Well, I put mine in and it takes some time but is not too hard if you are into working on motors and things. My total cost was $45.00 and my bike runs great but putting it on the dyno is the only true way of knowing the bike is jetted right. If you are sure that they would dyno it and take the carbs back off to try different settings, well then it would be worth it but it sure would take a lot of time to do it this way.