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I think cooper will do better than most think. Top 3 in mx2. Gerts and Prado will be the two ahead of him.

I'm pretty sure an Italian rider by the name of Antonio Cairoli has proven that theory wrong. Did you see prado at red bud or villo at buds creek.

Its driven by the consumers ultimately. 450s for us old vet riders is great. Sure I can be faster on a 250F and a 350F, but I have to wring the crap out of it in the process, which beats up the valve train and thus requires more maintenance. For most vet riders, lugging a 450 means it gets you around the track easier and is super reliable, incredibly reliable. I want power when I need it and I want reliability. I couldn't give 2 shits about winning races or being the fastest guy on the track anymore. I have...

Thanks for the responses. I'm taking the day off on Wednedsay cos it's school holidays and the kids wanna go riding. I'll take some jet's and play around and see how I go

I didn't say you can run any size jet. You can reread my post. The stock YZ2 engine can run better with optimum jetting, but it won't necessarily pick up more power up top unless the cyl. port timing is changed combined with a head reshape. Some engine tuners will raise the exhaust port aprox. 1mm to achieve that depending on the engine. That will raise the peak power in the upper part of the powerband range. Agree with you on the overbore of 265 as far as not being worth it. I've ridden on a couple & didn't feel...

These posts kill me. The amount of R&D? Have you ever seen japanese 2 stroke boat engines? 2 stroke road bike engines? Fuel injected, direct injected, etc. the japanese brands had KTM technology in the 80’s and 90’s. Difference being, they saw the way of the future with emmissions and didnt waste their time and money bringing it to motocross applications. KTM in no way brought tech to the market that the other brands hadnt already had. For decades longer than KTM. Kudos to KTM for selling it, people are buying in to it.