you need to focus on certain things before you worry about speed or comparing it.
when the quad sits with the petcock on, it shouldn't leak any fuel out the carbs. once you get that fixed. change the spark plugs out, and make sure they are gapped correctly.
Then do what is called a plug chop. fire it up, run it through the gears wide open, then kill the ignition. pull the plugs before firing it back up and look at the ring. Instructions ar eon this site on how to do a plug chop. this helps with jetting. Once you are jetted right, then worry about any speed factors.