26-06-2022, 03:28 PM
My BSA (1023 V twin) will not run to full throttle on E10. I filled it to the top by mistake and wondered what on earth was wrong with it as it was sounding as if there were air leaks all through the inlet/carburettor department. I tried everything I could think of to find an air leak, cleaned plugs, checked timing and gave up. The car would run OK up to half throttle, about 45-50mph in third, but as soon as I put my foot down to get up to a good cruising speed it was pinking and banging away like fun.
I called the BSA guru (Simon Berringer) and he immediately pointed at the fuel saying there had been many similar reports from other owners. The low compression ratio doesn't help. I drained some and added E5 and kept topping it up and the problem has gone away. I use Millers octane enhancer additive which has been successful in the past.
I called the BSA guru (Simon Berringer) and he immediately pointed at the fuel saying there had been many similar reports from other owners. The low compression ratio doesn't help. I drained some and added E5 and kept topping it up and the problem has gone away. I use Millers octane enhancer additive which has been successful in the past.