1961 CB72 Project

G-Man · Post by **G-Man** » Sun Feb 04, 2018 3:26 pm

Wow - that sounds like a real expedition. Have a great time!

G

John Watson wrote:We're touring South Africa for a month. Went a few years ago and promised ourselves we'd go back some day and do it properly this time, self drive for 3000 miles taking in the Zulu battlefields(guide booked), Panorama route, garden route, Kalahari and Sun City together with pretty much everything in between.

G-Man · Post by **G-Man** » Tue Feb 20, 2018 12:43 pm

A CL77 rear shock being sold as a 'rare' 1961 CB72 shock.........

https://www.ebay.co.uk/itm/273077653332 ... 3077653332

Good luck with that.

G

Seadog · Post by **Seadog** » Tue Feb 20, 2018 5:43 pm

“Auction ended by the seller because of an error in the listing”. You think?

G-Man · Post by **G-Man** » Wed Feb 21, 2018 12:10 pm

I did send him a message with some pictures. I don't think anyone looking for a '61 damper would have been fooled in any case.

G

Seadog wrote:“Auction ended by the seller because of an error in the listing”. You think?

G-Man · Post by **G-Man** » Sat Mar 17, 2018 2:28 am

Apologies for total lack of progress in the last couple of months. I have been retired for three weeks so I have no real excuses. I'm just getting used to this business of being my own boss but the weather here has been horrible and my cramped workspace has prevented me from 'unpacking' the CB72 project from its winter residence.

First job will be getting the seat done. I have all of the materials but the seat pan still needs cleaning up and welding.

I have been busy helping a friend out with a Gilera 150cc single which ruined its big-end. That should be simple enough to fix but there are complications. Les wants to upgrade it to 175cc from 150cc (60 x 54 - sound familiar?). We could not find a flat-top piston with the correct deck height so I have settled on a Suzuki GS750 rod and a 64mm XL185 piston (+1mm gives 64mm) which gets the deck height somewhere close.

And the main reason for the big end failure, I think, is that the oil pump feeds the crank through a plain bush on the drive side and, I'm pretty sure, that bush was worn allowing oil pressure to leak away. I have to fix that next.

It's all good practice for some Honda crank modifications that I'm hoping to work on which will reclaim some scrap crankshafts and give them a new lease of life.

Back to the Honda soon....

G

DJM · Post by **DJM** » Sat Mar 17, 2018 9:59 am

Graham,

I'm a bit concerned about your 1961 CB72. From your latest images it looks as if the end result (soon?) will be far too good to ride regularly, hope that you prove me wrong though.

Keep up the good work.

G-Man · Post by **G-Man** » Sun Mar 18, 2018 12:26 am

HaHa!

Maybe David Silver will buy it and I can get a new Triumph Bonneville!

I have put a lot of work (details and actual restoration) into this bike so it may well be a 'sunny day bike'. I am hoping to get a CL77 and CB77 done later this year so I'll have something to ride.

My CB400F is becoming quite a classic these days also. :-)

G

DJM wrote:Graham,

I'm a bit concerned about your 1961 CB72. From your latest images it looks as if the end result (soon?) will be far too good to ride regularly, hope that you prove me wrong though.

Keep up the good work.

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