ORIGINAL: blw
You are trying to divide my interests here because I like both ASP and Evo engines. Okay, why isn't the NX a true .61?
I've got to admit that I have never had a lot of interest in this size 2 stroke engine.
I just read further down the forum and now realize that the OP already has the Evolution .61NX, so nix the ASP .61.
IIRC, Barry, the .61NX was built in a forty sized crankcase. That means that the induction path is not up to 10cc standards and the crankshaft induction pathway will be of a smaller diameter than an engine with a 15 or 17mm crankshaft. It's a great .40, but just not much of a .61. As I said, this is based upon my recollection of the details - which, of late, have been fuzzy to say the least.
Now, for the record, I'm planning on obtaining said Evolution .61NX myself. Just for kicks.
Ed Cregger