Author Topic: Keiths 400/4  (Read 54172 times)

Offline Coppertop1234

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Re: Keiths 400/4
« Reply #15 on: January 30, 2026, 02:40:59 PM »
Would someone confirm for me the front forks are 33mm ? or have i lost the plot already

On the bike were 31mm presumably off a superdream

I ordered from ebay forks,  top and bottom yolk all supposed to be for 1977 400/4

top yolk came 31mm  - forks from same place 33mm ??

I just sent them back if they cant sell matching kit what's the quality like.

still waiting for bottom yolk hopefully 33mm and what i need if i am correct.

now looking for top yolk and forks again.
I Love Tinkering with Old Classics
1970 Mobylette 50cc  
1972 Honda Cb175
1974 Yamaha Rd250  
1962 Triumph 650 Bonneville
1972 Norton Commando
1978 Honda CB400/4
1976 CB750F1 
1976 Suzuki GT750 Kettle
1978 Honda CB 750 F1 
Married Life No Bikes for a while then
1975 CB Honda 400/4 Restoration
1976 Kawasaki Z650   Restoration
2002 Suzuki GSX1400
1976 Honda cb750F1  Restoration
1978 Honda cb750 F1 Restoration
1977 CB 250 Dream    Restoration
1977 CB400/4  - The last one - Restoration

Offline Bryanj

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Re: Keiths 400/4
« Reply #16 on: January 30, 2026, 03:08:32 PM »
Look at cmsnl parts list , size is usually quoted

Offline Coppertop1234

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Re: Keiths 400/4
« Reply #17 on: January 30, 2026, 04:18:37 PM »
just found complete front end only 1 slight problem

they are in italy - hope they are not left hand drive

delivery in 2 to 4 weeks no rush plenty to do to keep me occupied.
I Love Tinkering with Old Classics
1970 Mobylette 50cc  
1972 Honda Cb175
1974 Yamaha Rd250  
1962 Triumph 650 Bonneville
1972 Norton Commando
1978 Honda CB400/4
1976 CB750F1 
1976 Suzuki GT750 Kettle
1978 Honda CB 750 F1 
Married Life No Bikes for a while then
1975 CB Honda 400/4 Restoration
1976 Kawasaki Z650   Restoration
2002 Suzuki GSX1400
1976 Honda cb750F1  Restoration
1978 Honda cb750 F1 Restoration
1977 CB 250 Dream    Restoration
1977 CB400/4  - The last one - Restoration

Offline taysidedragon

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Re: Keiths 400/4
« Reply #18 on: January 30, 2026, 11:43:27 PM »
Would someone confirm for me the front forks are 33mm ? or have i lost the plot already

On the bike were 31mm presumably off a superdream

I ordered from ebay forks,  top and bottom yolk all supposed to be for 1977 400/4

top yolk came 31mm  - forks from same place 33mm ??

I just sent them back if they cant sell matching kit what's the quality like.

still waiting for bottom yolk hopefully 33mm and what i need if i am correct.

now looking for top yolk and forks again.

400Four are definitely 33mm.
Gareth

1977 CB400F
1965 T100SS

Offline Coppertop1234

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Re: Keiths 400/4
« Reply #19 on: January 31, 2026, 12:29:43 PM »
cheers for that i thought they were 33 mm,but nice to have it confirmed
 :)
I Love Tinkering with Old Classics
1970 Mobylette 50cc  
1972 Honda Cb175
1974 Yamaha Rd250  
1962 Triumph 650 Bonneville
1972 Norton Commando
1978 Honda CB400/4
1976 CB750F1 
1976 Suzuki GT750 Kettle
1978 Honda CB 750 F1 
Married Life No Bikes for a while then
1975 CB Honda 400/4 Restoration
1976 Kawasaki Z650   Restoration
2002 Suzuki GSX1400
1976 Honda cb750F1  Restoration
1978 Honda cb750 F1 Restoration
1977 CB 250 Dream    Restoration
1977 CB400/4  - The last one - Restoration

Offline Bryanj

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Re: Keiths 400/4
« Reply #20 on: January 31, 2026, 03:50:50 PM »
I think your Superdream confusion is 250 were 31 and single disc whilst 400 was 33 and twin disc

Offline Coppertop1234

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Re: Keiths 400/4
« Reply #21 on: February 01, 2026, 09:21:29 AM »
Thought so

just having a debate with a no return on ebay who sent me a 31mm yolk, he said it is of a 400/4 and wants me to explain why they dont fit.

