Originally Posted by williame3590
I thought these were quite rare but I have seen 3 for sale in the last month.
Nice and interesting MAGNUM.91 that You have!
seems like they have been made in different production runs over a period of time. As i remember they started as MAGNUM with black cyl.head and fins with some minor changes during production, later on they were distributed under the name POWERMAX with alu-color cyl.head, black cyl.fins and powermax 91 inscription no longer on the cranckcase. Last production run that i am aware of was under te name HI-MAX with blue or red anodised cyl. head and black cyl.fins, distributed mainly in the US by HobbyLobby i think. There also was a MAGNUM V-Twin and a 3cyl.radial made in small production (will post some pictures of the V-twin and 3cyl. later on)