Front disk brake

[Paul perks]

Hi all i have a nissin disk brake on the front of my lammy it is draging does any one have any idea if you can set it up it does have two screws on the side of the calliper but i am not sure what they are for. All help appreciated

[soulsurfer]

You may need to file a little off the lever where it pushes the piston/plunger on the master cylinder so there's room for heat expansion.

[byron]

all discs will drag a little
the pads should be self-adjusting
are the pistons smooth to retract enough
do the pads slide freely on the pins ?
is it even on a revolution ?
sure the disc is true ?

the screws on the caliper cover the pad pins

[storkfoot]

^ agree with both above. When I last had this, I had to replace the seals in the caliper but it could indeed be the lever, or a wharped disc.

[wack 63]

I have found that sometimes washers are needed between the caliper and the stainless plate bolts to space the fixed pad away from the disc a tad,also the lever may need a bit filing off where it pushes the master cylinder piston although this is more noticable when the fluid is hot.

[soulsurfer]

this is more noticable when the fluid is hot.

I thought this was due to heat in the caliper pistons under use and pads rubbing causing expansion not fluid getting hot

[Paul perks]

Thanks all i will take info on board and rectify problem many thanks