what is normal fan operation By grocerygetter (Read 1,354 times)

[grocerygetter]

I've just started riding my brand new 2007 JCL yy250t a week ago, and am wondering if the fan should be running basically 100% of the time at high speeds with the outside temp in the high 70's?

It doesn't come on until i hit the middle of the temp gauge which seems normal, it will cycle on and off a few times for a while before it decides it needs to stay on. Seems pretty consistent.

It will turn off after a 50-60mph ride when i slow down and drive thru town on the way home.

Nothing seems wrong except I have a hard time believing that it should run 100% of the time at higher speeds.
*** I have wrapped my gas tank 75% with thick foil and have a piece of window screen fabric in front of the rad - if this constant operation isn't normal for this bike at these relatively low temps, then I wonder if I caused this?

Just worried that the fan will burn out early if on all the time.

Thoughts?

[scooteraddict]

No. That seems normal however I recently drained some of my system and then refilled it up again. This time around I made sure that I completely got all the air out. Now the gauge will be about the 1/3 mark and the fan turns on then the temperature rises above the 1/2 mark at which point the fan turns off. Go figure.

[rp]

I would have to ask why the screen? It may seem like it wouldn't effect the cooling, however it is slowing the air flow. Did it do it before the screen?

Good luck on your journey.

[go4it]

On my Roketa 250 54B the fan cycled on/off no matter how hot the temp was outside or how fast I was riding. To be the fan should not be staying on all the time expecally at only 70 degrees. If you start the motor and let it sit and idle does it cycle on/off and control the emgine temp no matter how long you let it sit?

Bob

[grocerygetter]

Sept 9, 2011 20:21:54 GMT -6 rp said:

I would have to ask why the screen? It may seem like it wouldn't effect the cooling, however it is slowing the air flow. Did it do it before the screen?

Good luck on your journey.

Screen is possibly being over cautious on my part.
I never drove it from new without the screen - thinking of taking it off and seeing if it makes a difference.
Locally i find we seem to have a lot of small pebbles on the road.
They spread stones basically in the winter as opposed to sand.
Been living here for 13yrs now and have never had to replace windshields like this anywhere else.
Some insurance companies here require you to have windshield insurance because of the amount of claims.
My wife's hemi Magnum is a summer car on paved roads only and before 40k on it we had to get the front clip painted. Completely riddled with stone chips, mostly hwy driving.
So i figured during my PDI i'd be proactive with the screen and protect the rad from the front wheel.

[grocerygetter]

Sept 11, 2011 1:04:32 GMT -6 go4it said:

On my Roketa 250 54B the fan cycled on/off no matter how hot the temp was outside or how fast I was riding. To be the fan should not be staying on all the time expecally at only 70 degrees. If you start the motor and let it sit and idle does it cycle on/off and control the emgine temp no matter how long you let it sit?

Bob

If i let it idle long enough from a cold start, the fan will cycle on and off.
seems to maintain the gauge at the halfway mark, so the system appears to be keeping up.
Just think it shouldn't be on all the time at higher speeds in cool weather.
Coolant level is holding the same. I tipped it way over when i refilled during PDI. It made a difference and got a bunch more in after that.
Not sure if it would still have an air lock though. What else would it be doing if in fact there was still air in there?
I would think it wouldn't be maintaining temp constantly like it is.
I'll remove the screen this week and see if that makes a difference.
BTW it's cooling down fast up here, only in the 60's here the other day, and the fan did not come on at all, until i stopped in the driveway at home for a second before i shut it down.
So everything seems consistant with outside temp.

[go4it]

Sept 12, 2011 8:03:18 GMT -6 grocerygetter said:

Sept 11, 2011 1:04:32 GMT -6 go4it said:

On my Roketa 250 54B the fan cycled on/off no matter how hot the temp was outside or how fast I was riding. To be the fan should not be staying on all the time expecally at only 70 degrees. If you start the motor and let it sit and idle does it cycle on/off and control the emgine temp no matter how long you let it sit?

Bob

If i let it idle long enough from a cold start, the fan will cycle on and off.
seems to maintain the gauge at the halfway mark, so the system appears to be keeping up.
Just think it shouldn't be on all the time at higher speeds in cool weather.
Coolant level is holding the same. I tipped it way over when i refilled during PDI. It made a difference and got a bunch more in after that.
Not sure if it would still have an air lock though. What else would it be doing if in fact there was still air in there?
I would think it wouldn't be maintaining temp constantly like it is.
I'll remove the screen this week and see if that makes a difference.
BTW it's cooling down fast up here, only in the 60's here the other day, and the fan did not come on at all, until i stopped in the driveway at home for a second before i shut it down.
So everything seems consistant with outside temp.

