I remember a little while ago, someone was looking for a stock MC21/28 radiator to take base measurements from, to have a dual or triple core version made.

What happpened with the venture? Is there demand for a high efficiency radiator out there?



The above radiator is for the HRC RS125 and available through The Tuning Works. "RGVSean" says that he will be able to commission an NSR250/RS250 radiator to exceptionally high standards priced similar to that of the RS125 dual core one in the picture, and that a confirmed group purchase will give a better final price.
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Andy.
NSR-WORLD.COM

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Looks Awsome, lota money this ones 625 quid!!!!!!

It was me!!

It should cost in the region of £300.00 for the one I'm getting done... Should hopefully have a finished one soon.

I was very kindly loaned a stock rad by TW from the forum, so all the connections should work.
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NSR300R - Why did i ever have a 250...

I was also going to get some steering stems made up so you wouldn't have to destroy the NSR yokes if you wanted a new front end, but... They were only 30 a pop!
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NSR300R - Why did i ever have a 250...

Can I just ask, what the problem with the stock radiator?

Do people have problems with it overheating on the road, or even trackdays?

I've not had a problem with mine at all. The thermostat controls the temp anyway, so the rad isn't going to make anything cooler, the stat will still open and close at the same temp no matter what rad is fitted.

Only benefit I can see for a big rad like that is if your sitting in traffic on a hot summers day.

Someone please explain!

Well, that's a very very competitive price indeed! When are you expecting delivery?

£300 is the kind of money you can expect to pay for a 2nd-hand RS250 radiator normally!
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Andy.
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They LOOK cool

The cores are made by a company who do most of the racing rads for Cars and Bikes. The header tanks are made in house.

Curved ones are more than twice as much to make.

They are re-assuringly expensive but you gets what ya pays for.

A Suzuki rad for the RGV with a bit of extra capacity and buying cheaply in Europe is still 800 euro's..........£540

Thermostats are ok........on a road bike but struggle in race and track conditions by being fairly slow to react so the temp rises and falls a lot. A top quality rad like these will maintain better stabilty at your optimum temp. You don't actually need double core on your NSR if you go for a good quality core. By shrinking the header tanks we have got a 20% bigger and more efficient core so overall the rad is a similar external size needing no mods to the bike. Get the rad too close to an exhaust pipe/other heat source and you defeat the object.

It's an exlusive radiator. Once you've got your mini-indicators pipes and rear-sets what next

Was not planning on an NSR one but if there is interest let me know. Thanks to andy for showing the RS125 one.
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http://www.thetuningworks.com

Barry_MC21 wrote:Can I just ask, what the problem with the stock radiator?

Do people have problems with it overheating on the road, or even trackdays?

I've not had a problem with mine at all. The thermostat controls the temp anyway, so the rad isn't going to make anything cooler, the stat will still open and close at the same temp no matter what rad is fitted.

Only benefit I can see for a big rad like that is if your sitting in traffic on a hot summers day.

Someone please explain!

On the track my 300 runs at around 80-85 if it's a warm day... The 250 used to be at 70ish. Be nice to reduce the temp again.
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NSR300R - Why did i ever have a 250...

Barry_MC21 wrote:Can I just ask, what the problem with the stock radiator?

Do people have problems with it overheating on the road, or even trackdays?

Yes and yes, I saw 101*c on mine round London for the Chelsea bridge ride out on a cold wet evening, I believe Bill said his heat seized at 104*c. I also saw it well up in the 80's at Donington and it wasn't even hot that day. The thermostat is to maintain the temperature where it should be not to keep it cooler, the point is the stock radiator isn't up to the task of keeping a 60+bhp bike cool either in town or under constant load in the heat, hence there is an F3 and an HRC radiator, the problem is the '28 one (if not the '21 one) requires the HRC airbox as well and the pair will set you back the best part of a grand.
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maxim wrote:It was me!!

It should cost in the region of £300.00 for the one I'm getting done... Should hopefully have a finished one soon.

I was very kindly loaned a stock rad by TW from the forum, so all the connections should work.

PLEASE let us all know, thats a good price, and with stock connections thats even better, I havent had any issues with my cooling BUT hey! itll look cool and work better. id also be intrested in a stem!!!!!! my conversion is on hold just now but i will be doing one next year some time and most likely an rvf one if i can find a complete front end.

By the way i had a look around the tunningworks site!!!!!! cool as, they seem to do alot of bits and bobs and the most intreting is the replating....im guessing since its sponsored by the rgv site itll be a top notch job! you know what those fussy rgv owners are like LOL

The plating is done by a guy who does some of the 2-stroke motogp teams. He does not deal with the public.

The plating is different from the standard you get at the well known ones around the country. I don't know how or why as it is trade secret etc.

To give you an idea, when we get our RGV's plated we have to have the exhaust bridge relieved so it doesn't heat sieze or drag on the piston under heat expansion. 0.002". The bridge is not relieved from Suzuki on a new bike and has no problems. (ha ha you know what I mean)

With this guy the bridge also is not relieved as the job they do is 100%
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Maxim - For a 300 I can understand your going to produce more heat.

fontyy - I remember it well, but I never went above 80 on the same evening.

Out of interest, does anyone have any pics of an HRC airbox, either fitted or out?

Cheers

Just checked the price of an RGV radiator from Suzuki. £587 in the UK

Can anyone get the price of an NSR one?
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http://www.rgv250.co.uk
http://www.thetuningworks.com

I'm hoping to have a price and final details by the end of next week.
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NSR300R - Why did i ever have a 250...

rgvsean wrote:Just checked the price of an RGV radiator from Suzuki. £587 in the UK

Can anyone get the price of an NSR one?

£266 + VAT

Just a thought but has anyone with heating issues ever considered the thermostat might be f******.

Its a good bet given the state of maintenance carried out on your average road bike, that its NEVER been replaced since the bike was made.
Even the youngest NSR is 9 years old now.

£20 for a thermostat is not a lot to pay to cure the problem.
But as its not £300+, you cant SEE it and it's not a "trick" part then maybe thats why they don't get replaced?

Also it's not surprising there are problems when people run just water in the system as well.
http://photos1.blogger.com/img/233/8281/1024/WaterOutlet.jpg
Just imagine what the rest of the waterways are like.

If the problem was inherrent then every NSR would overheat.

Just for interest, a Honda RS125 race bike runs a "curved" radiator as standard and uses only one litre of coolant in the system. They only cost £280 + VAT and have no heating issues in race mode in hot weather. You usually have to run up to 4 pieces of duct tape across the rad on a cold day just to get them up to working temp.
Mind you they don't use a thermostat at all!!

NSR's like most bikes don't come out of the factory with heating problems!!!