Cooling issue...odd to say the least

Bike is an 06 DRZ with an Eddie built 470.

I ran it hard today at the track (road race) and when I came in from a long session I noticed a few things:

1. The expansion chamber was nearly full and I was getting drip out from the overflow hose

2. The left radiator was cold and the right was crazy crazy hot

Thanks for any advice on where to start.....

sounds like you have a big air pocket.

when you fill the system loosen the bleeder on the top of the thermostat housing and the left radiator till you see coolant seeping from both as you fill.

Thanks - going to drain the system and refill from scratch.

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