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**B7ACKTHORN** · 09-14-2016, 04:06 AM

Re: Yamaha YZF R3 Owners Reviews and Experiences

Originally posted by leech View Post

Are you certain engine damage will occur if we shut off engine when fan is running? I've been doing that for the past 3.5 years.

Won't the bike cool down faster when it shuts off?

Originally posted by TheArcher84 View Post

Even I have the same doubt ...

Originally posted by Divya Sharan View Post

The main difference between an air cooled vs liquid cooled engine is the addition of a radiator and its fan. If engines cooled faster with ambient air, we wouldn't have had LC engines right?
See, the fan comes on only after a certain threshold is reached after which the system needs additional cooling from the fan to dissipate heat away from the engine. By not letting the bike do so, you're essentially robbing the engine from cooling down properly. This certainly will harm the components in the long term. The fist thing that will go kaput is the radiator relay, which will not turn the fan on even when required. Then, you may have valves not working properly due to overheating and the like.
Be patient, give the bike a minute. Put it in idle, let the fan stop and then take out the key.

Originally posted by Vivek_G View Post

I am still not getting it.... won't the engine temperature warning light come up before the coolant temperature reaches high enough to be detrimental

Seems, suddenly everybody is getting panic attacks about this fan thing, both in the Duke, which was queried by a good samaritan from the R3 to the Duke forum. Love it, don't we.

The snippet I posted a few seconds back in the Duke forum.

It is not a "SIN" to switch off the your engine, while the radiator fan is running. Most of the times, the fan turns off with the ignition is turned off, so is the kill switch. If it runs after ignition kill, there is no reason to be alarmed. The fan would switch off, almost in a few seconds of whirring. Ultimately it's not just cooling, but "EVEN" cooling that's what makes liquid cooled setup in favor. Air cooled engines always cooled in the manner of air flow which is, as we all know, effective, but not 100% effective. Liquid cooling circulates the "water" or " the coolant mixture liquid" around the cylinder jacket, around, so in this way the block is cooled evenly, front back, side, up, down, left right, whatsoever direction you may call it.

Based on my experience, yes, the CBR too has this trait, but switches off, say less than 15 seconds after its cooling ritual has been completed, that's hardly the time me undoing my gloves, to open the gate of my house. Fired her up again, parked her inside, and that's pretty much it. The fan was "gupchup".

Cheers!
VJ

**dineshaugustin** · 09-14-2016, 06:41 AM

Re: Yamaha YZF R3 Owners Reviews and Experiences

Originally posted by Deathwing View Post

Your better off using high octane petrol only the some reason being plus 250cc and being twin cylinder, if u have no choice, use petrol addictives during such instances, I believe anything higher than 300 needs good quality fuel.

Which dealer is better in chennai? I inquired in Sri motors they are quoting Rs.369125 ( on road) and waiting period is just 2 weeks.

I afraid they might be talking about the display bike. Dont know whether they did some revving while customer is coming to check the bike.

**Gollum** · 09-14-2016, 07:27 AM

Re: Yamaha YZF R3 Owners Reviews and Experiences

Originally posted by Divya Sharan View Post

Yes, it is bad. It usually doesn't take much long so that battery would get killed, but if you keep switching the bike off abruptly like that while the fan is still running, your engine will certainly suffer damage.

I did a little research on it.
The fan is behind the radiator.
Radiator cools down the coolant.
The coolant cools down the engine.

See the image below. behind this little cap is a fan like assembly with blades which move the coolant around the body of the engine.

Coolant moves through the body of the engine but not inside.

If the engine is not running, this little pump does not run.(am I wrong?) When this does not run, the radiator fan is only cooling the coolant that is stuck inside the radiator. This part of the coolant is not going anywhere.

All bikes these days have thermal shutdown threshold post which they turn off.

The engines are made from Aluminum, which cools down very quickly.

**Divya Sharan** · 09-14-2016, 07:33 AM

Re: Yamaha YZF R3 Owners Reviews and Experiences

Originally posted by chip94 View Post

I beg to differ. Nothing is going to happen to it. Ask all the 390 owners about it. I myself cant wait for 5-10min for the fan to shut off on my 390. I think letting it idle for about 30sec is good enough whether the fan is on or not.

