Goodmorning friends. Have a 92 ultra classic tour glide with troag motor trike kit. When going over overpasses on highway or going over bumps on certain roads where forks fully extend im getting a hard knock. Had it in last year to have oil and air seals replaced as well as fork tubes because one tube was bent when I got it. Dealer said everything they did was right with forks. Could it possibly be motor mounts? motor possibly hitting top of frame?