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What's the min. thickness for 1990 NA front Disc's ?

What's the thickness of the NA8 front disc's..... are they the same as the NA6 ? They are 255 mm right ?

Any help greatly appreciated.

Thanks

na8/nb8a are 255mm, na6 are smaller.
min thickness for the 255mm should be 20mm... i think.

the figure should be casted onto the disc, around the hub area on the inner side

So I can use 255mm disc's which are 21 mm thick ?

Thanks

yup, I had mine machined down to 19mm

So.... what happens if I just run then at 21 mm thick ?

Is there any problems with that ?

Thanks

nope, once you hit 20mm, i'd be looking at buying new rotors, they are at a higher risk of cracking/overheating

So leave them as is ?

Thanks

depends on how hard your driving and what pads your running, but once you get them machined and hit 20mm then replace them..

machine them to what thickness?

20.5 mm ?

Thanks

Here's some disk info to assist.

the machinist should be machining to whatever thickness is needed for a smooth consistent surface.

well, there ya go min thickness 18mm

must have my stock disc @ 17mm or something then LOL

btw, if your disc are 21mm, then they sound brand new!!