Well, I'm yet to see a bike where the fan runs for 10 min after switching off the ignition. It's usually 30-45 seconds and after really long rides in traffic, maybe 2-3 minutes on smaller bikes (<650cc). Not sure if D390 is an exception here.
I would rather be safe than sorry because as I said the fan relay will be first to die in such cases and when required it won't power on.

**tanishq** · 09-14-2016, 10:40 AM

Re: Yamaha YZF R3 Owners Reviews and Experiences

Oil cooled "zinda baad" "zinda baad"....
Oil cooled "zinda baad" "zinda baad"......

:sly:

**dineshaugustin** · 09-14-2016, 11:52 AM

Re: Yamaha YZF R3 Owners Reviews and Experiences

Originally posted by tanishq View Post

Oil cooled "zinda baad" "zinda baad"....
Oil cooled "zinda baad" "zinda baad"......

:sly:

On the lighter note , liquid cooling is way more advanced and has many benefits which is mostly equipped in performance bikes. Just because someone forget to keep the fan running for few seconds, doesnot mean technology is invented for nothing

**tanishq** · 09-14-2016, 12:01 PM

Re: Yamaha YZF R3 Owners Reviews and Experiences

Originally posted by dineshaugustin View Post

On the lighter note , liquid cooling is way more advanced and has many benefits which is mostly equipped in performance bikes. Just because someone forget to keep the fan running for few seconds, doesnot mean technology is invented for nothing

I know bro!! Its was just in humour... So... Take it as a joke only...
No offence...!!

**dineshaugustin** · 09-14-2016, 12:08 PM

Re: Yamaha YZF R3 Owners Reviews and Experiences

Originally posted by Gollum View Post

I did a little research on it.
The fan is behind the radiator.
Radiator cools down the coolant.
The coolant cools down the engine.

See the image below. behind this little cap is a fan like assembly with blades which move the coolant around the body of the engine.

Coolant moves through the body of the engine but not inside.

If the engine is not running, this little pump does not run.(am I wrong?) When this does not run, the radiator fan is only cooling the coolant that is stuck inside the radiator. This part of the coolant is not going anywhere.

All bikes these days have thermal shutdown threshold post which they turn off.

The engines are made from Aluminum, which cools down very quickly.

As far as i know keeping the fan running on for few seconds while parking is good practice but its not bad either if you don't follow too.

But in traffic signal if you switch off the fan then the temperature will rise and in turns shut off the engine when the temperature reaches cutt off value. This will only happen when ridden in heavy traffic for long time to raise the temperature. So in short , in traffic it is mandatory to keep the fan on till it automatically switches off, but while parking, it is good practice to wait for few seconds to fan switch off.

This is what i would follow if iam in the same situation.

**drdanishkhannew.540** · 09-14-2016, 12:24 PM

Re: Yamaha YZF R3 Owners Reviews and Experiences

Dont know about the r3 but my r15 after being ridden in delhi traffic did start giving me a headache. The radiator fan would just keep goin on and on even.. earlier i used to keep the fan running when i used to reach home for 5 or so minutes before it stopped.. i asked my mechanics and he told me what was pointed out earlier.. dont switch it off in traffic. Ever. If its getting unbearable. Stop the bike and just wait for 5 mins before going back into traffic.. once you reach home when you know the bikes gonna rest you can switch it off.. been 8 years people still no darn effect on the engine or radiator.. bike purrs just like new..

**Gokul S1000rr** · 09-14-2016, 01:18 PM

Re: Yamaha YZF R3 Owners Reviews and Experiences

Hi dinesh,

I am not sure about sri motors. But I have had bad experience with sai ram motors located in padi. I went there for test driving r3. The way they handled the test bike(r3) was hell. I went there by 10am in the morning. After reaching there, a service person was asked to take the bike from service bay to in front of showroom. Immediately after starting the bike the person revved it to its max rpm like almost 10sec. He then rashly moved it and immediately applied the brake and did this again and again. I didn't at all like the way he treated the bike.

