Hey folks, looking for a bit of advice on what might be causing this issue. I recently stripped and rebuilt my front (tokico) 4 pot calipers with new seals. In trying to remove the pistons (lots were stuck!) I managed to get a few teeth marks on the top edge of the piston from pulling them out with grips. I polished and Sanded the marks with wet and dry and got rid of any sharp bits that could tear the seals. Refitted them on the bike and bled the system. The lever builds pressure (but doesn't feel great), but after letting go for a few seconds, the next pull sees the lever going straight to the bar with zero pressure. I've got some stainless lines on the way that I'm going to fit, and if that doesn't solve the issue, then I'm thinking it could be the master cylinder needing new seals. Is it possible that there's still just air in the system? I'm bleeding manually with a tube with a one way valve on the end. All bubbles seem to disappear but the brakes are still giving me problems. Would love some advice! Thanks Michael ---- 2008 Bandit 1250