OMG yes. I have a slightly larger carb, but jetted perfectly now for my combo. I put the lid on for washing to keep water out (about all it's good for) and forgot to take it off the other day. Instantly fouled the plug, wouldn't run for sh*t. Amazing what a difference it can make.
So, the opposite is true if you run without it and don't properly jet for it. Runs great until the piston seizes. A local bike mechanic told me he see's about one Blaster a month come in needing a top end cuz somebody took off the lid without rejetting.
So what the hell, buy the kit and have fun. Just remember to jet again after you add that pipe and filter.