Part: TM Series Flat Slide Carburetor Mikuni TM40-6 Applications Product Description. TM Series flat side carburetors provide a significant performance improvements over older round slide carburetors.Air flows faster, smoother through the TM Series venturi and jet blocks due to the flat slide design which help create a smooth bore effect. The high velocity air flow means a stronger vacuum at the needle jet for more precise metering, better throttle response. The item "TM Series Flat Slide Carburetor Mikuni TM40-6" is in sale since Saturday, October 15, 2016. This item is in the category "eBay Motors\Parts & Accessories\Motorcycle Parts\Air Intake & Fuel Delivery\Carburetors & Parts". The seller is "jawzys" and is located in Hinckley, Ohio. This item can be shipped worldwide.