Would it be safe for me to ride a 2004 Honda crf 250R when I'm 240-250 lbs?

I'm about 6'2 and around 240 lbs and only plan on riding around the farm, no MX.

If you are on even ground, you would be able to go, but slowly. If your area is hilly, you may have problems pulling the hills. Most of this type of bike is considered for off road, but that is usually on a prepared dirt surface. So if you have a road on your farm that is a hard surface this bike would suffice. Since you stated you'd be riding around the farm, why don't you consider an atv instead. Then you could haul small work items with you. I had a 150cc bike once and my 6'1, 258 lb. Husband had pulling problems just riding it around our yard in the grass.

I ride 08 yz250f. I'm 5'11" and weighing in at 215. I was pushing 229 there for a bit. I ride technical trails (but pucker stuff) and free ride open areas sometimes. I ride my bike like I stole it. If your just riding around a farm just tighten the suspension. I have mine set as soft as I can for trails and rocks. Again I was pushing past 229 for just little bit, never bottomed out the suspension. All stock front and rear.