Honestly it does sound like the screen is having an effect. The faster your running the engine the more air moement it needs over the coil. So the fact it is working fine when idleing leads me to believe it is the screen. As I think I said I have ridden at 60+ MPH in 90+ heat and the fan always cycled on/off.

Due to the colder weather you may want to just waittill next summer. But eventually I would recommend you try removing the screen as a test. I have heard of some scooter models having a problem funneling the air properly over the coil from the fan. So if the screen removal doesn't solve it I'd take a look at how the air is moving over the coil. Bob

[grocerygetter]

Sept 12, 2011 15:19:03 GMT -6 go4it said:

Honestly it does sound like the screen is having an effect. The faster your running the engine the more air moement it needs over the coil. So the fact it is working fine when idleing leads me to believe it is the screen. As I think I said I have ridden at 60+ MPH in 90+ heat and the fan always cycled on/off.

Due to the colder weather you may want to just waittill next summer. But eventually I would recommend you try removing the screen as a test. I have heard of some scooter models having a problem funneling the air properly over the coil from the fan. So if the screen removal doesn't solve it I'd take a look at how the air is moving over the coil. Bob

As much as I want to take it out and see if it makes a difference, I think I'll leave it now as you say because today is supposed to be the last warm day this yr.

It's capable of cycling and maintaining middle of the gauge, so if it has to stay on then I agree it must be compensating for the screen.

Spring time will tell I guess, unless we get some awesome days this fall.

[go4it]

Sept 13, 2011 18:39:12 GMT -6 grocerygetter said:

Sept 12, 2011 15:19:03 GMT -6 go4it said:

Honestly it does sound like the screen is having an effect. The faster your running the engine the more air moement it needs over the coil. So the fact it is working fine when idleing leads me to believe it is the screen. As I think I said I have ridden at 60+ MPH in 90+ heat and the fan always cycled on/off.

Due to the colder weather you may want to just waittill next summer. But eventually I would recommend you try removing the screen as a test. I have heard of some scooter models having a problem funneling the air properly over the coil from the fan. So if the screen removal doesn't solve it I'd take a look at how the air is moving over the coil. Bob

As much as I want to take it out and see if it makes a difference, I think I'll leave it now as you say because today is supposed to be the last warm day this yr.

It's capable of cycling and maintaining middle of the gauge, so if it has to stay on then I agree it must be compensating for the screen.

Spring time will tell I guess, unless we get some awesome days this fall.

I don't know what your scooter looks like but I am just wondering if you could do a simply modification. Of course head on air flow is always going to be stronger then a diverted air flow. However, if your head on flow is being restricted by the screen then maybe a diverted flow would actually be better and prevent stone damage. What I am thinking is to creat a box in front of the radiator using the screen as a front. But allow about an inch or so between the screen and the actual frount of the radiator. This would allow for air flow from both sides, top and bottom plus through the screen. I would think this would compensate for the screen blockage.

OK, now tell me that's how you already have it...LOL

Bob

[grocerygetter]

Sept 14, 2011 17:34:15 GMT -6 go4it said:

I don't know what your scooter looks like but I am just wondering if you could do a simply modification. Of course head on air flow is always going to be stronger then a diverted air flow. However, if your head on flow is being restricted by the screen then maybe a diverted flow would actually be better and prevent stone damage. What I am thinking is to creat a box in front of the radiator using the screen as a front. But allow about an inch or so between the screen and the actual frount of the radiator. This would allow for air flow from both sides, top and bottom plus through the screen. I would think this would compensate for the screen blockage.

OK, now tell me that's how you already have it...LOL

Bob

No fancy install right now.
I cut it to fit behind the black plastic shroud behind the front wheel, pulled the edges out around and then screwed the lower side panels and faring back on thru the black plastic shroud.

The screen is basically up tight against the black plastic shroud, not touching the rad. I considered the size of mesh but maybe still went too small.

Thanks for the idea. I'll probably put more effort into it in the spring. Soon it'll be keeping the salt and snow out

[ccoco]

250 CC OVER HEATING ?? GO OVER TO WAL-MART AUTOMOTIVE LOOK FOR A 16 OZ

GREEN BTL OF ((HY-PER LUBE SUPER COOLANT)) ,, USE AS DIRECTED DON'T OVER DO IT,, THIS WILL LOWER YOUR ENG. TEMP BY 20 DEG , YES , THAT IS WHAT THE BTL SAYS ,, WORKS ON MY 250 JCL