"As I said 100 times before nothing really "flows" through the transfers"
Please excuse my ignorance Lozza, I haven't taken the time to read your previous 100 posts on this subject. Despite searching for previous posts on this subject to the best of my ability, I found nothing. That's why I asked the question.
If it does not flow through the transfers, how does it move through the ports to the combustion chamber? Teleport?
Tony.
Its a 2T engine if something seems logical it's the least likely thing to happen. I say "nothing flows through the transfers" because its a multi step process for intake charge to go from carburetor to combustion chamber. First in into the crank case where it stays for a few cycles, then under the transfer ducts, then into the transfer ducts, then finaly into the combustion chamber. It is not a 1 step process, which is why altering the piston to match the cylinder spigot will make no difference.
Hmmmm.........
It seems I didn't explain my question clearly enough, thank you Lozza for the photo that perfectly demonstrates the result that I was asking about!
The areas I've highlighted (in yellow) are the areas of interest to me, I won't touch the reinforcing ribs but this skirt effectively reduces the size of the transfer port from left to right, the area directly below the piston pin (gudgeon) is to be left alone. Not all of the material can be removed but some major improvements could be made in this area. I believe the sleeve/cylinder was designed this way for a reason, if it made no difference, why would Husqvarna cut the sleeve in such a specific shape?
Bottom line, if it makes no difference......who cares? It isn't going to do any harm.
But........if it's good enough for 53 RWHP on a 125, it's good enough for this old bugger!
Your thinking in a static sense, the crankcase on a two stroke is not a static environment. The crank is spinning and the piston is going up and down through the centre of all that is the rod. The intake charge takes a series of small steps toward the combustion chamber. Logs or rocks in a river don't stop the river flowing. The most important aspect of a 2 stoke is what happens to the intake streams once they come
out of the transfer ports. Grinding the piston away won't amount to any improvements. Improvements come mainly from outside the engine pipe, ignition and jetting.
Only Husqvana knows why they did that, even then its down to who is ever sitting in the chair at the time.
.............and Wossners are still as shit as ever
