yz250 vs yz450f weight

Does anyone know how much these motors weigh? I race a kart with a 2003 yz450f and was wondering the weight difference is between it and a 1999 yz250 ? Can anyone help?

http://www.thumpertalk.com/forum/showthread.php?p=8142109

I've shipped a lot of 250cc motors and they come in around 48-50 lbs bare motor. Any 400 426 or 450 motor comes out almost 15 lbs or more. I think the crf450 motor I shipped lat month was 70 lbs but thats with the box and everything. Hope this helps

A little bit of google always helps ... :crazy:

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