Due to constant problems with my original MA18BS5 I'm going to replace with a PHBL 25. My question is what would be a good start for jets to start the tuning process ? There is a good guide at Cam Lam but it only really aligns the PHBL to upgrade kits not really to stock engines. (Engine is standard Li125 S 2 but with clubman exhaust)
Link bellow, any help welcomed,
www.lambretta.co.uk/downloads/carbjetting.html