The metal coolant housing and line attached to the rear cylinder on my bike is seeping coolant. It only seems to do this when not in use. I can go out and start the bike up and when it warms up the seeping stops,but let it get cool again and the coolant starts coming out again. I've tighten the housing bolts, and the hose clamp is no where close to the leak so that eliminates the clamp. The coolant leak is approximately 1-2 tablespoons in a weeks time. Is there an O-ring or gasket on that housing. Any info would really be helpful,thanks.