A sharp tap square on the bolt head with a 1lb hammer for the ones that aren't rounded. If that doesn't work an electric heat gun to heat the alloy and possibly thread seal as well. I think that you need to get to about 120ºC to soften the blue thread seal. If necessary drill the head off the rounded bolt but I note that you called these Allen bolts. The originals are star drive Torx head bolts and it is easy to use one bit too small and think that you've got the correct sizeDAMHIK
Remember that any thread originally dry should have the torque setting reduced by ~25% if re-assembled with Alu-Slip or Copper-Slip.
Definitely Allen bolts but originals may have been replaced at some point.
Heat gun is on order so we'll see, hope for the best. Aware of the need to reduce torque, thanks anyway, assume nothing!
Todays puzzle - how to remove the footrest pivot pins? Split pin out, washer off, tap gently (front) until flush then tap one of the new ones in from the bottom to drive the old one out keeping the spring in place. Then tap new one in from the top. However can't get the old one to budge much past flush.
Rear won't move at all. Clymer just says remove pivot pins, so far as I can see. What am I missing?
Have to suspend operations until this evening, duty calls.
DAMHIK