What kind of paint did you use and is it holding up? How many miles was on it when you took the pic?
I've painted cast iron V8 blocks and I think the FTR engine heat on that part probably doesn't require heat-resistant paint like the V8 block; I am concerned with what kind of paint would be compatible with the grey finish that Indian provides.
If you can believe it it's testers model paint, enamel and it holds up perfect. I did some drilling on a Honda exhaust and used it and it worked perfect. My neighbor paints all his bolts on his Harley engine with it with great results.