Give it the Farmer Jones treatment.
1. Open the muffler outlet and remove the screen.
2. Widen the intake and exhaust ports, but don’t grind on the top or bottom.
3. Set your squish to 0.020-0.025”. You may be able to simply Delete the cylinder gasket. Some saws are too tight with it missing, so a thinner gasket must be made. Most OEM base gaskets are 0.016-.020” thick. A minilla folder is usually 0.010”. The wall of a beer can is usually around 0.005”.
Even to do these simple steps I recommend some research (tons of threads on here and elsewhere), a pair of calipers, 0.032” solder, a dremel and some carbide burrs.
Bear in mind that you’re wanting to go McGiver on you $900 chainsaw. Spending $25 extra on a timing wheel is a good idea. If you don’t have patience and concentration you’re not likely to be happy with the end product. Take your time and your saw will be way better.
Best of luck!