Honda-SOHC

Hi guys I'm experiencing vertical bumpyness on my front end of 77 cb550f2 at low speeds, Could it be the shorty after market front fender ? Don't have the original so went for this, I have Dunlop K70 tires 350 on the front, are they no good? Really just looking for others advice, the bike is fully loaded bags on the rack  with my girl as well. Doing a trip, rode from Toulouse to Girona yesterday. Everything else is smooth. I have tapered bearings kit to fit, All balls  checked spokes, axle clamps, they're not perfect, tiny gap. Will make sure it's at the back will check wheel bearings chain slack and rear swing arm brushes today..appreciate the help. Once sorted plan to continue along the med coast.
Happy riding folks