The RGU had the 103 engine and the RG had the 96 engine in 2011.
The problem is the compensator sprocket and it needs to be upgraded, you do not need a new starter and you don't need compression releases.
My 08 has the 103 big bore kit just like your bike has and I use the stock heads and I don't have any compression releases and the bike starts just fine.
Just replace the compensator and you will be fine.
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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.