CB350 Resto-Mod Cafe'

[kennyw]

Hi Chip, thanks for the kind words.

I posted a photo of the extended counter shaft (output shaft, where the sprocket connects). It's probably the part of the project that gets the most questions. The shaft had to be extended or lengthened to accommodate the wider swing arm. In most cases; the choice is to buy or fab an offset sprocket and make some sort of out board bearing support.

Since I scrimped on this previously; here's more details

Original shaft and another just like it was checked for material type ("spark tested"), and checked for hardness. Also did the sprocket. All of these were annealed. Annealing brings the metal back to its original state (or close to it), makes it much easier to machine and weld.

Here's the original shaft and 34mm of the other shaft. Drilled and threaded for keeping the two pieces together during welding. The bevel on each allows a deeper- stronger weld.


Made a tool for turning the sprocket by taking the remaining piece of shaft, welded a sleeve, trued it on the lathe, and narrowed the sprocket to fit the 525 size chain.


Here's the shaft (lower one) temporarily installed after heat treating to get the durameter back to 60.

Sounds like you have a rubber part. I think you meant Rockwell (as in hardness scale)?

Did you xray the welds as well? With torsion and fatigue loading on a location like that would make me feel better knowing the welds were near perfect.