Barrel and Piston - Big Bore Kit - Benelli 491 50 ST AC (Minarelli engine) 1999

Bore Size 47mm for 70cc, Contains gudgeon pin, circlips, head and base gaskets and Bigger ports. DOES NOT CONTAIN CYLINDER HEAD. PLEASE ORDER SEPARATELY. Our product code: AH2842 Carburettor may need rejet to get the best from Kit. *Please note* Increased Performance can put additional strain on aged components. Licensing , Registration and Insurance may be affected (depending on country).