Designed to improve throttle response and reduce lean conditions in the power band, our Fuel Line Return Restrictor is installed into the fuel return line between carburetors and the fuel tank, restricting the fuel return rate, and increasing pressure to carburetors. Precision-machined billet restrictor is threaded to accept a Mikuni Main Jet (not included) to match your application. For use with OEM and aftermarket carburetors using 1/4" fuel line. 

Recommended Main Jets:

• Stock Carbs for 1200 PV (66V)/: 105
• Novi Carbs for 1200 PV (66V): 100~120
• Novi Carbs for 701 (61X): 100~120
• RIVA Single Power Bomb for 701 (62T): 60