I have a 2010 iron with 10k , stage 1 upgrades , wire tuck since 2010 . It started with first once in a while the speedometer will stop working while riding, then after that the bike all of sudden willn stall, turned it off for like 5 min and it started all ok and the speedometer working ok to. Now it has done it more often like maybe 3 times while riding and sometimes only the speedometer will stop working but the engine will keep running, and sometimes both will shut down . All ready check all fuses and any lose wires and nothing, Will highly appreciated for your guy's help in advance.

 

Similar problem with mine. Turned out it was the Crank position sensor. Located near the oil filter held in by a single bolt
Some folks had luck by removing it and cleaning it off. It's apparently magnetic and picks up shavings. Mine would go haywire once it warmed up. I noticed after I came to a stop on the interstate it would high idle for a bit. Also check your trouble codes there's a step by step instruction on here just look.

 

Do you remember how much was the sensor, and really appreciate the help