Help needed please; my carbs were in dire need of balancing (UK CB750 Chassis 1010369) the Morgan Carbtune made short work of the job and they adjusted beautifully, lovely steady idle etc.

The downside though was the #28 cap on No1 carb, the M6 thread in the carb top itself is almost stripped, not quite but very close, so it's now at least temporarily held firm with loctite.

Looking at the threaded section, the short tubular casting protruding above the cap body seems too thin to effect a typical thread repair, insert, helicoil etc.

I guess these small threads are vulnerable to ham fistedness and age so I can't be the first to have this problem, has anyone successfully repaired the cable adjuster thread, or failing that does anyone know where a replacement cap could be obtained?

Any advice gratefully received............Mick............kettle738     

I recently bought a NOS rear rim which I had intended to use on my early K2.  I confirmed with the well known Honda part supplier that it was a genuine Honda part and not a modern production item with the rim details stamped round the outside edge of the rim.

When it arrived I was slightly amazed to find it appears to be a rolled rim, identical to that on my K0 and markedly different from the straight edged front rim.

There is a slightly puzzling feature though; the DID logo is as expected in a small diamond adjacent to the valve hole, however the rim size details (2.15 x 18) are nowhere to be seen, so it is just a plain rolled edge rim with a DID logo in the correct place and no other features.

Is this normal or should they all have rim details stamped in........or have I missed something?

           Mick............kettle738

Hi all, I'm a newbie, my name is Mick Taylor, I live in Ivychurch, Kent, in the UK.
 
I've had an interest in vintage Japanese bikes for the best part of 30 years, all sorts of bikes, all Japanese, currently including three Suzuki GT750 kettles, an RE5 rotary, a Kawasaki Z1, Yamaha XS2 and an early '72 Honda CB750K2 (1,300m from new)
 
It is my latest acquisition that sparked my request to join this forum though, a bike I have wanted for a long while and I finally got to buy it.  The bike is a CB750, chassis number 1010369.  Not a sandcast, but an interesting bike all the same; those into numbers wouldn't take too long to confirm that this chassis number belongs to the first CB750 off the production line destined for sale in the UK. That makes it the first UK Japanese four cylinder bike, first disc braked etc etc, a little piece of motorcycling history in it's own right, manufactured 22nd October 1969 and sold in the UK in January 1970.
 
OK, it's not a sandcast!.....no, but I really needed to join this forum;  I love the depth and breadth of knowledge that surfaces here, and I have to say, this forum is something special, there is so much discussion around seemingly microscopic detail that simply can't be found anywhere else and that is priceless.
 
My K0 is not a sandcast, but with the exception of the engine casings it has way more similarities to the sandcast bikes than to anything else in the CB750 range; so much of the detail on your bikes is pertinent to mine....and if it isn't then I need to learn and there is no better place to do that.
 
I took the K0 out for a first spin a couple of days back, it's a hoot, I can't remember the last time I found a bike quite so unexpectedly exciting.......so different to the rather anodyne Z1 which I think is living on borrowed time in my garage......I would quite happily dispense with that and hunt down a sandcast.....probably will.
 
Before the K0 the two best rides in my garage were the RE5 rotary (yes really) and the CB750K2, but they both moved down one notch now.

Mick..............kettle738