I've never had to add a spacer that I recall on any 650 ones I've done.

Sure you've got the right advancer?

Apparently others are experiencing the same issue Keith.
Something broken?

Twin 38's will give you 42% increase in piston surface area over single 43.
650/750 and smaller would be 38's

He posted this on another Z1 group on fb.

Tried using user name "arcot1751" and email in previous post.

Profile link.
https://www.facebook.com/david.wallis.9028

Can mods check member requests please.
Dave Wallis is having trouble joining up.
His email is
david.helenwallis@btinternet.com.

Or go 38 left and right. Don't think you'd notice much difference unless your going single to twin then it'd be an improvement over single 43.

Not quite the same, don't know which model it's from, but available if any good.

Pretty sure I have one. I'll check tomorrow

Like this?

I've 2 right hand behind leg 38mm piston but no 43mm.

I got a couple of elr ones from Cradley heath kawasaki last year.

Simonic wrote: If you are ever thinking of selling your seat please give me a prod. Cheers mate

Original 2:4 Not for sale.

I've got several 650/900/1000 calipers in various states. I think the 1000 has 44mm pistons and the 650 has 38mm. I'll have look and see if I have what your after.
If you get down to nw Kent your welcome for a cuppa and browse.

In my experience the blast media to remove Chrome needs to be pretty abrasive and wont leave a great finish for powder coat. I wanted a set of red springs on an old set of period girlings and was advised by the coaters to plastic coat straight over the chrome after smoothing any rust spots. Not bein...