Stripped the front brakes as they were binding. Pistons out and cleaned, seals out, cleaned lubed and everything replaced. It was all in pretty good condition. Everything back according to the service manual. Even bleed nipple sealed with Teflon tape. Bled in the order shown in manual using a vacuum. Single front piston for rear brake working fine. However I can get absolutely no compression on the front lever. I have gone through a litre of fluid trying to bleed the system, it seems to just pull the fluid from the master through the hoses and straight out the bleed nipples For the two fronts, as I said the linked back brake piston seems to be fine and I have good compression. I have tried everything including re stripping. Tried leaving the brake lever on all night and still nothing. The fluid is completely clear so it’s all new stuff coming through. I can only assume that a fault has occurred in the master cylinder. No air bubbles coming out of the master cylinder. Either something has broken in the cylinder mechanism or something has got stuck, however, if something got stuck surely there would be a little bit of resistance on the lever but nothing at all. I have got no leaks anywhere in the system. I know the calipers are in good shape as I used a compressor air line to pop the pistons out. I have ordered a master cylinder repair kit in case that may help. Am I missing a trick here, is there another bleed nipple that I don’t know about? I have spent three days trying to sort this. Never had any issues doing brakes in the past on other bikes.