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I have a slight coolant leak from left rad. It is minimal, but it is still leaking. Is there something that can be added to coolant that will stop this for a little bit, until a new rad can be found, without creating potential problems.
 

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Is it leaking from the radiator itself or from a hose?
Sometimes you have to check the tightness of the hose clamps.
Left radiator leaks are a frequent complaint.
Maybe because the bike leans to the left on the side stand.
Depending on where the leaks are, you might me able to find a radiator or race shop that specialized in aluminum radiators.
That's what I did to fix a puncture in my left radiator upper tank section.
 

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My RC had a leaky left side rad also. I just found a replacement for it from someone here. I will probably have the leaking one repaired to use as a spare incase I may need it later.. nasty things can happen at track days...
I wouldn't recommend adding any of those stop leak products. They usually gum up and reduce the cooling effectiveness of radiators.
 
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