aliveagain
Needs a life
Posts: 5033
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posted June 08, 2009 06:50 PM
coolant fan
Are the fan motors interchangeable with any other models?A wire busted off on mine and I figured I'ld look for a good used one.My bike is a 2000 but if one off a 600 works then it gives me more room to search.
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aliveagain
Needs a life
Posts: 5033
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posted June 09, 2009 05:08 PM
I ended up getting a used one off of ebay.It was actually from my local dealer.They insisted it wouldn't work being that it was for a 2002 but I told them I still wanted to see it.I was able to remove the motor and it lines up perfectly with the 2000 fan frame mount.I only had to get 3 small bolts to attach it to the fan frame.On the 2000,the screws thread into the motor.On the 2002 and up, the bolts screws into the frame.
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I wondered why the baseball kept getting bigger. Then it hit me.
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Fantomet
Expert Class
zx12r2000
Posts: 119
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posted June 10, 2009 12:56 AM
I have a question about heat and fan. Is it possible to make the fan start at a littlebit lower temperature? Overheating is a problem at low speed!
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2000 12
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ranger1
Parking Attendant
Posts: 7
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posted June 10, 2009 05:43 PM
The Best way to resolve overheating problems is to hard wire the fan. I have a 2001 ZX 12r and mine was getting hot everytime I stopped at a light or traveled at low speed. Its a very easy fix. All you need is a toggle switch from your local auto parts store, about 6ft of wire and a good solid ground. First connect a new piece of wire to your positive on Battery. Make sure its long enough to reach the other side of bike where fan is located. Then hook the positive wire to your supply on switch. then connect the supply wire comming from fan to supply on switch. last find a good ground on bike like on a solid part of the frame, connect that to the earth/ground on the switch and also coonect that wire to the other fan wire. You can then control fan when ever you like. I turn my on as I am approaching red lights and when I am in stop and go traffic. I have not have a issue since. good luck
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Rock4173
Novice Class
Posts: 43
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posted June 11, 2009 08:29 AM
There is a easier way. Just take a switch and tie one leg of it to each side of the therma switch in the radiator and that's it. The thermal switch in the radiator is normally open and when it heats up it closes. This is the way I have both my bikes ZX9 and ZX12. This set up does not require any other connection.
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Fantomet
Expert Class
zx12r2000
Posts: 119
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posted June 11, 2009 10:37 AM
Im from norway and i dont quite understand what u mean Rock. Can u please explain a littlebit more "easy"?
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aliveagain
Needs a life
Posts: 5033
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posted June 11, 2009 12:13 PM
On that toggle switch modification,if you forget to turn it off,will it run the battery down?
Fantomet,I believe he is saying to split the switch in between the two wires to the sensor on the left side of the radiator.
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I wondered why the baseball kept getting bigger. Then it hit me.
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ranger1
Parking Attendant
Posts: 7
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posted June 11, 2009 05:27 PM
Of Course if you leave the fan on it will run the battery down. I Purchased a lighted toggle switch to remind me its on. If the bike is running the rectifier will compensate for voltage being used by fan, and will maintain battery at a full charge. For example I was adjusting my clutch in my driveway at the hand lever. While adjusting I kept the bike running the entire time. I just turned the fan on and let it run. The bike stayed cool and I was able to adjust my clutch with out shutting the bike down. And when I was done I turned the bike off and it started right back up with a full charge. I have noticed that the models with the single fan has the heating problem. The dual fan set up stays pretty cool running off of the fan relay. Anyway thats my 2 cents. Peace ride safe
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krexken
Zone Head
Posts: 732
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posted June 12, 2009 08:40 AM
The problem isn't forgetting to turn it off, it's forgetting to turn it on. Rock's method is the ONLY way I would wire one, especially for someone else.
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busa4
Novice Class
Posts: 63
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posted June 16, 2009 06:14 PM
best way to solve overheating is to hard wire the fan?????? why would you give someone this very incorrect info? the best way to fix an overheating problem is to fix the problem not bypass the problem. check your coolant for the proper water/coolant ratio. check your coolant system for leaks. check your water pump, check to make sure both fans are turning on.
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Fantomet
Expert Class
zx12r2000
Posts: 119
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posted June 22, 2009 03:44 AM
I think overheating is a common problem on all zx12 - busa4.
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Rock4173
Novice Class
Posts: 43
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posted June 22, 2009 04:22 AM
Fantomet
Its simple the are two wires on the thermal switch located on the left side of the radiator. You just tap into those two wires with a togle switch one leg of the switch on each wire. To test the method just put a jumper across the two wires and the fan will come on. I found that the cooling sytem its self is fine its the fans dont pull enough air through the radiator the rpm on the fan is to low.
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Fantomet
Expert Class
zx12r2000
Posts: 119
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posted June 26, 2009 03:35 AM
Ive done it!
Works great!
Now my oil will last longer im sure!
Thanx guys!
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Fasttimez
Novice Class
Posts: 59
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posted June 28, 2009 08:54 AM
I've got mine wired off the thermal switch also, works great....Hey Busa4.....just because the bike gets alittle hot doesn't mean there's a problem, I have a suggestion for you, turn your bike on and let it sit there and run for 30-45 min. I guarantee it will overheat, the only reason you would put a switch on your fan is for really hot days riding in traffic very slow like a traffic jam or bike week conditions, or for drag racing....
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natlbnldr
Parking Attendant
Posts: 1
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posted June 29, 2009 04:06 PM
Hi guys new to the site, But wanted to give my input. I was riding in stop and go traffic this weekend at the beach, I have a 01 ZX12 and it ran hot the whole time. I think I'll try your method Rock. Will this kick the fan on automatically, or will i have to flip the switch manually?
