I would say its time for a new set of rings if not a complete top end job. Even at a 110 that would be low enough copression that I would at least trear her down and inspect it. If you had a base gasket leak she would of leaned out and blown up. If you would of had a leak in the head gasket it would of smoked a sweat smelling white smoke, and I have never heard of a head cracking. Wiseco recomends that you replace your rings every 100 hour of rideing. I bet they are just worn, and when they warm up it just increases the blow by.