05 250ex mods
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05 250ex mods
On ours, we have vented the airbox lid (1" UNI round filtered vents), UNI foam air filter (has its own support cage, not the restrictive stock one), an FMF muffler (I would go with PowerCore 4 today), and of course a rejet. The difference in power is noticeable, but not dramatic.
If you ride in the wet a lot and don't want to vent the airbox lid, you can enlarge the snorkle opening (which stock is the size of a quarter). Don't get to radical with the airbox though. The little engine can only handle so much air. I tried pulling the lid off completely, but couldn't get it to jet right with that much air coming in.
If you ride in the wet a lot and don't want to vent the airbox lid, you can enlarge the snorkle opening (which stock is the size of a quarter). Don't get to radical with the airbox though. The little engine can only handle so much air. I tried pulling the lid off completely, but couldn't get it to jet right with that much air coming in.
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