As Kirby noted, gear drive cams are definitely not recommended on a stock Harley crank (flywheel assembly). While chain drives are a little more forgiving when it comes to cam drives, excessive runout of the pinion shaft also creates another even more important issue, and that is premature and abnormal oil pump wear. If you open up the cam chest you really should take the time to measure the pinion shaft runout. Yes, it is kind of like opening up a can of worms or Pandora's box, but it's better to know for sure than to just ride around wondering.
Harley oil pumps are made with excessive clearance to help them survive (for awhile anyway) excessive crank runout. Unfortunately that is one of the factors that leads to low efficency and low pressure at idle. One aftermarket oil pump supplier used to have a warning in the literature for their higher output pumps that basically said installation in a bike with more than .002" runout would void any warranty and was not recommended. I'm not sure if such warnings are still used, but this does illustrate the point I'm making.
JMHO - Jerry