Honda CB750 Sandcast

fuel additives

jphprec

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just got 70 running and took it for its first ride in 28 years, it was crazy cool nothing like the Harley's i am used to riding, my question is do i need to add anything to the fuel on this stock bike? will running pump gas mess with the valve seats,,,,thanks Jim


Wayne

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Jim. I had this question as well when I was looking into rebuilding my head. The answer is, you should be fine on pump gas. Aluminum heads already have hardened seats pressed into them so they won't sink from the reduced lubrication in Lead Free Fuel, Gas, Petrol whatever you want to call it. (That was for KP) ;) Old cast iron heads area different story.
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Riccardo

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The laws have changed the fuel in the last 30 years.
The early 70 fuel is't the today fuel.
Now the fuel is green, without Pb.
I prefer to use that we call (in Italy) V/power by  Shell, it is 98 octane and is good for our old engines with carbs.
Riccardo
Your Italian friend.
737/940 Restored
1081/1362 Preserved
1256/665 Restored - ex Owner: Chris R.
10253/10315 (K0) Next project
1969 - Kawasaki H1 Mach III low ign cover - Restored
1969 - Kawasaki H1 Mach III high ign cover - Restored
1971 - Kawasaki H1A - Restored
1973 - Kawasaki H1D - Preserved
1973 - Kawasaki Z1 Blackhead - Restored
1971 - Norton Commando SS - Preserved
1978 - Honda CBX - Unmolested Museum Quality
1988 - Honda CB 400SS - Unmolested
1997 - BMW R80 GS Basic - blue frame - Museum Quality
2007 - BMW HP2 Megamoto - blue frame - New