Well i got an adapter from cambs trials, and although it is longer, it still doesnt seem like it is right. The carb has to removed from the engine, forced into the airbox which took a good 30minutes and a lot of swearing, then the carb has to be reconnected back onto the engine. This worked, and so far it has held, but I can't help but think that something isn't right. It's just all at the wrong angle - the angle the carb intake sits at is about 20degrees off what the air filter naturally sits at, so when connected everything is under constant force trying to part them.