I have the same thing happening only it takes me a short bit to get to even 45, just has no power. and I got up to 76-78 earlier today but any kind of hill at all and I was dropping to 4th in hopes of staying above 55.then hope for down slope to get back to the speed limit. im feeling a 4g63t swap will be a must when I get my fall school loan. ive had mine for 2 days and I admit I love the thing but my friends golf cart could yank me around the yard probably. maybe a locker and some 4.10 gearing would help us. honestly I see the weber as a waste, if we cant get up to speed in a reasonable time now a carb swap isn't going to do much if anything other than throttle response in itself. my .2