1977 CB750F rear caliper

[Loki]

So next bit that came to hand in my latest project was the rear brake caliper. So first thing is the bleed nipple won't seal to pressurise the caliper to get the pistons out so blanked it off with an M8 allen screw with thread tape, sealant and a fibre washer, so far seems to be airtight, tried with airline but nothing moved so have ordered a grease nipple M10 x 1.25 thread then will try pumping grease in to force them out.
Been scouring the interweb for a better replacement but no luck so far for the 2 piston caliper unique to the Super Sport? is the same caliper fitted anywhere else? or is there an alternative?

 

[hinksy]

While you are waiting for the grease nipple , soke the caliper /pistons in penetrant . They could be very badly corroded and might need some help unsticking . I think the cbx 1000 , gl 1000 and cx 500`s of the similar years had the same brakes . I did mine a while back and they were very hard to get the pistons out aswell as the masters

 

[Loki]

Got the grease nipples today so have now extracted both pistons which are both scrap due to rust pitting, the bores cleaned up good but I still have a leaking bleed nipple, cleaned the pistons up to do a pressure test and the nipple is leaking badly, I have a used caliper coming but can see that the bleed nipple is sheared so I think I may pack it off to one of the specialists to get it sorted, there are a few that advertise don't know if anyone has any recommendations, UK only please.

Loki

 

[Loki]

Drilled and tapped M10 x 1.0 and fitted bleed nipple insert so all good now, reassembled with new pistons and gave it a coat of black smoothrite, looks brand new now.

Loki

 

[hinksy]

This just came up on the Honda CB750 Supersport bookface page . CB750 SS rear brake caliper $95 plus shipping anywhere in the world! PayPal goods and services are accepted. Or pick up in Fresno,Ca and as always thanks for looking.

 

[Loki]

Cheers mate but makes it a very expensive spring.

Loki