How do these perform compared to the standard method of replacing jets and moving needle clips? If they work good, it seems like they would save alot of time. If anyone has one, let me know how you like it.

 

I had a Dial-a-jet on my 250EX. I never could get the baseline jetting correct. Once, after a couple hours riding I found gasoline in the bottom of my airbox. The dial-a-jet was just spraying more fuel than I needed. I removed it and never had any more problems.

 

I have not heard a lot of good things about this product. Some people have the problem the post above did. He is lucky it went rich rather then lean. I have heard of a few people who burned up the engine when they did not realise it was too lean.