My son-in-law, who works on motorcycles, told me yesterday that they were beginning to have problems with fuel lins and pumps in numbers they haven't seen before. The workshop staff are fully convinced that the problems are unique to those riders who use E10 petrol. As yet, they have had no problems with those using E5. Specifically, they are far more noticeable on the bikes that are only used occasionally, with longer periods of standing. He also poited out that; according to the manufacturers, all these bikes are suitable for E10.