There's a word I last heard in the 70's when one of my mates at college put some cheap petrol he bought from a dodgy garage in Birkenhead in his Hillman Avenger. Turned out it had been cut with paraffin and the guy at the garage had his collar felt by HM Customs & Excise. Fast forward to last Sunday and I'm gabbing with a guy on a bog standard 07 Street Bob. He's telling me how hot it is running and I said they are running them very lean to meet the emissions targets. Then he tells me it's pinking under load, straight away another guy with a new Heritage says the same, his bike ***** so bad he has to use Super Unleaded. You want a proper modern engine I said, liquid cooled, I said so you don't have to fit heat deflectors coz it runs so bleedin' hot I said!