Hi does anyone now if the polini right hand exhaust listed on this site (part number 20020550) needs to be modified to fit on a pk125. The exhaust manifold studs are different on the 50 but the text suggests uprating the barrel see below
SIP TIP: Adjustment of carburetor jets is a must, 75-130 cc tuning cylinder, SHB 19-24 mm carburetor, longer transmission and reinforced clutch, PK XL clutch recommended.