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Caliper swap from 79 to 81 ?

Posted: Tue Sep 01, 2020 7:01 pm
by AshishNJ
I know this is backwards.
I can probably live with brake performance on 79 or let’s just say I got used to of it and understood how inefficient or efficient they are but I still hate the forks.

To make it short, I have all the parts to mount 81 forks to 79 . I just don’t want to go with heavy 81 rotors etc to improve on braking and would rather look for some aftermarket solution. If I were to mount 79 calipers on 81 forks, would they fit ? I want to keep rear of wheel as 79

Re: Caliper swap from 79 to 81 ?

Posted: Tue Sep 01, 2020 10:01 pm
by steve murdoch icoa #5322
I would think the benefit of the double piston '81 calipers would far outweigh the extra bit of weight from the '81 rotors.

Re: Caliper swap from 79 to 81 ?

Posted: Wed Sep 02, 2020 6:40 am
by daves79x
Been mentioned here many times - go with 900F or similar rotors and calipers. With the 900F caliper hangers, it's a direct bolt on. Whole think much lighter than the Pro-Link set-up.

Dave

Re: Caliper swap from 79 to 81 ?

Posted: Thu Sep 03, 2020 8:21 am
by AshishNJ
Dave - Are these going to be good fit on prolink forks
https://www.ebay.com/itm/Honda-CB900F-S ... OSwKgtcjpZ~

Caliper seem to be single piston similar to 79 CBX unless if am looking at wrong model
https://www.ebay.com/itm/1982-Honda-CB9 ... Sw2CBbx2s7
Should they not be twin piston ?

Re: Caliper swap from 79 to 81 ?

Posted: Thu Sep 03, 2020 5:45 pm
by daves79x
Yes, those are the 900f rotors. When searching for calipers, make sure to get the hangers too.

Dave

Re: Caliper swap from 79 to 81 ?

Posted: Thu Sep 03, 2020 8:53 pm
by steve murdoch icoa #5322
https://www.ebay.com/itm/Honda-CB900F-S ... OSwKgtcjpZ

The seller of those rotors is an okay guy. :D

Re: Caliper swap from 79 to 81 ?

Posted: Fri Sep 04, 2020 8:15 am
by AshishNJ
The link for calipers I posted as example are single piston, shouldn’t they be dual piston ?
I have the prolink caliper and hangers . I am assuming they would not work ?

Re: Caliper swap from 79 to 81 ?

Posted: Fri Sep 04, 2020 3:19 pm
by daves79x
That is not a 900F caliper, sorry I didn't respond. No, the Pro-Link calipers are for larger-diameter and vented rotors - hangers are different also.

Dave

Re: Caliper swap from 79 to 81 ?

Posted: Sun Sep 06, 2020 6:42 am
by AshishNJ
Thanks Dave

Re: Caliper swap from 79 to 81 ?

Posted: Sun Sep 13, 2020 8:39 am
by AshishNJ
Found a set of rotors in good shape . Would these be a fit?
https://www.ebay.com/itm/81-Honda-CB750 ... SwZlhe69pb

Re: Caliper swap from 79 to 81 ?

Posted: Sun Sep 13, 2020 10:04 am
by steve murdoch icoa #5322
Not sure where you are in regards to acquiring parts for this swap but the link you provided is for calipers not rotors.
Is this what you meant to post? And yes they would fit.
https://www.ebay.com/itm/82-Honda-CB-90 ... Swk~xcrbkN

Re: Caliper swap from 79 to 81 ?

Posted: Sun Sep 13, 2020 11:13 am
by Jeff Bennetts
Those calipers are rough and the one is missing the bracket, not worth $200 in this condition! Expect to completely rebuild any used calipers you buy, not difficult, not expensive but necessary!

Any rotors you buy request the buyer to mic the thickness so you know where you're at if you decide to have them resurfaced!

Re: Caliper swap from 79 to 81 ?

Posted: Sun Sep 13, 2020 12:54 pm
by steve murdoch icoa #5322
As Jeff mentioned that is a big price for those calipers.
Maybe ask over on the CB1100F.net site in the For Sale/Wanted section.

Re: Caliper swap from 79 to 81 ?

Posted: Tue Sep 15, 2020 11:17 am
by AshishNJ
Thanks for the tips . You disturb a bee and there is a hive hiding behind it . I hate and love this bike at the same time 😀