Q:I've put new pads in my brakes, but the lever still comes back to the bar?!
A: the pads are responsible for creating friction against the disc that slows you down, NOT for applying the pressure that enables them to do this. The likelihood is that there is air in your brake fluid, or one or more of your caliper pistons is stuck.
Q: I've fitted braided lines/a new master cylinder to my bike but my brakes still feel spongy!?
A: The likelihood is that there is air in your brake fluid, or one or more of your caliper pistons is stuck.
Q: I had my calipers rebuilt not long ago, but they seem as bad as they were before....
A: The original calipers on many bikes are made by Tokico, as a general rule, we have found that once they have perished to the point of pushing the seals out or suffering sticky pistons, they are very likely to do it again in very little time. This is normally due to the lack of sufficient corrosion proofing in the grooves that hold the seals, the alloy oxidises creating aluminium oxide (white powder gunk) that pushes on the seals trapping the pistons. Equally, the distance between the piston edge and caliper is relatively large (by comparison to the Nissin's) this can lead to the pistons moving off centre and getting stuck.
It is for this reason that we offer the Nissin Upgrades, they last for years and years without major overhaul, and maintain solid, firm and confident braking.
(we do of course recommend regular cleaning of ALL caliper types to ensure correct functionality - these are your brakes after all!)