I have had my SH stage II going for about 5 hours intermittently since the sleeve installation.I get it warmed up and run at different speeds. I have rechecked valve clearance. Checked headblots again with torque wrench. And changed oil and filter. Also added anti freeze. Friday I put it in the field raking for 2 1/2 hours temp only goes to 170-175'. but now I see weeping at the rear seam on the radiator tank. I look close and the solder appears to be cracked. no spray but just weeping. I have drained coolant down and tried to resolder. here's the question??? If my repairs does not hold are there any shops that you can send radiator to to be cleaned and repaired that will accept shipments and reshipback to you. There are no shops within 60 miles of me in northern VA.