Chinese oversized radiators?

[oldskool]

Has anyone had any experience with these 'made in china' alloy radiators? Do they do as they claim? ie: 25-30% cooler engine temp.
From what I can see they have wider vanes which are double sided. How is their fitment and build quality? My factory coolant capacity is 1 ltr. Is it safe to say the fluid volume will increase to 1300ml with an oversized rad?

[flyingcr250]

you should try one of those boysen high volume water pumps http://www.btosports.com/p/BOYWAT

[oldskool]

you should try one of those boysen high volume water pumps http://www.btosports.com/p/BOYWAT

Don't know if increasing the flowrate will help. The water churns through already. Actually wondering if I need to put a restrictor on the output end of the radiator. Water Wetter does diddly squat. Haven't tried a 1.6/1.8 bar cap yet...damn they're expensive for what they are!!

[barty5]

one of the yzfs we had last year had them they seamed ok cant say what the volume diff was just filled up sorry

[noobi]

The rated 25-30% increase, is a chinese measures so I wouldnt guarantee they will be 250-300ml greater capacity. Although its possible.
You also need to consider that increasing the capacity will most probably affect the fitment, so be aware of that.

Increasing the flowrate will help, although you need to be moving for it to make a difference.

[oldskool]

The rated 25-30% increase, is a chinese measures so I wouldnt guarantee they will be 250-300ml greater capacity. Although its possible.
You also need to consider that increasing the capacity will most probably affect the fitment, so be aware of that.

Increasing the flowrate will help, although you need to be moving for it to make a difference.

Thanks Noobi.
I've read in an earlier post Scott makes mention of a cheaper aftermarket 1.6 cap MR MX supplied other than the standard Kwaka 1.6. ....I've read elsewhere Kwaka supply 1.6 caps as standard on their machines, KTM 1.8, Yammy/Suzi/Honda 1.1
Do you know if you have any in stock?

[dafydd roberts]

Has anyone had any experience with these 'made in china' alloy radiators? Do they do as they claim? ie: 25-30% cooler engine temp.
From what I can see they have wider vanes which are double sided. How is their fitment and build quality? My factory coolant capacity is 1 ltr. Is it safe to say the fluid volume will increase to 1300ml with an oversized rad?

Yes they do hold more fluid, we was going to bring them in and sell to dealers but they are a bit rough and sometimes the sides are shaped to the point they look bent. From what I remember the CRF250X ones held about 150ml more each side than stock it could of been more but it was about two years ago now.

Also the plastics shrouds do not always mount up flush with the holes in the rads.

[oldskool]

Yes they do hold more fluid, we was going to bring them in and sell to dealers but they are a bit rough and sometimes the sides are shaped to the point they look bent. From what I remember the CRF250X ones held about 150ml more each side than stock it could of been more but it was about two years ago now.

Also the plastics shrouds do not always mount up flush with the holes in the rads.

Thanks Daf,
This is the one I am looking at. It seems reasonably priced and a lot cheaper than the other alternative in Oz.
http://www.trademe.co.nz/Browse/List...x?id=524810211
It's almost worth the punt for that price. A 20~30 psi rated bike rad cap would set me back close to $50 which is really a stop gap measure. Car caps are easy to find up to 16psi and are heaps cheaper but its hard to find one rated at 20psi.

[meteor]

I put one on a KX85. From memory it cost $140 landed here with hoses (3). Quality seemed ok from new but fitment wasn't perfect and the plastic air flow fins seemed to rub on it which over about 4 - 6 months rubbed a hole in the alloy. I went back to the company (through ebay) and with an exchange of photos a new one was sent free of charge. In comparison at that time a new one was around $450 and an aftermarket one similarly priced. Get what you pay for I guess... It was slightly bigger, I think the base under the fins was about an inch deeper. Hope that helps.

[dafydd roberts]

Thanks Daf,
This is the one I am looking at. It seems reasonably priced and a lot cheaper than the other alternative in Oz.
http://www.trademe.co.nz/Browse/List...x?id=524810211
It's almost worth the punt for that price. A 20~30 psi rated bike rad cap would set me back close to $50 which is really a stop gap measure. Car caps are easy to find up to 16psi and are heaps cheaper but its hard to find one rated at 20psi.

Yep they are the ones price is good as I remember our buy price out of China was around $70-80 NZD so yes well priced.

Do you have overheating issues?

[oldskool]

Yep they are the ones price is good as I remember our buy price out of China was around $70-80 NZD so yes well priced.

Do you have overheating issues?

My 14 y/o daughter rides a bigbore rmz and has a penchant to ride tight logged tracks at the sandpit. If she stops longer than a minute or two yep it starts to boil. Everywhere else she's fine. The overflow bottle I rigged up only helps so much. Over sized radiators and a higher pressure cap are on my shopping list so she can continue this urge.

[dafydd roberts]

My 14 y/o daughter rides a bigbore rmz and has a penchant to ride tight logged tracks at the sandpit. If she stops longer than a minute or two yep it starts to boil. Everywhere else she's fine. The overflow bottle I rigged up only helps so much. Over sized radiators and a higher pressure cap are on my shopping list so she can continue this urge.

I see right the rads are a good start but take it from me you need to rig a fan up of some sort it will stop it from boiling instantly there are a few home made ones on ebay if you have the $$$ try find a KTM or Honda fan kit and make it fit if Suzuki don't make an aftermarket part?

The high pressure caps are good we used to sell them but they can blow pipes off and in half.

[dafydd roberts]

http://www.ebay.com/itm/Universal-Mo...b47858&vxp=mtr

[Ktmboy]

I'd go for the fan option. My Berg used to boil really easily but since the fan has been fitted I can seriously bush bash with no over heating problems.
Surely there are some after market ones out there.

[sootie]

Has anyone had any experience with these 'made in china' alloy radiators? Do they do as they claim? ie: 25-30% cooler engine temp.
From what I can see they have wider vanes which are double sided. How is their fitment and build quality? My factory coolant capacity is 1 ltr. Is it safe to say the fluid volume will increase to 1300ml with an oversized rad?

I don't understand why you would want to run an engine 25% cooler. (??) Car engines & larger bike engines have an optimum temperature at which they are designed to run all the time. The cooling system (including the fan) should provide more than enough cooling for any driving/riding condtions or you have a design problem. The thermostat is intended to continuously adjust the coolant flowrate so that engine temperature is always correctly maintained.

Are you saying that you need more cooling to meet the conditions under which you operate some engine?
(The old English cars pre-60s often suffered from this problem when operated in NZ.)
An over advanced ignition, operating in 40 deg C temps or blocked radiator fins can obviously cause heating problems too.