26 or 28mm SC2 SmartCarbs are designed to replace conventional spigot mount top-pull carburetors in 2-stroke applications and will fit most intake manifolds and conventional air boxes that use Keihin PWK 28mm or Mikuni VM or TMX 24mm and 26mm carburetors. See dimensional comparisons in the photo gallery below. These have NO jets, and you simply make any adjustments on the top of the carb, its a 10 minute install! Don't forget to grab a THROTTLE CABLE FOR PWK, OKO, POLINI CP   Need a 38/38/40mm, click here Performance Guarantees Ride Faster | 10% more power Ride Farther | 25-30% greater fuel economy Crisp, linear throttle response bottom to top! Tuning/Ease of Use Make adjustments by hand, in seconds (no tools required) Complete air density compensation (consistent air/fuel ratios at any elevation or temperature) Accepts all modern stock throttle cables Single circuit design (NO Jets!) Set it and forget it! Other Features Zero fuel spillage (internally vented, sealed system) Reduced emissions (30-50% reduction) Premium billet construction Designed and manufactured in the USA   New orders are currently shipping within 2-4 weeks from the order date, as EACH CARB IS BUILT TO YOUR SPECS. PLEASE TELL US YOUR CC, MOTOR TYPE, ESTIMATED HP, AND MAX RPM IN THE NOTES OR VIA OUR APP, WE CANNOT BUILD IT UNTIL YOU TELL US THESE REQUIREMENTS