I made a really simple tool to both measure and adjust the level of fork oil. It's just a piece of brass tubing, some vinyl hose, and a syringe. You measure out the air gap at the top of the fork tube specified in the manual, and mark that on the brass tube (starting at the end that you're going to you stick into the fork tube). You attach the syringe and the vinyl tubing to the brass tube. You stick the brass tube into the fork tube, and line up the mark on the brass tube that you made for the air gap measurement with the top of the fork tube (or with whatever point the manual tells you to measure the air gap from). Then you just draw on the syringe. The vacuum will suck out any fork oil that's above the level of the air gap, so the proper air gap will be created. You don't need to read any measurements, or even be able to see the fork oil, as long as you can line up the reference point on the brass tube with the proper point on the fork tube. If you draw air when you pull on the syringe, then you know the fork oil level is too low, and you add more. If you add too much, you'll draw the excess oil off when you pull on the syringe, and it will automatically set the oil level at the right spot.
Sorry MAZ4ME, I didn't mean to steal your thunder. I typed my response before I read yours.
"No matter where you go, there you are."
Last edited by RCinNC; 07-14-2018 at 11:49 AM.