I have a 1975 Yamaha DT 250. It's a 2-stroke but uses a separate oil pump and reservoir. My oil pump no longer works so I'm removing it and going with pre-mix. The problem is the throttle cable "Y"s out with one end going to the carb and the other end to the oil pump. Is it possible to replace this cable with a single cable that goes only to the carb? Anybody know the model of bike I'd have to strip that cable from?