Bad starter?

[PepNYC]

So I've been having a weird problem lately with my 1993 xj600. Here's the details in a nutshell. When I start the bike the positive post on the battery gets really hot. If it's a cold day and the bike hasn't been started for a while I need crank it for a bit then it kills the battery quick. Seems like the starter is draining the batt. It's a brand new battery and once I charge it back up is fine. Batt load test and charging system both good also so all good there. I checked the cables to see if they were grounding or shorting any place but found nothing. I was told it could be high resistance in the starter causing the draw issue. Now I rebuilt this starter about a year ago. Brushes, seals, etc but I'm still convinced it's something with the starter causing it but I'm not sure how to test it. Maybe bad windings or something? Anyone know how I could test it with a multimeter? That's all I have.