I sent him info on people used the superdream forks on 400's as a replacement and obviously the one he is stripping had had this  conversion to 31mm which are not correct spec for bike which i required.

Waiting for further response on return,but buyer protection should cover it as the are not as described.
I Love Tinkering with Old Classics
1970 Mobylette 50cc  
1972 Honda Cb175
1974 Yamaha Rd250  
1962 Triumph 650 Bonneville
1972 Norton Commando
1978 Honda CB400/4
1976 CB750F1 
1976 Suzuki GT750 Kettle
1978 Honda CB 750 F1 
Married Life No Bikes for a while then
1975 CB Honda 400/4 Restoration
1976 Kawasaki Z650   Restoration
2002 Suzuki GSX1400
1976 Honda cb750F1  Restoration
1978 Honda cb750 F1 Restoration
1977 CB 250 Dream    Restoration
1977 CB400/4  - The last one - Restoration

Offline Coppertop1234

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Re: Keiths 400/4
« Reply #22 on: February 05, 2026, 12:37:18 PM »
You couldnt write it
just speaking to a motorcycle shop friend and he is just breaking a 400/4 with a complete front end on it.
aw well you have to grasp the best option at the time , which was italy parts option for me.

I Love Tinkering with Old Classics
1970 Mobylette 50cc  
1972 Honda Cb175
1974 Yamaha Rd250  
1962 Triumph 650 Bonneville
1972 Norton Commando
1978 Honda CB400/4
1976 CB750F1 
1976 Suzuki GT750 Kettle
1978 Honda CB 750 F1 
Married Life No Bikes for a while then
1975 CB Honda 400/4 Restoration
1976 Kawasaki Z650   Restoration
2002 Suzuki GSX1400
1976 Honda cb750F1  Restoration
1978 Honda cb750 F1 Restoration
1977 CB 250 Dream    Restoration
1977 CB400/4  - The last one - Restoration

Offline Coppertop1234

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Re: Keiths 400/4
« Reply #23 on: February 07, 2026, 06:22:00 PM »
Front forks landed and they are just as they should be no pitting well pleased.

stripped and cleaned then fitted them ,then new brake line and pressure switch Stage 1 done  for now

Fitted DS replica exhaust   No major issues

Removed all the old pvc tape off the harness and replaced with heatproof  / waterproof fabric tape - looks a lot tidier

Rewired and yes she fired up exhaust sounds nice, but carbs are well out - job for a bit later.

just tried an old 400 wheel in forks and the axle that was on bike with comstars is too big and speed drive is not compatible either, no surprise there

glad i tried them before i started stripping old wheel back to hub.

A good days progress today, well pleased with results




« Last Edit: February 07, 2026, 06:27:00 PM by Coppertop1234 »
I Love Tinkering with Old Classics
1970 Mobylette 50cc  
1972 Honda Cb175
1974 Yamaha Rd250  
1962 Triumph 650 Bonneville
1972 Norton Commando
1978 Honda CB400/4
1976 CB750F1 
1976 Suzuki GT750 Kettle
1978 Honda CB 750 F1 
Married Life No Bikes for a while then
1975 CB Honda 400/4 Restoration
1976 Kawasaki Z650   Restoration
2002 Suzuki GSX1400
1976 Honda cb750F1  Restoration
1978 Honda cb750 F1 Restoration
1977 CB 250 Dream    Restoration
1977 CB400/4  - The last one - Restoration

Offline Coppertop1234

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Re: Keiths 400/4
« Reply #24 on: February 10, 2026, 01:20:00 PM »
Just mounted horn and tacho guide only to find horn then didnt work .

after investigation it would seem a previous owner had cut the wires in the switchgear and taped them back together.

Not a great job of doing connections horn switch was araldited in place so in short switch gear needed replacing to do the job right.

The switch gear didnt seem to fit quite right either with a visible gap all way round the joint, so is probably also of a different model.

Cleaned and tidied rear light mount while playing.

Its all part of the fun finding whats right and whats not.


