Maintenance & Technical > KX500 Original

KX 500 supermotard. (cooling problems).

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kawboy:
Hey guy's,
I ran a trackday on my '93 500 and it pushed alot of the coolant out the overflow. I had a small catch container, but it wasn't enough. In the dirt I've never had this problem. I pressure tested the cooling system up to 17psi with no leak down. I ran a 24:1 ratio on the road course. Any help would be appreciated.

ShadeTreeFab:
what rad cap and coolant are you using?

kawboy:
Stock cap. liquid performance with waterwetter.

ShadeTreeFab:
LP coolant is good, i like engine ice.if your rads are in good condition i would try a 1.6 cap. i think 1.1 is stock. maybe go up one on the main.

Polar-Bus:

--- Quote from: kawboy on October 02, 2010, 10:07:59 AM ---Hey guy's,
I ran a trackday on my '93 500 and it pushed alot of the coolant out the overflow. I had a small catch container, but it wasn't enough. In the dirt I've never had this problem. I pressure tested the cooling system up to 17psi with no leak down. I ran a 24:1 ratio on the road course. Any help would be appreciated.

--- End quote ---

Supermotard is as pretty demanding application on an MX based engine. I think you might simply need some bigger radiators ? (If all else mechanical checks out well). How big is the track, and what speeds and rpm's do you average ? Might be better to ask this question over in the S/M forum...

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