2T Institute,
I'll take my sources over your 'Institutes' knowledge .
Lorenzo's last 250 was in 2007, and I've heard of more than 109HP from his mount. Simoncelli and Aoyama had another 1, and 2 years developement. And the claims that circulated of how Aoyama was running on 'spares' are complete and utter BS - Honda threw their weight at that engine, to get the last ever 250 World Championship. A hell of a gamble though, placing their efforts into one rider, but, it worked for them.
My information comes from a couple of close friends who have worked in GPs for over 20 years. And others.
HP take off at gearbox, for the amounts I've been told. Perhaps that graph is a rear wheel take off?
If the power / rev combinations of 125RRs was usable, and reliable, in MX / Offroad, the 250fs wouldn't be able to be sold with their 34 /39 std HP ranges. Hell, there would still be 125s being used from the club level through to the highest levels in World MX, in droves, to go up against the 40 - 45 (+?) hp modified / works 250fs. Somehow I doubt that Roczens KTM used in the final round had HP similar to that shown on your dyno graph, from 2010, for the RSA and RSW Aprilias. The other, I assume is the curve of a 'real' Derbi engine. And if anyone had the talent to make use of a 125 Road Race power curve, it is Roczen.
When you seem to dismiss DFI, for example, with the cooling aspects of an air And fuel charge being vital for a 2t (as it indeed is, in current / old tech power plants), you seem to ignore / not realise that that loss, would be addressed by appropriate measures, be it through materials, or other cooling methods. For any change, change is required - a simple, and true axiom. I appreciate your enthusiasm, and input both here and on other sites, but there's a lot of people around with a fair amount of experience, that won't necessarily take your opinions, as being the gospel of 2ts. I happily defer to those who I know that are far more knowledgeable with regards to ICE tech, than I. And I think you might well come under that heading, to a certain extent. I'm lucky enough have access to / friendships with, quite a few people that conduct their ICE careers at extremely high levels. And the reports I get from them, is of 60+(just), and 120+(just) HP from the last of the 125s and 250s. I'll go with their information and knowledge.
