440ex compression

[KingKash420]

is there anyway to find out my compressesion ratio on my 440ex, i bought the quad with the motor already in it and have no idea what piston is in there

do most 440ex quads have the same compression?

any help is appreciated

[nakomis0]

Do a compression test. They have testers that screw in the spark plug hole. And not all 440s have the same compression.

[KingKash420]

no i dont want to know the compression of the cylinder i want to know my compression ratio

[cals400ex]

yep, put it at tdc and put oil in the spark plug hole. add it up to the bottom of the hole. measure how much you put in.