Nissin semi hydraulic front disc sticking

[Dragbart]

Just been out for a ride and very sluggish pulling away. Realised that front disc was partially on and wouldn't release. I've eased it back a bit in the garage but the wheel isn't spinning freely. Anybody had the same problem ideas?

[Wack]

Sounds like the caliper needs stripping as corrosion / dirt is not allowing the pistons to return.

[Dragbart]

Just been out to the garage, all cooled down and wheel spinning freely? I don't get it?

[missing lynx]

give the caliper a good clean with brake cleaner paying special attention to the pins it floats on than re asemble using copper grease

[Dragbart]

Is that a difficult job? I'm ok with most things, but not stripped a caliper before

[Wack]

Also check there is free play at the lever, if the cable is too tight it may not allow for fluid expansion when hot.

[drivera]

Unbolt the caliper from the backing plate take the pads out, then CAREFULLY pull the brake lever so as to push the caliper pistons out a bit ( around 5mm ) if there is a line of rust or crap on the pistons clean off with clean brake fluid ( don't use anything else ) you can use a cotton bud or something similar , then push the pistons back in by hand , clean the pins and lightly copper slip them then put the pads back in , reassemble then replace the fluid ( if more than a couple of years old ) with new fluid .
Hopefully that should sort the problem out

[Dragbart]

Thanks to you all for your help. Did the job an hour ago and just been for a start/stop 15 miles and no problems at all. Even temped me to open up my new Muggy 198 set up - wow!!