the only inside green carbs I saw had the manifold to the cylinder broken or sat in the rain for years... best check the manifold and air filter hoses too.
Patrol 2013 with quite a few add-ons from Jim Petitti.(RIP)
8 weeks 12.000km Oregon - Alaska - Oregon, Engine broke free at 21.000km now in CR 39.000km and counting.
With a DIY foam air filter the rig runs well even in tropical rain. The air box looks then like an aquarium.
Final drives: 1. at 5000km, 2. at 34.000km(+friction plates)
The Avatar are 2 rice grains stating life's essence:
"The most important you cannot see!"
=> Attitude makes the difference!