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Author Topic: CB750 K7 - front caliper piston replica  (Read 989 times)

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Offline Erny

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CB750 K7 - front caliper piston replica
« on: February 04, 2018, 03:19:29 pm »
Looking for new piston for my K7 - can you recommend this replica? http://4into1.com/front-brake-caliper-piston-45107-392-003-honda-cb750/

if not, any better tip?
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CB750K K7 USA model (1977)
CB550K1 USA model (1975)

Offline Erny

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Re: CB750 K7 - front caliper piston replica
« Reply #1 on: February 06, 2018, 07:45:54 am »
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CB750K K7 USA model (1977)
CB550K1 USA model (1975)

Offline Yamahawk

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Re: CB750 K7 - front caliper piston replica
« Reply #2 on: February 07, 2018, 04:52:51 am »
I think you should be good, any new piston will be better than an old, corroded one...
Charlie
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1971 CB750K1 (newest bike), 1996 Royal Enfield 500 Bullet (therapy bike), 1981 Yamaha XV920RH, 2006 Kawasaki Concours (retirement bike), 1975 Yamaha RD350 (race bike), 1989 Honda VTR250 Interceptor (race bike), 1986 Kawasaki EX250 Ninja (race bike in progress), 1985 Honda Elite CH250, 1973 Yamaha GT1 80cc, 1974 Yamaha DT360 project bike.

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Offline Erny

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Re: CB750 K7 - front caliper piston replica
« Reply #3 on: February 08, 2018, 07:52:31 am »
Related question to front brake - just receieved ordered EBC organic pads - does anybody know for what purpose is there that white (plastic?) ring?
There is nothing mentioed on package...

I did not have it in my stock pads I took off from bike - it is not shown in spare parts catalogue either.
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CB750K K7 USA model (1977)
CB550K1 USA model (1975)

Offline robvangulik

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Re: CB750 K7 - front caliper piston replica
« Reply #4 on: February 08, 2018, 08:40:00 am »
Compare no. 5 to the pic you posted an there's your answer...
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Offline Erny

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Re: CB750 K7 - front caliper piston replica
« Reply #5 on: February 08, 2018, 08:54:51 am »
Yes, but no. 5 is shown as 1 item, not 2 parts. And surely my pad (original) does not have it. So either someone before me lost it, or these EBC pads are in 2 parts and stock was just one?

Attached pic after disassembly of brake - no ring there
« Last Edit: February 08, 2018, 09:03:33 am by Erny »
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CB750K K7 USA model (1977)
CB550K1 USA model (1975)

Offline Erny

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Re: CB750 K7 - front caliper piston replica
« Reply #6 on: February 08, 2018, 09:05:34 am »
Looking on it again, it seems there was such ring in the past... Maybe that's the reason why brake was so weak???
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CB750K K7 USA model (1977)
CB550K1 USA model (1975)

Offline pjlogue

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Re: CB750 K7 - front caliper piston replica
« Reply #7 on: February 08, 2018, 09:56:49 am »
The ring is to help reduce chatter and squeal.  When you go to mount your new pucks be sure the pucks sit in the cavity loosely and don't bind at all.  Many of the aftermarket pads have the outer perimeter of the steel backing plate painted and it causes binding against the caliper housing.

-P.
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Offline Erny

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Re: CB750 K7 - front caliper piston replica
« Reply #8 on: February 08, 2018, 04:26:51 pm »
Thanks now it is clear
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CB750K K7 USA model (1977)
CB550K1 USA model (1975)
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