The MRA is a revolutionary new device which aids starting by retarding the timing on fixed-position magnetos, helping to turn the infamous kick-backs and spit-backs into starts. E-Z Install. When the cap-mounted lever is flipped, the points 'shift' 10 degrees, retarding your timing 20 degrees for starting. The lever is then locked in the advanced position by a rare-earth magnet. You'll love it! The complete kit consists of a new cap and neoprene gasket, a set of points, condenser, and the actuating pieces themselves. MRA-G is for reverse rotation (counter-clockwise, such as G5, YXS, Dual Mag Rear, Horizontal Nose Cone hunt); For most magnetos (such as H-D XLCH's), see MRA-R.
NOTE: Fits all Morris Housings, H-D, and all cast Fairbanks-Morse. Let us know if this is for a new-style billet magneto OTHER than a Morris.