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View Poll Results: Do you use cardboard?
Yes, I use it. 6 16.22%
Yes, but I use something else besides cardboard. 2 5.41%
No, tried it and it doesn't help. 0 0%
No, havn't or don't want to. 29 78.38%
Voters: 37. You may not vote on this poll

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Old 12-04-2008, 04:34 AM   #1
ninjathatcould
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Cardboard on radiator

Last time I owned a Kawi ex-250 it was over 90F outside. I picked one up last weekend to start riding again, and I can't help but notice these bikes don't really like cold weather. At first it wouldn't start when the temp dropped below 50, but that was fixed with the idle mixture screws. So now I'm just noticing the coolant temp stays very cool, between 1% - 15% from the left unless I idle constantly or let it wind up in first and second gear.

So do any of you use cardboard on the radiator to help the coolant temp rise a little once the thermostat kicks in? I know it doesn't help with start up temps, I'm specifically talking about highway riding.
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Old 12-04-2008, 04:42 AM   #2
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No need in our climate.
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Old 12-04-2008, 04:52 AM   #3
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I figured so, seeing as it was 80 today but only going to be in the 50s tomorrow. I guess I'm just searching for a way to be certain the engine is warmed enough to rev it into 10ks.
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Old 12-04-2008, 08:30 AM   #4
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let it warm up, then ride it gently for a few minutes on colder days.
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Old 12-04-2008, 08:59 AM   #5
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What you gonna do pull over and remove the cardboard? The thermo wont open till warm anyway. Till it opens there is nothing going on with the rad. anyway. I dont see it helping.
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Old 12-04-2008, 09:36 AM   #6
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lol never heard of this, but when i had my zx-7 and my 250 in cold weather in dallas "it actually snows up there you sissy" Id just turn the choke way up and get her running then just let her warm up.
one of the main reasons I wanted to upgrade to fuel injection was so i wouldnt have to wait. but its not a big deal
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Old 12-04-2008, 09:53 PM   #7
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Quote:
Originally Posted by RojerLockless View Post
lol never heard of this, but when i had my zx-7 and my 250 in cold weather in dallas "it actually snows up there you sissy" Id just turn the choke way up and get her running then just let her warm up.
one of the main reasons I wanted to upgrade to fuel injection was so i wouldnt have to wait. but its not a big deal
I've actually experienced zx7 warm up versus buell FI warm up... and yeah it is worlds of difference. I don't like to leave bikes idling for more than a minute, though. I've always been told that idling to warm up is nothing more than wasting gas.

I'll never forget the day I went riding on my zx7 up in Denton and it was sleeting. Lost traction on my rear wheel when I was going around a corner and slid that back in when I got on the throttle. Talk about adrenaline rush.

I don't think overcooling the engine is anything we have to worry about here in Texas, so I'm not going to mess with any cardboard.
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Old 12-04-2008, 11:59 PM   #8
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Quote:
Originally Posted by ninjathatcould View Post
I've actually experienced zx7 warm up versus buell FI warm up... and yeah it is worlds of difference. I don't like to leave bikes idling for more than a minute, though. I've always been told that idling to warm up is nothing more than wasting gas.

I'll never forget the day I went riding on my zx7 up in Denton and it was sleeting. Lost traction on my rear wheel when I was going around a corner and slid that back in when I got on the throttle. Talk about adrenaline rush.

I don't think overcooling the engine is anything we have to worry about here in Texas, so I'm not going to mess with any cardboard.
This makes no since to me, so you are saying you hop right on your bike and take off? That is not at all good for your motor. I let my bike warm up till is over 100 everytime.
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Old 12-05-2008, 08:38 AM   #9
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it would be pretty cool if a ninja 250 would run well without a warmup. haven't seen one yet, but i have only been on about half a dozen new ones and a dozen older ones. all of them seem to run better if you give them enough time to warmup, at least enough to not have them try and stall on you.

I let my FI bike warmup as well when the weather is cold, let it idle until coolant temp is past 100, and go easy on it until temp is over 140 or so.
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Old 12-05-2008, 09:38 AM   #10
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That has got to be one of the dumbest ideas I have ever heard. We are in freakin Houston.....not a frozen tundra or Antarctica. Let the bike start and warm up for 2-3 mins before pulling away like you are supposed to. Make sure the choke cables are adjusted correctly and you are getting full choke when you pull it. Some bikes for colder climates, particularly 4 wheelers have coolant hoses that run from the engine to the carbureator, when the engine starts to warm up, the hot coolant circulates through the carb to help warm it up and aid in controlling fuel mixtures......But this is for like, Alaska, not Houston. Luckily for you, you can skip riding for a day and the temps will be back in the 70s.
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Old 12-05-2008, 11:26 AM   #11
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We use duct tape on the GP bikes, but they don't have thermo's.

We did use duct tape on the ninja250 during the 1st CMRA races the last 2 years. But it was like 30 deg. out side. It would not get up to temp even at race speeds so we duct taped it like our GP bikes. Worked great. Dunno about the street though.
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Old 12-07-2008, 07:09 PM   #12
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our friend at Jennie's meet and greet Saturday had his bike catch on fire because a calender was next to the engine/radiator lol... how it got there, I haven't a clue.
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Old 12-07-2008, 07:39 PM   #13
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Quote:
Originally Posted by CaligoneTx View Post
our friend at Jennie's meet and greet Saturday had his bike catch on fire because a calender was next to the engine/radiator lol... how it got there, I haven't a clue.

well if it was a calendar well ill tell you later
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Old 12-09-2008, 05:28 PM   #14
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i voted yes.....because i have used it in the past....but on a zx10 in texas weather i haven't needed it.....
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Old 12-10-2008, 10:53 AM   #15
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bad idea. The only people that should ever consider blocking their radiators are people with diesels.
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Old 12-11-2008, 01:04 AM   #16
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Just an update. I've tried blocking the upper half of the radiator and that was too much. Temps went higher than 50% on the coolant gauge at stoplights. So I tried about a quarter and that seemed to do the trick. Riding in 40F temps, the bike ran cool at stoplights and got out from under the Cold marking quicker when I first fired it up and ran down the road.

Back to the idling... I very rarely have to idle the bike over a minute to get it warm enough to ride. It never stalls when I drive off while the coolant temp is below the cold marking. I'll agree to disagree: idling for 2-3+ minutes is not for me since I ride very gently until the engine is warmed up.
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Old 12-11-2008, 02:53 AM   #17
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Always let the bike reach operating temp. keep the revs below 2500 or 3 k and take it easy. you also want to let the tires warm up and whatnot. the point is to get the oil up to temp so that u know it is flowing good enough to protect the internal moving parts. coolant temp is there to indicate if ur bike is overheating.. aslong as oil temp is up then ur good.. its a good thing that ur bike is running cooler.. better performance... just ride it harder and it will heat up
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