It looks like 42mm,aren't the av & avs the same bore?
Yes. Instead of checking through the exhaust port you might try rigging something up to check through the spark plug hole (or pull the cylinder if you're going to anyways). Top dead center to bottom dead center is the measurement you need.
If you need to replace the cylinder I'd ck MM's 024s Sleeper thread. Sounds like you need to pull cyl and ck things. You can on some saws measure stroke though the plug hole. I would recommend removing the coil as the magnet cause you grief near TDC. Just start at top or bottom and find a position for the caliper that can be duplicated then move the piston to the opposite end, no math on this one. Hope that helps. Those make a nice limbing and woodcutting saw.
My very rough measurement is 30mm for the stroke.,,I wore out my 011 and thought I'd move up to an 024,,I have an 034 also for bigger cuts.
Roll the crank over with the flywheel. The lowest point of the crank throw is bottom dead center so measure from the base where the cylinder sits to the top of the connecting rod. Then turn the crank 1/2 of a turn and you'll be at top dead center or the highest point of the crank throw. Measure again from the base to the top of the con rod. The difference between these two measurements is your stroke.
Yep. 32mm is the super which gives you the option to use an 026 top end if you want.
