SOHC.co.uk Forums > CB500/550

Lead Replacement Additives for Fuel

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Robert W:
I saw a post from way back in 2010 about the need for lead replacement additives in fuel and was wondering if there was any change in opinion that it wasn't necessary. Anybody know if the CB500 1972 K1 engine has hardened valve seats?

florence:
My understanding is that any Japanese motorcycle built 1974 onwards is fine with lead free petrol; I have been running mine since 1995 unleaded without any problems.

Bryanj:
I thought that was all honda fours are ok

florence:
Good point, same engine 1972

Athame57:
I got told on here about six years ago by Julie I'm sure it was that unleaded was just fine for my CB400F.  :)

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