I have a similar problem that I have not fixed, however if I turn the machine on with the joystick "due east" (centered at the right) the skater is facing the right way throughout gameplay... if its in any other position he is off by that much...
A while back I got a XYBots for about 100 on ebay. I bid on it because I already had something going to be shipped NAVL from the same seller...so why not ship 2 games intead of one... got my Blasteroids for $200 the same way...and a Viper for $100 the same way... although I think I overpaid for...
I am getting some odd problems with a system 1 cabinet. Everything works properly except for the video. Parts of the video work OK and other parts don't, doesn't matter which game cartridge is put in.
I've got some examples from Road Runner, and have also gotten similar issues with a Road...