As you can see there aint much for contributors in these forums these days and not much reason to visit to make new inquiries. Sometimes a search might reveal similar answers from questions in the past, but the off-road forums havent ever been popular here...
Your desire to jump from a CRf80 to a CR250R is more than a bit unrealistic...
The CRF250R is a motocross race bike, and not legal for trail riding, which is why Honda makes the CRF250X with some alterations which is legal for trail riding and BETTER: different gearbox ratios, suspension, exhaust, rear wheel, lights, electric start... and more.
Honda has an excellent line-up of four-stroke trail bikes. Probably the best among the Japanese manufacturers. There's years of experience behind why there are 3 trail bikes between your CRF80 and the CRF250X: so that you can advance as a rider and grow into the bikes... CRF100F, CRF150F, and the CRF230. (Also a used CR85 is a pure motocrosser with a high-performance 2-stroke (which the CRF150R motocrosser replaces)).
The bike that comes to mind as being a real good step up for you is the CRF150F.
I may expand more on this later...
"Zounds! Zorched by Zarches, Spaceman Spiff's crippled craft crashes on planet Plootarg!"
For Sale: Ninja 600 with parts bike, needs minor work, $30, no title... (GEE THAT DOESNT RING ANY WARNING BELLS DOES IT?)