It's an Excel spreadsheet adapted from a car racing transmission. The formulas are embedded and allow you to change ratios and tire diameter and it will automatically calculate speeds in gears. I couldn't post the Excel spreadheet - board rules wouldn't allow it so I printed it, scanned it and saved as JPG so I could post.
I have no clue what redline is for the M50 twin but it feels wound pretty tight at about 7000 rpm.