These mercury-free carb sticks from Motion Pro are the industry standard for carburetor or throttle body sych. They are suitable for 2 or 4 cylinder bikes, and include hoses, brass attachment rods for the intake manifolds, and instructions. This new form of sticks no longer uses Mercury. Included are both 5mm and 6mm manifold screw-in attachments.
NOTE1: This item costs a few more dollars to ship due to the 24 inch length of the product.