Author Topic: Installing CBR radiator (Read 9680 times)

sangheraent · « **on:** April 05, 2016, 07:45:20 PM »

I am going to the dunes in 3 weeks and was going to buy a CBR or PWR radiator pretty sure its the same thing. I was going to buy it while out there to save on the tax but I will have to install it out there also.

My question is will it install easily into the factory spot? Is there any modification to the shrouds needed?

havinnoj · « **Reply #1 on:** April 05, 2016, 08:20:15 PM »

I have one on a stock 86 frame with OMF shrouds and [MENTION=9]Pumashine[/MENTION] radiator mounts. Zero fitment issues. Obviously being an 86 frame, I needed the correct radiator hoses to make it work.

sangheraent · « **Reply #2 on:** April 05, 2016, 09:02:28 PM »

I have a walsh frame, with a semi custom way of mounting my shrouds. my current radiator has the ends coming out and pointing in wards. I guess is that there shouldn't be any issues but I don't want to need something that I don't have there, especially since the local shop already ripped me off on my motor.

rablack21 · « **Reply #3 on:** April 06, 2016, 08:03:50 AM »

If your current radiator inlet and outlet points inwards, I am assuming you are saying that you have an 86 style radiator. If that is the case, you will need the 87-89 radiator hoses in order to run the CBR radiator. This should really be the only change that you need to make to run the new radiator. However, since you have a semi custom way of mounting your shrouds, there's no guarantee that you won't need to do a little modding there depending on the situation.

sangheraent · « **Reply #4 on:** April 06, 2016, 09:55:15 AM »

Are the 86 hoses just longer? Because my hoses already have a ton of slack I have them almost all the way up the radiator inlets and still there is slack.

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rablack21 · « **Reply #5 on:** April 06, 2016, 10:06:38 AM »

Quote from: sangheraent;66372

Are the 86 hoses just longer? Because my hoses already have a ton of slack I have them almost all the way up the radiator inlets and still there is slack.

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They route differently. I will try to find pictures.

F-Red · « **Reply #6 on:** April 06, 2016, 12:44:10 PM »

Quote from: rablack21;66368

87-89 radiator hoses.

86-87 uses different hoses than the 88-89. Why are they listed as 87-89 are the same? Will all hoses, work on all years of radiators?

Quote from: sangheraent;66372

Are the 86 hoses just longer? Because my hoses already have a ton of slack I have them almost all the way up the radiator inlets and still there is slack.

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It is obvious the radiators have different inlet and outlet angles. They may work. I would like to know as well.

rablack21 · « **Reply #7 on:** April 06, 2016, 12:57:00 PM »

Take a look at these pics in my build thread. I was converting from an 86 engine and 86 style radiator (curved inlet/outlet) to an 88 frame and 88-89 style CBR radiator (straight inlet/outlet). Take notice of the particular formed shapes and bends of the radiator hoses specifically the ones to and from the radiator.

Pics are about half way down the page.
http://trx250r.org/threads/4726-Little-Engine-That-Could-changed-to-BEAST-MODE/page3

Now let me find some pics of the 86-87 style radiator and hoses and you will see the difference.

rablack21 · « **Reply #8 on:** April 06, 2016, 01:02:24 PM »

I only have one pic, but this shows the different shape in the radiator hose for the 86/87 style radiators.

Look about half way down the thread.
http://trx250r.org/threads/3189-Project-Younger-Woman/page2

sangheraent · « **Reply #9 on:** April 06, 2016, 03:46:58 PM »

On ebay they sell 1 kit for 86 to 89 is that going to work for me?

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rablack21 · « **Reply #10 on:** April 06, 2016, 04:13:41 PM »

Quote from: sangheraent;66383

On ebay they sell 1 kit for 86 to 89 is that going to work for me?

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I'm seeing a separation between them.
Here is 88-89
http://www.ebay.com/itm/Aluminum-Radiator-black-HOSE-Honda-TRX250-TRX250R-88-89-1988-1989-TRX-250R-250-/262141032706?hash=item3d08d2b902:g:8rcAAOSwMpZUnJTJ&vxp=mtr

Here is 86-87
http://www.ebay.com/itm/For-Aluminum-Radiator-hose-Honda-TRX250-TRX250R-TRX-250R-1986-1987-86-87-/261582934894?hash=item3ce78ed36e:g:vUsAAOSwVFlUBtko&vxp=mtr

It may be POSSIBLE to mix and match years, but I betcha they won't fit as good as the years they are intended for. And you will need to be careful to make sure that the radiator hose doesn't touch your pipe also. Ebay is not a good place for fact checking.If you look at Honda part #'s, Honda changed the part number between years 87 and 88 because they changed they shape of the inlet and outlets. There is a reason that the hose shapes are different. It is to accommodate the different shaped inlet/outlet fittings. I would recommend you run the hoses that match the radiator fittings, unless you are running some type of universal unformed hose.
I hope this helps.

Aceman · « **Reply #11 on:** April 06, 2016, 06:08:07 PM »

I used an AFCO dual pass radiator on my 310, and it wants to run at 130 degrees at an idle. Hard duning will get it up to 180 degrees. It almost works too good. I used standard Napa heater hose along with the supplied AN fittings that came with the radiator. It wasn't any trouble to install.

sangheraent · « **Reply #12 on:** April 07, 2016, 10:10:48 PM »

last trip out my bike was detonating because of an incorrect head cut it ran like garbage and with my stock radiator it hovering around 200 unless I hit a straight. That was at florence and that place is flat, were going to winchester this time and I know I am going to be doing some treeshots and high rpm climbing without much room for straights so id rather be safe then sorry.

Aceman · « **Reply #13 on:** April 07, 2016, 11:34:33 PM »

That's where I run mine, is at Winchester. I haven't been to Florence yet.

If you fix your detonation issues, I would think your stock radiator should be more then plenty.

Skeans1 · « **Reply #14 on:** April 08, 2016, 08:07:19 PM »

Quote from: sangheraent;66406

last trip out my bike was detonating because of an incorrect head cut it ran like garbage and with my stock radiator it hovering around 200 unless I hit a straight. That was at florence and that place is flat, were going to winchester this time and I know I am going to be doing some treeshots and high rpm climbing without much room for straights so id rather be safe then sorry.

What motor? my puma is running a stock radiator without issues.