I fitted a DR 177 kit on a VBB150. A PX200 air filter, SI 24 carb, with SIP road exhaust came with the kit (part no.10105000). Also fitted with e-ignition kit part no.50015000. The bike fires up easily but is cutting out when driven a very short distance, but will run ok when the air filter is removed. The air mixture screw is set at around 1.5 to 2 turns out. Can you suggest reasons for this? Also should the air mixture setting be adjusted?? Any help would be appreciated.