They had a minimum of 10mins test drive after which the bike automatically shutts off. But within 2mins the bike shut off for me. I was around a km away from the showroom and called the person responsible for handling r3. Then he said it's because of low fuel. He sent a person with a bottle of fuel and he filled that tank and started and revved it like to 12.5k rpm while I was sitting on the bike and watching the instrument. Then I decided I will not at all buy r3 in our country.

I mean r3 is such a wonderful bike but because of these idiots handling the bike same way they treat a low capacity scooty is really not acceptable.

So I would suggest you to not go for sai ram motors padi as my experience was very bad.

Ps. I also did my r15 v2.0 service there and it was a free service but they denied to do it free because I didn't do any paid service there before. For availing free service we need to have at least 2 services done there before according to them. Then I showed them Yamaha motors service terms and conditions and all the previous bill are proper and then only the chief person aggreed to free service.

**chip94** · 09-14-2016, 01:23 PM

Re: Yamaha YZF R3 Owners Reviews and Experiences

Originally posted by Divya Sharan View Post

Well, I'm yet to see a bike where the fan runs for 10 min after switching off the ignition. It's usually 30-45 seconds and after really long rides in traffic, maybe 2-3 minutes on smaller bikes (<650cc). Not sure if D390 is an exception here.
I would rather be safe than sorry because as I said the fan relay will be first to die in such cases and when required it won't power on.

Ask 390 owners. I have one myself and can't really wait for 5 min before the fan switches off. But yes, I don't switch the engine off in traffic.

**dineshaugustin** · 09-14-2016, 01:37 PM

Re: Yamaha YZF R3 Owners Reviews and Experiences

Originally posted by Gokul S1000rr View Post

Hi dinesh,

I am not sure about sri motors. But I have had bad experience with sai ram motors located in padi.

Thanks gokul, for pointing out. This is what bothers me. In a Bangalore Kawasaki showroom, they revved the bike which was kept for display just to impress the the customer. So when we book there is high probability they might give us display bike. Have to note down the chassis / engine number of display too just to avoid such incident.

Bwt which is biggest dealer in chennai. ? I never had any experience with Yamaha.

**Deathwing** · 09-14-2016, 02:46 PM

Re: Yamaha YZF R3 Owners Reviews and Experiences

Saw a blue r3 near tnagar, the rider wasn't even wearing a helmet, and later a brand new 600i where again you guessed it right no helmet on the rider. I don't even understand why such people get such high cc bikes can't even get the basic protection.

**Gollum** · 09-14-2016, 03:32 PM

Re: Yamaha YZF R3 Owners Reviews and Experiences

Originally posted by Gollum View Post

I did a little research on it.
The fan is behind the radiator.
Radiator cools down the coolant.
The coolant cools down the engine.

See the image below. behind this little cap is a fan like assembly with blades which move the coolant around the body of the engine.
[img]http://i.imgur.com/IwWTJAh.jpg[img]
Coolant moves through the body of the engine but not inside.
[img]http://easyscienceforkids.com/wp-content/uploads/2013/06/ICI.jpg[img]

If the engine is not running, this little pump (impeller) does not run.(am I wrong?) When this does not run, the radiator fan is only cooling the coolant that is stuck inside the radiator. This part of the coolant is not going anywhere.

All bikes these days have thermal shutdown threshold post which they turn off.

The engines are made from Aluminum, which cools down very quickly.

To add to this, I have noticed that in traffic, if I leave the Bike at idle for long (read 2min) the coolant heat level reaches 4 bars. If I twist the throttle slightly to take it to 3k RPM for 2-3 seconds, the heat level returns to 3 bars.
So this means that the impeller moves more rapidly because of this, thus making the coolant move more rapidly throughout its circuit.

**Divya Sharan** · 09-14-2016, 03:53 PM

Re: Yamaha YZF R3 Owners Reviews and Experiences

Originally posted by Gollum View Post

To add to this, I have noticed that in traffic, if I leave the Bike at idle for long (read 2min) the coolant heat level reaches 4 bars. If I twist the throttle slightly to take it to 3k RPM for 2-3 seconds, the heat level returns to 3 bars.
So this means that the impeller moves more rapidly because of this, thus making the coolant move more rapidly throughout its circuit.

That may not always be true though. A little feathering of the throttle does make the coolant flow. I mean 3-3.5k RPM at the most. Any higher and the engine won't be cooling anymore.

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