[PAUL K]

Originally Posted by RBAILEY

My last Iron Dport combination met its demise due to a broken factory 455 N crankshaft that broke at the 1/2 rod throw arm the same exact way another is pictured in this thread.

The crankshaft let go after I had been cruising a sustained 2600 rpm on the freeway for 20 minutes or so.

An interesting thing that happened within 6 months prior to the crankshaft breaking; and I'd be interested to hear you guys' thoughts on this as to whether it may be an indicator there was an issue with the crankshaft

Many of you may have seen or experienced an OEM crankshaft accessory pulley (damper pulley) crack and break off of the damper while leaving the flat mounting portion of the pulley still bolted to the damper. I had this happen twice within a 6 month period and in as many months later the crankshaft broke while cruising on the freeway.

That's an interesting story. .. Did your crank pulleys have the factory support plate in place when they broke?

Do you recall if the balancer bolt was still tight after the crank failed?