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So say they allowed you to run 250s in the 250 class...etc and even it up. 2 strokes are so simple what can you really do that they havent? The 4 strokes jusssst started adding finger followers allowing for much more aggressive cams than weve seen so far. You can have single cams like the ktm with basically forked roller rocker arms from a central cam- which Idk how this makes so much power as the simplest head, but it works and its light. Then the Crf450r has the single cam over the intake with a rocker arm going to the exhaust valves. Then you go all the way to the 19’ Kx450 which uses superbike tech with roller rockers now on both cams like the crf250r also uses now which is as high tech a dohc cam setup as it gets and the most high tech in each respective class from those 2 engines.
For 2 strokes you can do direct injection, which they say makes it ride more like a 4 stroke which imo if they want to be competitive thats not a bad thing. Then what an electronic power valve? Maybe have a couple... Maybe better reed valve systems which i dont think direct injected would even need Im not sure. Then obviously elec start. Ive heard theres things they can do with pistons, but what more can you really unlock in an engine with no cams? Anyone know any new 2 stroke tech that would be going into these bikes if they were still used?
For 2 strokes you can do direct injection, which they say makes it ride more like a 4 stroke which imo if they want to be competitive thats not a bad thing. Then what an electronic power valve? Maybe have a couple... Maybe better reed valve systems which i dont think direct injected would even need Im not sure. Then obviously elec start. Ive heard theres things they can do with pistons, but what more can you really unlock in an engine with no cams? Anyone know any new 2 stroke tech that would be going into these bikes if they were still used?
The Shop
This is the future of MX. Ya baby 96mpg ahahahaha.
Of course Boyeson and Moto Tassanari make after market, (sometimes OEM) reeds for them.
The industry is also moving ahead with how they channel lubrication to the bottom end, with atomized and computer regulated misting of the rotating crank and rod, since they lack a transmission like an MX bike.
The typical horsepower from the 800 cc twins put out 155-160 and now the 850 cc's are putting out up to 180 hp.
So, with that, maybe some of that could cross over.
He confirmed the design of the KTM125 being light years ahead and that with a specific amount of money it wouldn't be out of the question to get either 45 or 50 HP. It wouldn't be cheap but he said its doable.
If I'm not mistaken, there are theoretical max efficiency values that can be calculated based on the potential energy in the fuel, and the heat of combustion, friction losses, and some other fancy math/physics. I'm pretty sure we are already very close to the maxing out what an ICE can deliver. Just like with weight savings you reach a point where it gets to be very expensive to make even the slightest gain. When economics don't matter (F1) you can keep pushing that envelope. But in our (dirt bike) world, I think we're pretty damn close to reaching practical limits.
Post a reply to: ...another 4t vs 2t debate but diff take on it