Post 2000.5 DS slow speeds - how to increase

[Jbierschwale]

Greetings! I am working on a friends’ post 2000.5 Club Car DS. The cart is in very good shape, with new batteries and cables. The batteries are 6x8v US Batteries US8VGC. Cables between batteries are 4ga, but the +/- cables going to the controller appear to be 6 or 8ga. I have not pulled the rear cover to check the motor or controller yet. The cart has very good torque - enough to spin the tires in forward or reverse in my shop, but quickly tops out at 12mph on a slight decline, and 10mph going up the same slight incline. How do I go about increasing the speed on this cart? Surely it’s throttled. I have read about speed codes, but I assume that only applies to post 2004 models with the IQ system. Anybody got some pointers for me? He only uses this cart to check the mail or tool around his property. It has 205/50-10 tires on all corners. Thanks for any help you can offer!