This is the way life is...sometimes looks like our brain get stuck in the sand or something...we just cant think. If you guys remember, i was having an engine problem once i installed a set of cams and a high compression piston. Some guys advised me about a timing problem and others went for a carb problem. Well...i found the [@#$%&!]...the engine failure was caused by a new spark plug ...yes...when i re-assembled the engine i installed one of those iridium plugs. It happens that the plug failled when the engine reached the operation temperature, dont know exactly why but i have one theory but it doesnt matter right now. I installed my 1 year old OEM spark plug and the engine runs like a champ, never showed any kind of hesitation...i`m a happy guy now.