Vintage Dirt Bike Q & A

I've wanted a vintage dirtbike for a while now and made a trade the other day so now I'm the proud owner of a Husky 250. The problem is that I can't figure out exactly what kind of bike it is.

Here's a pic of it.


It seems to have some parts off a MC 258 (Swedish military bike). The fuel tank and rear fender I'm pretty sure are off one of those, and the exhaust looks to be the same too but that might've been used on other models. The seller thought it was a MC258 but the frame doesn't match and the engine is a manual, not automatic. From what I've found I think the frame is a 1972 frame but I'm not sure, can't find a frame number on it anywhere.
The engine may or may not be original, I'm pretty sure the head doesn't match the cylinder because the cylinder has the 2 extra head studs (or holes for them) whereas the head has just 4 holes.


Can anyone help me identify the exact year and model of it?
I'm also interested to know what year the engine might be.

Thanks in advance! I'll run out and take some better pics if needed

Looks to me that it has a Mag swingarm and 125 wheels on it. The motor I have no idea.

I posted the same thread on a different forum. The engine is a Mag engine too (2033). So most likely it's a Mag with a bunch of parts replaced.