Probably so. We're not all you, tho. Worth noting - high perf kart guys, having tried, say the lifan isn't a good choice for hopping up. My own experience with a 152f-3 is that after a pretty short time of completely ungoverned operation, it wore out. Burning oil, loss of power etc. Less than 2yrs of moderate use. I weigh 135lbs bike is 98lbs, so not heavily loaded. Well maintained, e0 gas, and hi zinc oil changes every 20hrs. Kart guys report similar results. Kept to 4k rpm max and they seem to hold up well. This is all very unscientific and casual personal experience. YMMV ofcAnd with a more aggressive cam you would need even stronger valve springs, which brings us right back where we were before.
Also, I bet I could figure out valve springs easy enough if I had the OE specs. It's not rocket science, just some math