Trailmaster Blazer 200R upgrade recommendations

As the title suggests. It has the 168cc engine. I have one for my kids to drive around and it needs a carb. Is there any brand better than another brand? Also looking at a better clutch as the one we have no longer has a smooth engagement and pops into gear once the engine revs up. What are some standard upgrades y’all have done if you own one? TYIA