SOHC.co.uk Forums > CB750

What would you do…..?

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Lobo:
I really appreciate my 1973 K2, ride / use it a fair bit, and am definitely not overly precious about it….

As an early NY project I’m planning to treat it to a facelift, and have the body set repainted (in touch with Menno right now), the engine out / fettle an occasional jumping 4th gear, engine repainted, cases polished, carbs vapour blasted etc. Most of the work, as a recent retiree (yay) I plan to try myself, whilst learning a bit along the way.

All good, until mentioning this to a K1 mate today. In the past he’s noticed my motor is actually a K3 lump, and highly recommend I seek out a replacement case with an Eng # plausibility in line with the K2 frame #.

Now I’ve been visiting the Sandcast forums lately, and from here too, realise that these folk and the K1 types (!) can be a bit ‘sniffy’ about what they’ve got (😂) - which is understandable given the changes the ‘750 was going through in 69/70. But by the time the K2’s + came along, I’d have thought the bike was considered in serious mass production, and ‘matching’ numbers less of an issue - particularly wrt resale value etc.

So… my question is… should I bother with this advice? Honestly my engine is a good ‘un, pulls strongly, has never missed a beat … or burned a drop of oil. I don’t plan a massive outlay of $$$s on this recon (since doing much of it myself), but swapping the Eng #, I could see, might be a pain & a path I wish I hadn’t bothered with.

Thoughts?

Ta.

Johnwebley:
Don't bother

Sent from my SM-A750FN using Tapatalk

Bryanj:
I agree not worth it, it will never be a megga money bike

Laverdaroo:
Just ride it, it makes you smile. Let em sniff ;)

Nurse Julie:
Is yours a UK bike Simon? Your mate may be telling you it's a K3 engine when if it is a UK model, the engine number would be correct for a UK K2 seeing as we had K2's from 72-75.

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