I Love Tinkering with Old Classics
1970 Mobylette 50cc  
1972 Honda Cb175
1974 Yamaha Rd250  
1962 Triumph 650 Bonneville
1972 Norton Commando
1978 Honda CB400/4
1976 CB750F1 
1976 Suzuki GT750 Kettle
1978 Honda CB 750 F1 
Married Life No Bikes for a while then
1975 CB Honda 400/4 Restoration
1976 Kawasaki Z650   Restoration
2002 Suzuki GSX1400
1976 Honda cb750F1  Restoration
1978 Honda cb750 F1 Restoration
1977 CB 250 Dream    Restoration
1977 CB400/4  - The last one - Restoration

Offline Coppertop1234

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Re: Keiths 400/4
« Reply #25 on: February 11, 2026, 03:42:30 PM »
New switch gears arrived and fitted

The quality of the DS replica seems decent and looks as good as originals

Slight disappointment the wiring is not matching to original - ok for me with the matching colour guide provided, but may be a problem for someone else at a future stage down the line.

I will make note on DS invoice of colour matching wires to keep in file.
I Love Tinkering with Old Classics
1970 Mobylette 50cc  
1972 Honda Cb175
1974 Yamaha Rd250  
1962 Triumph 650 Bonneville
1972 Norton Commando
1978 Honda CB400/4
1976 CB750F1 
1976 Suzuki GT750 Kettle
1978 Honda CB 750 F1 
Married Life No Bikes for a while then
1975 CB Honda 400/4 Restoration
1976 Kawasaki Z650   Restoration
2002 Suzuki GSX1400
1976 Honda cb750F1  Restoration
1978 Honda cb750 F1 Restoration
1977 CB 250 Dream    Restoration
1977 CB400/4  - The last one - Restoration

Offline mickwinf

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Re: Keiths 400/4
« Reply #26 on: February 11, 2026, 04:26:47 PM »
the thing that bugs me is costs the same to use the proper colours, so why use any others?
Love the 500 and 550 have a 500 called Lazarus under restoration

Offline Coppertop1234

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Re: Keiths 400/4
« Reply #27 on: February 16, 2026, 05:24:28 PM »
Hi would some one be able to post me a few pics of horn mount from both sides.

Better to ask than bodge about trying this and that.
I made the previous mounts which fit and have the horn facing forwards under tank.

I have now got an original horn and fittings, but unsure if i have them all and how they go?
Got horn working and cleaned up, but do i have everything

pics of what i have.

I think
Short wire clip if rh side as a cable retainer for throttle cables?
Angled bracket is Left hand side and has a rubber cable retainer like battery box one fitted from frame to bracket?
Horn mounts on rh side flat to frame  with fixed bracket 2 holes at top - no pic?
Where does taco retaining wire fit ?

cheers
keith


I Love Tinkering with Old Classics
1970 Mobylette 50cc  
1972 Honda Cb175
1974 Yamaha Rd250  
1962 Triumph 650 Bonneville
1972 Norton Commando
1978 Honda CB400/4
1976 CB750F1 
1976 Suzuki GT750 Kettle
1978 Honda CB 750 F1 
Married Life No Bikes for a while then
1975 CB Honda 400/4 Restoration
1976 Kawasaki Z650   Restoration
2002 Suzuki GSX1400
1976 Honda cb750F1  Restoration
1978 Honda cb750 F1 Restoration
1977 CB 250 Dream    Restoration
1977 CB400/4  - The last one - Restoration

Offline exvalvesetdabbler

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Re: Keiths 400/4
« Reply #28 on: February 16, 2026, 08:05:55 PM »
I think the forward facing horn was a requirement in some European countries. Netherlands being one.

The horn bracket goes on the right hand side, and on mine the cable tidy wire piece goes on the front mounting bolt.

The bracket for the rubber strap on the left, there should be a bit on the frame for the other end of the strap .

Don't bother until your done with plugs and tappets. It just gets in the way.

Regards
Dave.

Offline exvalvesetdabbler

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Re: Keiths 400/4
« Reply #29 on: February 16, 2026, 08:10:19 PM »
The dealer setup manual will show you the cable routes.  It's in Ash's Dropbox.

The tacho cable just dangles,  clutch and throttle go through the clip.

Regards
Dave