I have a high mileage (80,000) 1992 model. For the last 20,000 first gear selection has not felt positive and sometimes required a second attempt. In the last week the problem has become much worse - now virtually every time I select first I need to have a second, third or fourth go at it. This problems happens both when underway or when selecting from stopped. I am about to split the cases to look for the problem. I'm reasnobly experienced at working on bikes but don't have much specific experience of gearbox problems. I am currently guessing I will find damaged selector forks. Does anyone have any other suggestions on what the problem might be and what I should look for. Also any specific advice and comments on splitting the motor from someone who has done it will be welcome (I have the Kawasaki manual but whilst it is technically great it does not provide a great deal of guidance on what to look for).