hi...i'm having this novarossi s5 for about at least 50 hours of run time already....the last time i ran it was in a 45 min main and still goin strong with no overheating or whatever.

well..just got the feeling its a bit "old" and need to be sure the next race in future i'm havin a reliable engine......so i need your guys advice or comment whether to just replace piston/sleeve or get a new engine.... thanks