Is there a difference between the 98 and 02 srx carbs? I have a set of 98 carbs here. I lifted off the cap, lifted the throttle, expecting to see two allen screws at the bottom, but no, I cannot find any in there, nor threads for them. All I see is 2 depressions where they are supposed to be? I cannot see how you can get to the needle on this carb. Will someone explain it to me? Preferably in pictures and text