Honda-SOHC

Hi all

Am I correct in thinking that from 1975 F1 to 1977 F2 the swing arm is the same and interchangeable?

Many thanks in advance

Best wishes Al


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Hi all

Due to my project to convert to a rear disc I have a set of brand new EBC rear shoes and springs going that were never fitted due to my cracked brake lining




Cost is £18 that includes post as got to get some back to fund the disc project

Just pm me

Best wishes Al


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Hi all the clear out continues for bits I no longer need / collecting dust

I have the following

Front brake disc £10 plus £8 post due to its weight



Brand new replica Rear brake pedal

£30 plus £5 post



Brand new Gear change linkage again £30 plus £4 to post (now sold)



Lastly I have a complete set of front pegs for £40 plus £8 to post due to weight

Note retainer pins have been replaced with stainless ones



Any questions please feel welcome to ask

Best wishes Al


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Hi all

As some of you know my rear drum has developed a crack that renders it either scrap or look to a possible repair.




Bike was never going to be standard / original, so now looking to see what is involved in conversion to a rear disc and thought I would do a thread about how I did the conversion unlike when I converted the front end to dual disc




First thing I needed to do was suss out a way of fitting a “disc carrier” that fits the standard hub to see what design was needed.

Spent some time yesterday modelling up a simple dummy disc carrier unit in 3d so I could then overnight print  and then dummy up the build on the bike just to see how it all fitted together and from first dry fit it looks good.

This is the 3d printed disc carrier in ABS.




And this is how it all fits together on the wheel and bike.







The final carrier itself will be machined from a solid aluminium billet and will be designed to lock the carrier in the internal bore so that it is solidly held in place to prevent sideway movement and other features such a extra bosses to lock it in place using some of the internal hub features to prevent possible rotation under braking (and also a oil seal like the sprocket side to prevent water entry to now exposed wheel bearing as the end spacer / boss you see on the dummy disc carrier will be a separate part the final disc carrier will revolve round this spacer)

But for now I am happy with the overall shape and size / distance of the disc from the swing arm and there is plenty of space to add a caliper hanger etc

The next stage will be to source a caliper and then design a caliper mount to suit my chosen unit to mount the caliper on the disc and use the original torque arm mount with a new torque arm arrangement

Again this will be modelled and printed so I can first test fit my design

Then the final stage will be how to convert my rear sets to operate a remote master cylinder

Once these three parts of the design are finalised I can then commit to the final parts in aluminium and then fit

Will update as thing go

Catch up soon

Best wishes Al


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Just wondered out of curiosity how much oil in litres per min a CB400F oil pump displaces on tick over

Any oil pump experts out there?

Best wishes Al


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Hi all

I have a question please

Has anybody replaced the M8 case bolts that clamp the main bearings together with head studs rather than using bolts

Just that when I was building my V8 rover it was highly recommend that as the engine was “tweaked”  I scrapped the head bolts and main bearing cap bolts  and replaced them with a stud and nut system  (ARP) as you get far more even clamping and is superiority to using a bolt system

Just that as my new engine will be a bit tweaked (460 cc /fast road cam plus other tweaks etc want to build a good bottom end    so make sense to go this way

Even on my RD, the area that clamps the crank in is as standard uses studs rather than using bolts

Any thoughts welcome

Best wishes Al


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Hi all I have the following letters stamped on my case that refers to the main bearing shells but which letter corespondents to which colour please




Also my rods have numbers too and am I right in thinking these are bearing codes too and if whey are what colour does each number represent




Any advice welcome

Best wishes Al


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