Honda-SOHC

 Never synthetic.

May I ask why? A completely rebuilt motor is effectively a new one and unless the various seals are affected by it why not use it?

I was always a Duckams 20/50 user, peer influence probably. Currently I'm using Halfords Classic 20/50 in a cb750 and a cb77.

https://www.ebay.co.uk/itm/1970-Honda-CB750-K1-Classic-Vintage-Rare-Beautifully-Restored-L-K-L-K-L-K/132643511007?hash=item1ee22b5adf:g:QcUAAOSw9mFbEUlH
How can this bike have a 69/70 reg?

Welcome do I spy a steering damper on the front?

Without it there is a ferocious low speed front wheel wobble. From what I have read on here the new shocks should sort it out. They are 10mm shorter than the Konis that are on it.

This is Horace; My name is John and Horace (as named by PO of 17 years) is a 1970 CB750 frame & engine No. 1031xxx. I have had it for 10 years and got round to getting it back to standard this year in order to go to the Classic TT as a retirement treat. Through this site found TEC Bike Parts and have just recieved a set of rear shocks hopefully to cure the nodding front end! I have the original seat which I will restore.
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I had a CB750 in the early 70s which I used to endlessly strip down for fun which interesed me far more than looking at it as I have very few photos it. I did ride it a lot as well, it was my only form of transport for about 6 years! When the original silencers rotted out I just cut them off and clamped VW Beetle silencer tubes on the ends of the down pipes. It sounded great and passed several MOTs like that! I did eventually fit a 4 into 1 on it.
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I do have a question of minor importance but niggling me none the less. What determined what colour the tank badge was? My H reg one had white ones and Harace has black. Both had/have 4 way split throttle cables so to be pedantic, pre K0. I will kick myself to the end of time for selling the H reg one but I moved on to enduro riding so it had to go.
I have a 1964 cb77 as well but am in the process of transferring it to my son so not strictly mine any more. I had a CA95 then a C76 before the CB750.