https://cscmotorcycles.com/jet-kit-complete-4-piece-sg250-tt250/
This is not advertisement for CSC. It is a kit from CSC for almost no money to do what so many people want GS500 to do, run right without carb issues when new. I know new GS500 is now old.
I wonder how CSC bypasses the USA EPA to sell this here.
From that link -
Complete Jet Kit for CSC Motorcycles TT250 & SG250
This carburetor jet kit is a great way to improve the performance of you stock TT250 & SG250 carburetor. It allows for maximum adjustment in performance tuning for all situations.
Comes complete with: #112 Main Jet, #115 Main Jet, #40 Idle Jet, and Air Mixture Screw.
You pick the right one ???
BTW CSC is Chinese sycles of California or some BS like that IIRC. They used to make a cool chopper called a pagsta a few yrs ago.
Cool.
Buddha.
CSC makes a bunch of pretty cool motorcycles. Their new 400s look pretty sharp. SG400 looks like a winner, and they have a Monster lookalike. All of these bikes are under $5K brand new. I like these bikes because there's nothing else in their bracket right now. If Honda brings the India-market CB350 here for an affordable price then there might be some closer competition for the SG400. I guess a CB300F or Ninja 400 are close to competitors for their little 400cc Monster-looking bike but the CSC just looks better. TU250X is the closest thing to their 250 twins but it's a single and I'm sure the CSC are just nicer. Too bad they don't make a gas powered 150cc version of that electric super cub copy. Maybe I'd buy one.
Anyway, this jet kit is obv. for their 250cc bikes which have a clone of an old Yamaha engine design, prob. pick main jet based on how much ethanol is in your local fuel.