SOHC.co.uk Forums > CB750

Rear Mudguard (Chrome Section)

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Laverda Dave:
If the Vietnamese made part is for a USA model you could always ask them to send you one without the chrome finish applied. Once you receive it in the UK you could re-drill the holes to UK spec and fill the other holes in with a bit of plating or brazing and then get the guard chrome plated (and it will be less expensive than replating an old UK guard because the plating company only has to give your 'newly modified Vietnamese guard' a polish and chrome).
This is what I had to do with the front a rear guards for my 400/4. The PO had drilled huge holes in both guards to fit a tombstone tail light and some kind of chopper style shopping trolley rail on the front. I found a blacksmith who filled the holes and now they are plated you wouldn't know the holes had ever been there.

honda-san:
For exactly the same reason I have a US spec k2-K6 rear mudguard fitted to a 1970 UK CB750 - and the original black painted UK rear light bracket bolted straight on (the spacing of the four bracket mounting holes is the same). The bracket does appear to sit very slightly further up the mudguard such that the number plate is now slightly angled. The US rear mudguard also has an extra single hole at the rear for a rubber bump stop which (I think) is supposed to support the bottom edge of the US license plate (number plate). Pictures attached - the one with wet patio is the bike as bought with rotten original UK rear mudguard, the other with the US spec K6 mudguard fitted. Maybe it helps?

Martin6:
Thank you. Those photos are really helpful. Id be happy with that rear tail set up. I'm likely to go for the US one. Also, one of our members is not too far from me and has offered to show me his US version K6.

Thank you for your help. 👍

honda-san:
Curiosity got the better of me today, so I went searching out my spare rear CB750 mudguards.
Found three of them in a box. One is a plastic repro. One is a US style K6 mudguard in good solid condition, albeit with some marks / dents.
The other one is actually a UK spec (80100-300-600XW) in nice solid presentable condition. Shame someone has drilled it at the rear lower edge in a couple of places (for a mudflap possibly); also a couple of extra holes as if a different rear light bracket was fitted at some time. I guess the holes could be welded by those skilled at such things, and then re-chromed - though perhaps just cheaper to buy a US spec repro.

Martin6:
So that's what I've done. Of everything that bolts to the mudguard, the UK tail light looks to be the only difference in the parts book. I've ordered a US repro, with the tail light included. Hopefully it fits without further drilling. May need some work on the light's wiring, I'm hoping not, but shouldn't be too difficult.

Delivery is quite a date range, early June to early July. I will feed back on quality and fit, once it arrives.

Thanks for your advice. 👍

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