/index.php there's probably a very detailed write-up. Most people on there have S2s as well.

Whilst you're at at, check (change) your coolant as well, which I know isn't the cause but if you still get problems it's one thing more to rule out.
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natefz6 · Brolly Dolly Joined: 06 Apr 2005 Karma :

Cheers guys,

It seems that its quite common on the fz6n to get a stone stuck in the fan and either burn out the motor or pop the fuse.

I went through this last night https://www.600riders.com/forum/garage-mechanical-help/42274-radiator-fan-problem-diagnosis.html which seemed quite comprehensive but I got to step 6.

Pol Anorl · Banned Joined: 13 Apr 2010 Karma :

fans on the fazer never come on, mine was hot enough to cook a full roast on and it didnt come on, i think theyre set to like 120c...

just take the plug off the thermostat and run a wire from the plug for the fan and 1 to the thermostat to a switch then you can turn it on when you want which i do most days because why risk it over heating.
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Bikeless · World Chat Champion Joined: 27 Jun 2008 Karma :

The fan on my old blade was terrible for kicking in late, i wired a switch to it whilst still leaving the fan and sensor connected, if it started getting hot in traffic i just flicked it on till i was moving again.

natefz6 · Brolly Dolly Joined: 06 Apr 2005 Karma :

mmm OK,

I read in a quite few places it should come on at 100C certainly the other day the temp warning light was on and it was still doing jack. I have been looking on fleebay for a 2nd hand fan but there is nothing for my model that I could see. Year before and model after but nothing for mine.

I will try to find the connector for the fan again tonight (its hidden in the frame somewhere) and plum it to 12v to see if it spins. If it does I may fashion a switch.

Thanks again.
____________________
"no I didn't steal it that's just the way I ride"

Acerman · Banned Joined: 26 May 2015 Karma :

The big question is where does it read temp from, is it from radiator or engine temp? I quess its the radiator temp and as long as it kicks in your good, its not like engines where you have engine temp and boiling at 120. Like they say here add 12v direct to fan to check if its ok, measure with multimeter on the connection when its coming up to 120 if you get 12v. Maybe you need replacement of the thermostat, remove it and boilt it to check when it opens.

Matt B · World Chat Champion Joined: 01 May 2012 Karma :

On my S2 the fan always kicked in at 100 degrees.

natefz6 · Brolly Dolly Joined: 06 Apr 2005 Karma :

what the shuddering fook...

So I had little joy at finding the fan on ebay I thought I would get the part number and google that way https://parts.yamaha-motor.co.uk gave me the part number of BLOWER ASSY (4S8-12405-00-00) which some googling returns some scary shit!

https://www.motosport.com/motorcycle/oem-parts/yamaha/2008/fz6/radiator-hose/blower-assy/4s8-12405-00-00

£242 for a fan! is it made of gold?
____________________
"no I didn't steal it that's just the way I ride"

natefz6 · Brolly Dolly Joined: 06 Apr 2005 Karma :

Ahh found one on fleebay.

https://www.ebay.co.uk/itm/yamaha-fz6-2007-2008-2009-radiator-fan-blower-/281714149979?pt=LH_DefaultDomain_3&hash=item419778ca5b
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"no I didn't steal it that's just the way I ride"

Acerman · Banned Joined: 26 May 2015 Karma :

Pol Anorl · Banned Joined: 13 Apr 2010 Karma :

give the whole thing a good squirt of wd40 keep soaking it, it may be dry from being unused for so long...
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Val · World Chat Champion Joined: 03 Nov 2012 Karma :

P.addy · Red Rocket Joined: 14 Feb 2008 Karma :

Look up the price of an engine for when you cook the current one?

Just buy a fan and sort it?

natefz6 · Brolly Dolly Joined: 06 Apr 2005 Karma :

Got the new fan fitted at the garage as I did not have the time to do it myself. Its all working perfectly now.

Thanks for the advice.
____________________
"no I didn't steal it that's just the way I ride"

Shinigami · World Chat Champion Joined: 14 Feb 2012 Karma :

FYI, Fan on my FZ6 S2 comes on at around 100 degrees, while riding however temp iis normally 85 degrees and only reaches 100 on warm days in stop start traffic
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