How do you get past the dragon in Chapter 7, part 2, mission 1?

Interested to know too...
Stuck in the same!!
Thanks

You have to break the chains. I have been able to break the left chain using the goblin and ron and the deluminator, but I can't figure out the right one with the bike and bell, I get killed every time. To do the left one, you need to be the gobling and lower the light, then Ron to get the light, then goblin again to lower the light for the chain, then Ron to luminate, the light goes up and get's the snare out of the way, then you can use the leviosa spell for that side. No clue on the right, I rode around a while and rang that bell, but never saw anything happen, you do need to go behind the dragon, not in front. Good luck.

Ring the bike bell in front of the dragon till he hides his face with his wing... Then go to the right and follow the gems hich lead you to a opening in the wall... Good luck

I had the same problem and was stuck for ages. However I looked around on the internet and found that this problem is some sort of gilth so when you make the little bike and then switch the lights on the left side using the deluminator, if you switch lights against or even let the dragon blow you up you have to resart this level again. Anyway this is what you need to do step on the little brown stone so the bulb crashes down then move the two piece's by the bike then make the bike, go right up to the dragon ring the bell on the bike so the dragon covers it's ears. While it's doing that follow the studs that appear into the side room. First take the light from the lamp near the entrance then do the rest of the stuff in the room, when has filled up with tresure jump aroung to the cup send the light you took ealier into the lamp in front of you,then slide back down to the entrance.(REMEMBER IF YOU REJIGHT ANY LAMPS AGAIN OR MESS WITH THE LAMPS IN THE DRAGON CHAMBER ON THE LEFT SIDE YOU WILL HAVE START AGAIN) exit this room and go back into the dragon chamber , when entering the dragon chamber you should be shown the chest on the right side turn into hammer piece's, go back to the bike and scare the dragon again then go to the hammer and put it together levitate it to smash the lock on the chain then jump right next to the chain so it looks like your hangin of it the you should get the option to move the pins at the top of the chain the chain will then come lose. Get back on the bike it shouldent matter if the bike gets blown up now but be carefull that you don't,scare dragon move pins on left side dragon should now escape( try doing the chain whilst holding the cup remember you can't ride the bike whilst holding the cup)

Hope this helps.