G'day Darryl,
With regards to the spring, it is not the correct spring.
I have doctored it to suit, I know the consequences if it doesn't work.
I tested it with the drill and it throws out at a similar speed to the quantum one I had as a sample.
I put a bit of tape around the camshaft to protect it from the chuck jaws.
Yes, wear is minimal on the piston, bearings and crank pin.
The bore looked OK to me so I didn't hone it in the end.
All carbon removed and lapped the valves which were not that bad.
![[Linked Image]](https://www.outdoorking-forum.com.au/forum/uploads/usergals/2014/09/full-4730-17652-ohv_bs_60_19.jpg)
![[Linked Image]](https://www.outdoorking-forum.com.au/forum/uploads/usergals/2014/09/full-4730-17653-ohv_bs_60_20.jpg)
Will do some assembly today and check in again tomorrow.