RB Products Carb High Speed Needle Holder 1250-7/8 (Old Style)

RB Products and Novarossi's older high-speed needle holder, found on engines like the Novarossi C-Series, and the RB Concepts with 1250-7/8 Carb.  The newer design primarily differ in their method of retention and adjustment. The new version features a more secure and precise clamping mechanism for the high-speed needle.  

Identification: The new style is easily recognizable by the larger slotted head, which is also used for adjusting the mid-range fuel mixture.

When replacing a needle holder, it is important to ensure compatibility. RB Concepts and Novarossi engines have evolved, older carburetors are not always compatible with the new-style needle holders. Always check the specific part numbers for your engine to confirm compatibility. If you are unsure, consulting the engine manual.