Your kart maybe over stuck and dragging your rpm’s down or you’re using the wrong gear ratio. Other areas to look at is front and rear tire widths, tire pressures, caster, toe and weight placement. Sorry, nothing is easy.
Try calling Top kart in Indianapolis. And try asking your competitors. If you’re truly a newbie, you should get help. Most information will apply across many different types of chassis, but you seek out someone with another Top Kart.
LAD Specialties customer / tony kart / rotax / kt100