Trials madness

Does the 04 model have the plastic bit you say is missing

My tensioner is set this far off swing arm.

Mine is as follows

New txt as a guide over the frame

Lol obviously but when bike leaves the ground and wheels turns chain makes horrible noise. Been looking to see if the frame should have a chain guide on it so far not looking like should. The later ones have I seen on Google images just struggling to find a picture of a bike my year around the sprocket. like now on stand turn back wheel chain rattles on frame realy loud this could be normal an I'm being paranoid. I would of thought the tensioner should keep it lifted off frame.as mentioned completely new to me.

Is it because am spinning the wheel with no weight on the bike.what's the bit of rubber I'm missing I've taken a pic of the chain over the frame at the bottom.

Hi people new to the trials world had a bike a few mnths now been on a two times since owned.only short rides. What I've noticed is when pushing the bike or no weight on the bike the chain rattles on the frame underneith the front sprocket. Is this normal? Setting the chain I have the bike raised off the floor swing arm at lowest.both nuts on rear wheel undone.turn the adjusters so marks are same both side and have the tensioner about a thumbs space away from swing arm.lower the bike down push it and the chain rattles