I have a gas gas. Recently de-coked the piston because of really bad pinking. So to do this I had to remove the radiator and all the hoses, but after riding it for the first time today, I noticed a few of the connections where leaking. Any ideas as to how I can get them to seal again??

If you put the original crimp type clips back on and they now leak I would suggest swapping them out for jubilee clips maybe.

yeah I used the original clips.

One or two of mine leaked after refitting them. I did try to crimp them a little tighter but ended up swapping for jubilee clips. Mines an 02 mind so they are a little worn I guess.

And if I'm honest although they don't look as neat and tidy as the originals I prefer jubilees cos I know exactly how tight they are after I fit them.

Jubilee clips is the only way to go