Running MHR / 900SS on modern fuel

Technical Help
#1

I’m close to getting my 1983 MHR ready to run again after over 20 years resting. The last time it was running was when you could get 4 star fuel.

Can anyone advise if they are running their MHR / 900SS on unleaded with original valve gear and if they use any additives?

mhr-low
mhr-low800×600 113 KB

#2

I’m in same position been told valve gear is fine, ignition timing about to find out ( fuel slower burn )

       Pod 👍