Hi i was trying to race at Spa in the IHRO/BCGP, 74 starters on the grid. We had a walk round and found that 350/ 4 Honda indeed it was one of Johns bikes im sure speaking to the owner that he said William Dunlop did one lap on it at the MGP/Classic TT.
It had William Dunlop on the fairing and i think the owner said he is taking it to Ireland for some Classic bike show, and maybe taking it to Jurby during the MGP/Classic. The owners son was parading it.
Pity you missed out on my bike Simon, number 91.