I have an 02 RX carb model. i've read other RX's getting up to the lower 60's. This one will do 55 wot and trimmed level. I need to get a GPS speed. I raced my buddies XP and it kept right up with him and he said he was doing 65. I took a look at the jet pump and noticed that the wear ring looked black from what i could see with a flash light. and the impeller looked a little nicked up so I guess this winter i'll be pulling it off and replacing whatever needs to be replaced.