I originally posted that the YZF is a good trail bike - let me clarify - I meant good but not great. If you want to plonk along on tight trails there are many bikes that are better at that sort of thing (including the WR426). This is not even considering that the YZF (or WR)can be a beeeyatch to restart in a tight situation. Also, the YZ426F has a taller first gear than the YZ400F. If you need a motocrosser that can go on the the occasional trail ride, the YZF is a good choice, but a mountain goat - it isn't. If I keep this up, I might talk myself into a KTM520 EXC (electric start)with resprung and revalved suspension for moto. But that would mean my dirt bike would be worth four times as much as the piece of junk vehicle I drive. Will the madness ever stop?