thanks again for the advice, I am running standard bosch w7dc but was trying to find the equivelent in the super 4 bosch but have not sourced them yet. I also use mainly shell 95 grade fuel but have tried shell 98 grade for about 4 tanks and found it made no real difference of note. I have thought a lot about twin plugging when I am re doing the heads anyway so maybe this will all help. When I was doing the conversion I noticed the valves had quite a bit of burnt on carbon built up this might also not help like you say creating hot spots - but I did not want to start doing the valves at that time but will be doing them soon so will have a good look at the barrels and pistons while I am in there. As for the oil consumption I am off to Germany on the bike this week (about 1000km round trip) I am doing an oil and filter change tommorow before I set off so will take have the opportunity to get an accurate mileage/oil consumption check done by the end of my trip next weekend.
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