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aluminum frame generations

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I know 97' was the first year of the CR250R aluminum frame. But in what years did CR250s get new "generations" of aluminum frame?

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It was changed again in 2000, then again in 2002 and it's the same up to 2007.

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97-99, 00-01, 02-07

00-01 was the straight frame, 02-07 is the frame with the curve in it.

Well the 97-99 frame looks pretty straight to me. :bonk:

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Thanks for the info!

I hear bad things about the 97-99 frame. Too stiff or something? I mostly ride dunes and I'm not sure I'd describe myself as the most discriminating when it comes to chassis characteristics. Should I care about what I hear on the 97-99? How is the carb access with that frame? If I had to swing the subframe and airbox out of the way to make a jetting change, that is something I'd notice and care about.

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Thanks for the info!

I hear bad things about the 97-99 frame. Too stiff or something? I mostly ride dunes and I'm not sure I'd describe myself as the most discriminating when it comes to chassis characteristics. Should I care about what I hear on the 97-99? How is the carb access with that frame? If I had to swing the subframe and airbox out of the way to make a jetting change, that is something I'd notice and care about.

On my 05, jetting changes are just a matter of loosing the carb clamps. I don't know about the older ones though.

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To jet my 02, I can just loosen the two carb clamps and rotate the carb toward me. Just make sure to drain the bowl- I made that mistake more than once....

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