twin disc conversion

[Johnwebley]

hi all,

 forgive me,but this is pick your expertise time,

I have a standard single disc setup,
I would like to go to twin discs,

can you advise me on the pitfalls,
I guess I shall need a new m/cylinder,caliper,caliper mount,2 bolts,disc,6 extra long disc bolts,hoses,flexi and pipe,
what about new rh fork leg? speedo drive?

are these available,source of parts?


thanks all,

John

[Ewan 500 K1]

have a look at these links to get you started John:

http://forums.sohc4.net/index.php?topic=53532.25
http://forums.sohc4.net/index.php?topic=68423.575

[Bryanj]

John, helps if you say what bike mate

[Johnwebley]

John, helps if you say what bike mate

the bike in my profile pic,

 1974  M reg K1 Cb500-4

thanks
John

[Bryanj]

In that case you will need the slider from a 550 or a PAIR of forks from a 550 (internals vary so fitting just one complete fork is not advisable) plus if you look at the other thread on twin discs I linked a word document with a How To.

Always worth putting in what bike mate as avatars don't always show up

[SteveD CB500K0]

Put your bike in your signature. Simples…

Steve

[Ewan 500 K1]

hopefuly my pain and agony and oddjob's and bryan's comments in my post at http://www.sohc.co.uk/index.php?topic=5571.0  are helpiing .. hopefully not confusing or putting you off have a go yersel John 

[matthewmosse]

I was under the inpression that 550 forks were slightly longer than 500 ones - they'll swop over as a set so that is ok. Where I am puzzuled is my 500 has capacity to carry twin disks but as far as I know it has 500 forks. One to worry about when I recommission the sidecar outfit.

[Bryanj]

500 never had twin disc capacity so it must have had as a minimum a 550 slider but more likely 550 forks

[Johnwebley]

hopefuly my pain and agony and oddjob's and bryan's comments in my post at http://www.sohc.co.uk/index.php?topic=5571.0  are helpiing .. hopefully not confusing or putting you off have a go yersel John 

 thank you Ewan,and all of the posters,it seems that i need a 550 front forks first,then lots of bits -))))

I will explore the availability and cost,

thanks all

[Johnwebley]

In that case you will need the slider from a 550 or a PAIR of forks from a 550 (internals vary so fitting just one complete fork is not advisable) plus if you look at the other thread on twin discs I linked a word document with a How To.

Thanks Bryanj,  I downloaded your instructions,and am sourcing parts,are 550 fork tubes the same Diameter as the 500,and will they
fit my original yokes?can I just swap the 550 sliders onto my forklegs and internals?
thanks for your help,

all of you

back to feebay to explore more

[Bryanj]

You can fit either complete forks as a pair or just the sliders if your tubes are good, I think going back 30 year i only fitted the one slider but memories can be wrong

[Johnwebley]

looking at parts


 disc  £35

 caliper and bracket £90

master cylinder £35 + brake light switch £15

hose etc £40


forks £90
HT bolts FOC  I hope

plus odds and sods,new seals ,bolts etc

that should be about that,

also new set of tyres about £160

jezzzzz

september is going to be expensive,and petrol at £1,37.9 a litre !!

I shall let you know what happens

[Ewan 500 K1]

some stuff on eabay just now John:

caliper arm, £32
http://www.ebay.co.uk/itm/CB450-K-Bremssattel-Halter-caliper-holder-CB500T-75-Schwenkarm-CB350F-CB550-/151045760481?pt=Motorrad_Kraftradteile&hash=item232b0765e1

forks, from £60... this one shows a caliper arm attached:
http://www.ebay.co.uk/itm/HONDA-CB-550-4-FORKS-/251163168887?pt=UK_Motorcycle_Parts_13&hash=item3a7a7dd077

master cyinder (comes with integrated switch) £35 (new):
http://www.davidsilverspares.co.uk/GL1100-GOLD-WING/part_160384/

[Johnwebley]

thanks Ewan,

 I saw the Master cylinder,but decided I wanted the older round resevior type,like

http://www.davidsilverspares.co.uk/GL1000K2-GOLDWING-1977/part_126548/

the caliper and bracket  are

http://www.ebay.co.uk/itm/Honda-cb-550-four-brake-caliper-1977-/271228605178

the forks look a better bethttp://www.ebay.co.uk/itm/Honda-cb-550-four-forks-1977-/271228589227

http://www.ebay.co.uk/itm/Honda-CB500-CB-500-Four-4-Brake-Disk-/350845499406


and this disc

thanks for your help