XJ600 (pre-diversion) brake discs compatibility

[snodge182]

Hi guys!
Just a quick post asking if anyone knows if any other brake discs from other bikes is compatible with an XJ600 pre-diversion (the bike is a J reg 1991)
It failed its MOT yesterday on a slightly warped front left brake disc and I need to get a replacement one for a very low price.
Thanks!

[chris-red]

Remove warped disc and caliper. MoT sorted.

Don't buy cheap brake discs, don't just replace one.
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Well, you know what they say. If you want to save the world, you have to push a few old ladies down the stairs.
Skudd:- Perhaps she just thinks you are a window licker and is being nice just in case she becomes another Jill Dando.
WANTED:- Fujinon (Fuji) M42 (Screw on) lenses, let me know if you have anything.

[Fizzer Thou]

Pattern discs are £75 on https://www.wemoto.com/bikes/yamaha/xj_600/91-92/

To double check the disc runout,draw a wavy line on the swept area of the disc using a dark coloured white board marker pen (black works best) then turn the front wheel without applying the brakes.If all of the marker is wiped off,then it may well be that the pistons in the caliper are not moving back into the caliper when the brake lever is released.If some of the marker is removed by the pad removing it,then it will show the highs and lows of the surface of the disc.

Some people say that the disc can be skimmed.But if the thickness of the disc is already on the borderline of the service limit specified in the manual,then it is better to replace them as a pair.This is worth doing if you intend to keep the bike
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Just talk bikes.What else is there?

Always have a 'Plan B'

[Snod Blatter]

https://www.allbikeengineering.co.uk/fitment_guides/fitment_guide_20141101.pdf

Yours looks to be disc 2541, plenty of bikes sharing the same
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1994 CB250, 1984 CBX250RS-E, 1989 K100RS, 1995 TRX850, 2016 Z250SL