We need a lot more information before we can help me old China.
What exactly did you check on the engine?
Compression?
Did you have the heads off?
Checked the battery?
Is there a spark?
Is there fuel in the carbs?
Are the jets blocked?
Does the engine turn over?
Answer that lot and we can get a better picture!
_________________
MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball