Quote Originally Posted by sina518
some kind of ticking noise on a 2003 raptor 660 maybe valve adjustment but idk, it runs fine
that would be valves.But what would cause this could be running to low of octane fuel.on top of that u might be ready for a new rebuild

I no my 400ex bored 40 over started ticking when i was running anything under 105 octane but it kept doing it with higher octane when it was ready for a new build