looks quite good........A couple of issues that are something of note........ I don't believe that the standard primary cover will simply fit, not without some kind of spacer. For me that is not desirable........the problem is the front pulley flanges are so big, that the cover wont go on easily.........I've had this discussion with the Godet boys as to why they don't run a belt primary......... i think that was their main problem, so they stuck with a chain drive..........nothing wrong with that, only then the starter runs in the oil bath to lube the chain, and this is something most automotive starters are not sealed to do. They have come up with a revised starter system that does away completely with the stock ESA, it then uses a specially made chain wheel that has a cush drive in its hub, thus overcoming the massive shock loads that are present when you hit the starter button.......... i would say the idler used above is there because the double tooth belt is probably only available in certain lengths perhaps........All starter options are worth looking at, unfortunately starting any large sized V twin is expecting a big ask from any starter system, the double shock loads on cranking is just like starting a massive single.........a real struggle........as harley's have been suffering for years. From my experience starting a larger Vincent engine with any type of big compression and big cams, it is an absolute must to have some kind of decompressor system built into the engine to assist on starting........without this any starter will really struggle and will ultimately fail........