No one expected 2010 to provide brand new CRF450 Honda Dirt Bikes since it was one of the Honda motocross bikes which was completely redesigned last year. New for 2010 is an updated fuel-injection mapping, improved fork seals, revised suspension dampening, and an external plug for the ignition programmer.
As a reminder for new-comers the Honda CRF450 has been a "best-buy" since it's introduction in 2002 and has consistently received #1 Ratings by many of the motorcycle magazines. The 2009 CRF450 was a complete redesign focusing on a smaller, lighter feeling bike and a new engine incorporating fuel injection.
2010 Honda CRF250R:
The New 2010 CRF250 is essentially a scaled-down 2010 CRF450 and shares all of the upgrades the 450 received last year. The engine is completely redesigned for improved power delivery, and is more compact to provide a lower center of gravity for improved handling. A new forged slipper piston with a low-friction surface treatment helps ensure higher revs. A 50mm throttle body programmable fuel injection with sensors to monitor throttle position/intake air temperature/coolant temperature/manifold pressure all significantly improve partial-throttle response. The radiators have been redesigned and are larger to improve cooling. And the single-sided exhaust is back!
Also new for 2010 is a narrower aluminum frame, with stronger downtubes to improve front end feel. The front wheel is positioned 15mm further back towards crankshaft, and the triple clamp offset has been changed from 22mm to 20mm. The front forks are 48mm Showa's featuring all new upper/lower tubes. The rear Showa shock now mimics the layout of the CRF450's.