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I have a Late G15CS and a Ranger. Both are stamped the same way on both the engine and frame - the 1 looks like this 1 in this font. I think this frame was stamped to match a '68 Commando engine, for which a PO probably had a title.Commando motor would fit in a P11 frame, but wouldn't be balanced for rigid mount. Transmission and primary would need to be Matchless items, too - lugs on a Norton tranny are different than the P11 and G15. Also the engine is shimmed to the timing side and the tranny to the drive side to align the drive chain with the rear wheel. Both hybrid frames were designed for AMC motors, so shimming was needed to get the sprockets all in line.Also, because the Ranger was built after the '68 Commando, Rangers have Commando head castings - except the side oil holes for rocker lubrication are not drilled and tapped. The oiling is still done, Atlas style, on the top of the head.
I have a Late G15CS and a Ranger. Both are stamped the same way on both the engine and frame - the 1 looks like this 1 in this font. I think this frame was stamped to match a '68 Commando engine, for which a PO probably had a title.
Commando motor would fit in a P11 frame, but wouldn't be balanced for rigid mount. Transmission and primary would need to be Matchless items, too - lugs on a Norton tranny are different than the P11 and G15. Also the engine is shimmed to the timing side and the tranny to the drive side to align the drive chain with the rear wheel. Both hybrid frames were designed for AMC motors, so shimming was needed to get the sprockets all in line.
Also, because the Ranger was built after the '68 Commando, Rangers have Commando head castings - except the side oil holes for rocker lubrication are not drilled and tapped. The oiling is still done, Atlas style, on the top of the head.
