I'm am no where near a side car expert but every one I've seen there is an adjuster on the leading attach bar. Don't know what it's called but it adjusts the "toe in" on the side car. You have to do by trial and error. Shorten that bar, test ride, shorten the bar, test ride etc... It's normal for the side car to pull right a little on accelleration and pull to the left on braking. That car should be made to track straight ahead in normal straight ahead riding at a constant throttle/speed.