The reason for gear drive cams was to eliminate the manual cam chain tensioner which needs adjustment as the shoe wears down, the shoe also wears out in 20,000 to 30,000 miles and if the shoe falls apart particles will go into the engine oil and cause problems.
Since HD came out with the hydraulic cam chain adjusters there is no need to adjust the cam chain tensioner and the shoes last longer.
Upgrading to the new cam plate is a better option because you also get the high volume oil pump which will give the engine better lubrication. The cost between gears and the cam plate upgrade should be around the same.
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08 FLTR candy red sunglo,with 2015 103 HO, V&H Dresser Duals with Monster Rounds, Power Vision tuner, Willy Shiny Wheels and Forks and a bunch of other stuff.