I'm going to have to try to find one of those syringes but maybe this is a good time to explain the method I've been using.

I use a length of clear plastic tubing with a bore of about 1/16" (much the same as fuel tubing) and around a metre long or shorter for small engines. I calibrated it by filling to the 1 metre length then pouring it into a medicine glass (a calibrated syringe would be even more accurate though). I kept filling and pouring until I had 50cc in the medicine glass. Then I divided that 50cc by the number of times I had to pour in 1 metre of fuel and that gave a volume in the tubing of 2.564cc per metre or .02564cc per cm. It's easy enough to regulate the drips out of the tube (a finger blocking the open end) to at least 5mm which is near enough .01cc.

In use I fill the tube with more than enough to fill a combustion chamber and then measure the length of fuel against a steel rule down to the nearest mm. Then I start dripping the fuel into the combustion chamber until it's dead level with the edge of the squish band (this of course is with the head off ). Then remeasure the length of fuel remaining in the tubing and the difference is how much was poured in. This difference is then multiplied by the 2.564cc/metre to give the answer.

It's not necessary to do this with the head off (if you do then you have to calculate the volume of the squish clearance as well) and with some engines, particularly older baffled piston types, it has to be done with the head on and then it gets filled to the bottom thread of the plug hole. But you have to be certain the piston is at exact TDC.

I still want one of those syringes though..