I would have liked to see some pics of the Fire 11 sleeve.
Seems there is a descripancy about the exhaust port
configuration of these engines. The sleeves part number
is listed as being the same as the Rally 11. It is
described as being a single port exhaust. But you said
that the Fire 11 engines that you just modded had the
3 MES style exhaust port configuration.
Oh well, I guess I'll have to order one and pull it apart
to see for myself. ..........j/k ........