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Megabyte
Pro
Posts: 1047
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posted June 29, 2009 08:33 PM
quote:
I think overheating is a common problem on all zx12 - busa4.
specially if you're running a high compression stroker. If my temp gauge gets past 1/2 way to hot, it's a crap shoot if she will start w/o a 1/2 hour cool down.
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thekaz
Needs a job
spell chequer is bustimicated
Posts: 2909
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posted June 29, 2009 08:43 PM
I find these threads odd in that my 12R has never overheated ? I do live in Western Canada but even on several trips in California I just never had a problem ? I have let it idle for long periods during winter storage .....
I am aware that if the thermo fan switch were to fail I am gunna need a paper clip to get me home but until then it just seems to work 
I do run WaterWetter with a synthetic diesel engine antifreeze ( its purple and free from my work LOL ) with my Kleen air system removed.
I have not had an overheating problem so I have not done any tempurature measurements but have you guys with overheating problems ever checked your temperatures? How close is the bar gauge to a laser reader ? and how many bars is everyone considering "overheating" ?
Anyone ever plumbed an oil cooler on one of these beasts ?
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Fantomet
Expert Class
zx12r2000
Posts: 119
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posted June 30, 2009 12:07 AM
What do you mean when u say u dont have a problem?
The temperature is so low on your bike that the fan never turns on?
Of course when my engine gets hot and the fan starts - the temp goes down.
The problem is - for me - that the fan starts too late. At a too high temp.
This makes the engineoil go bad. I feel i waste money on oilchange to often!
Ive tried several different oils - but they all becomes to "light" after a few overheatings.
Anybody out there who have the same problem?
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Fasttimez
Novice Class
Posts: 59
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posted June 30, 2009 03:15 AM
The problem is not that the bike actually overheats and pukes coolant out, it's just that on hot days, 90 degrees or more when sitting in traffic or going extremely slow through town the fan doesn't kick on until the temp bar is 3/4 of the way up, if you can catch it early with a manual fan switch it's alot easier on the engine....my friend found a thermal switch from his work that cuts the fans on at 175 degrees, it was a direct replacement for the one in his radiator, he's trying to find out the part number and manufactuer now so I can do away with my switch and run that.
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Fantomet
Expert Class
zx12r2000
Posts: 119
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posted June 30, 2009 03:42 AM
 Edited By: Fantomet on 30 Jun 2009 11:42
Please tell me when u find out manufacturer and number!
On how many degrees does the original thermal switch start?
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thekaz
Needs a job
spell chequer is bustimicated
Posts: 2909
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posted June 30, 2009 06:30 AM
Edited By: thekaz on 30 Jun 2009 14:54
quote:
What do you mean when u say u dont have a problem?
The temperature is so low on your bike that the fan never turns on?
Of course when my engine gets hot and the fan starts - the temp goes down.
The problem is - for me - that the fan starts too late. At a too high temp.
This makes the engineoil go bad. I feel i waste money on oilchange to often!
Ive tried several different oils - but they all becomes to "light" after a few overheatings.
Anybody out there who have the same problem?
Ok so if your bike is boiling the oil there maybe quite the cooling problem 
And ya my bike is running pretty cool but does heat up then the fan comes on in very heavy traffic or extended idling. But it does work the way it was engineered..... bike gets to 100plus the fan kicks in the bike cools down then the fan turns off. kinda like millions of cars out there with exactly the same kinda systems.
The book says the fan switch cuts in at 100-110C and cuts out at 97-103C which would be the sixth or seventh segement on the tempurature guage. My fan cuts in on the sixth and have yet to see the eighth segment yet..
I am REALLY hoping someone with intimate knowledge ( aaaa like Doug Meyer ) woudl chime in to actually define the words "over heating" for this motor ...... alot of guys are saying their bikes over heat in traffic but at what tempurature is the motor considered to be overheating ? As a mechanic I only work with numbers and specs and so far my bike has stayed within the specs according the factory manual
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Fasttimez
Novice Class
Posts: 59
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posted June 30, 2009 11:43 AM
The older ZX12's with the single cooling fan would from time to time overheat in stand still traffic or really slow traffic in hot weather, the newer ZX12's have 2 cooling fans which eliminated this problem but would still register quite high on the gauge before the fans would come on.... it's a personal preference to some people at what temp they want they're fan to come on at, that's why they put a switch on it. A bike is nothing like a car I hate say, you can't turn your bike on and walk away from it leaving it to run for an hour, it will overheat and bust the coolant hoses off of it, I've seen it personally happen 3 times to 3 different types of bike. The fans work well up to a certain point, but you're dealing with a very high compression engine that gets hot very quick...
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Lou_ZX12R
Expert Class
One Day at a Time
Posts: 196
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posted July 02, 2009 08:05 AM
I believe the temp issue is rather personal and depended on mods done to the bike. My 2000 engine is stock, I have yet to install the switch for turning the fan on manually. I have been in stop & go traffic many times in hot summer days and attend the Laconia bike week every year. To date my fan turns on and off as designed and I have not had any issues with over heating or degrading my oil. Yes the bike gets hot but it has never reach the highest temp level on the guage. I make it a point to change my anti-freeze every other year and mix it 50/50 with distilled water. The system is flushed before-hand and burped pretty good afterwards (to relieve air in the system). I use 20w/50 synthetic oil (not concerned with a pony or two loss for better protection). Currently I have over 35000 miles.
If you bore the engine or modify the internals you may need to be concerned with the temperture but I believe otherwise stock let it do what it was designed to do, imho
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2000 ZX12R 40shot
2012 ZX14R
2009 Concours 14
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