If you have an old MAC .45 engine a lot of parts will fit that from the A/A .45 engine. Like piston and liner, intake system and crankshaft. But do note - the crank-pin is different in size together with its bushed con-rod.
- The bore/stroke is the same as an MAC .45 (that would mean 21.2 mm bore and 21.1 mm stroke)
- Exhaust port timing: 185 deg
- Transfer/boost port timing: 132 deg (26.5 deg blow-down)
The A/A .45 will be sold in the US for $400 by Al Hobbs.
![](http://4.bp.blogspot.com/_1EKtN-2yN0w/S7M6cZHVsoI/AAAAAAAADTo/iM9oAG9tOew/s400/AA-45.jpg)
![](http://4.bp.blogspot.com/_1EKtN-2yN0w/S7M6Y7CnEfI/AAAAAAAADTg/CDH94llLkpQ/s400/AA-45-parts.jpg)
![](http://3.bp.blogspot.com/_1EKtN-2yN0w/S7M6VJsVjJI/AAAAAAAADTY/L9FavHHwhq8/s400/AA-45-PL.jpg)
![](http://3.bp.blogspot.com/_1EKtN-2yN0w/S7M6O426h7I/AAAAAAAADTQ/VU5Jo42YjYk/s400/AA-45-b.jpg)
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