early hub

[needaz1100r]

Help sorting a quandary,

I have a front wheel hub, it appears to be an early black one and the reliable source (Grubby from MTC Reading) clearly remembers it coming from a crashed Z1-A.

BUT, it has a 4 bolt disc, not 6.

Is there a cross-over? Were Z1-B hubs 6 or 4 bolt?

Incidentally, I haven't yet removed the disc to see if maybe it was re-drilled for a 4 bolt disc?? I will do that tomorrow.

[Philippe]

Hi needaz1100r
all the Z1, Z1A and Z1B front wheel hubs had a 6 bolt disc. The 6 bolt hubs are larger in diameter than the 4 bolt hubs.
To my knowledge there were no 4 bolt hubs in those days (73 -74 - 75) for the Z1A.
Perhaps it wasn't the original hub in that Z1A .
GrtZ
Philippe

[needaz1100r]

Thanks Phillippe

I knew about the Z1A and Z1. I've never been up close and personal with a Z1-B so just wanted to be sure.

Yours would seem to be the only logical explanation.

Are you located far from Raalte?

[Philippe]

Hi needaz1100r
I live in Belgium, in the south of the province of East Flanders, in a small village: Lierde.
If you want pictures of the hubs, just let me know.
GrtZ
Philippe

[ADRIAN H]

Some Kawasaki H1 had 4 hole front hubs.

[z1bman]

the kh500a8 & z900a4 where the first models to have a 4 bolt hole hub but they where bare aluminium not black

[needaz1100r]

280mm disc, original black finish, M8 boltsx4, 9K date code ie 1974.

I am thinking Adrain's H1 suggestion may be correct.

Would appreciate any input,

Thanks,

[8 Valve Mark]

your date ties up with june/ july 74 mark..i have a similar disc in the store OT nov75. kh400 possibly? it measures 278mm. do you you need 6 bolt discs? m

[needaz1100r]

your date ties up with june/ july 74 mark..i have a similar disc in the store OT nov75. kh400 possibly? it measures 278mm. do you you need 6 bolt discs? m

I think S3, effectively KH400.

Thanks Mark, but this is just in my old stock, I can sell it now I know what it is.

Don't need a 6 bolt disc, but good to know you have one.

[8 Valve Mark]

that's a good twin disc upgrade for the right person. m (I've got more 6 bolt discs than I'll ever need mark, gotta have a clear-out soon. ...

[needaz1100r]

that's a good twin disc upgrade for the right person. m (I've got more 6 bolt discs than I'll ever need mark, gotta have a clear-out soon. ...

Looks like I am picking up another Z1 project at the weekend, so I'll be in touch...