help and advise with an NC30 rear Hub.

[jacknell]

Took the rear hub out the other day to grease the hub bearings and replace a worn rear disc. Any way i reasembled it today with another secondhand disc and found that the disc seemed warpped (not side to side but up and down)?

I put the other disc back on and it still was the same. By spining the back wheel and whatching the disc through the rear caliper it looked un true.

Can somone check there Nc30 to see if its the same...

Iam wondering if i have re assembled the hub wrong or is this normal. To me on close inspection it looks as though the hub could be out of line..... Very strange.

Any help or input with this problem will be a big help.

[Dynamohum]

strange one indeed , cages in bearings ok and hub nut torqued up with bearing spacer in place between sprocket carrier and n/s bearing also is caliper mount circlip seated correctly

[jacknell]

Spacers all there including the extra rick oliver on that spaces the sprocket out 5mm for the 750 rear wheel conversion.

The hub spins fine, but the hub or disc seem out as you can visually see the disc moving up and down when gauged of the rear calipar.

[Dynamohum]

shaft not running true was it one from a breakers possiblly been taken from a bike involved in a heavy rear end shunt to rear wheel might be best to strip it again and get the flange and shaft checked if all the rest in good order.

[jacknell]

Was in when i got the bike. But never felt the need to check it. It would take a heavy shunt to bend on of those mind. Its almost as if the disc hole mounts are out.

got to be some thing simple

[Delboy]

If all youve done is take it apart and changed the rear disc, then it must be something amiss in the re-assembly