I just opened a NS12P and what I found is beyond ridiculous.

This is a mix and match puzzle from all their old engines.

At best, I'd say this engine is good for stadium trucks or as a rain engine, or if you want to run 10 minutes on a tank of fuel.

The crank has the smallest intake opening I've ever seen on an NR engine, not only the timing, but the port is so short, that when you look through the carb hole, half of the opening is blocked by the crank.

The counter weight on the crank is full circle like on the first MT12's and it'susing the long rod of the MT12.

If you look through the exhaust outlet, half the opening is blocked by the sleeve.

I'll try and mod this egine to where it's usable as an onraod engine, but I'm afraid, my Dremel won't be enough. I should probably get some dynamite to blast the holes to correct size....