There is a tapered, wedge affair that gets tight when you tighten the screw. Loosened the screw quite a bit then tap it in. This will disengage the taper and you shoud be able to withdraw the keeper inside the bar. If possible, after the screw is loose reach inside the bar with a screw driver and pry directly on the keeper. If you pull out on the screw it has the same effect as tightening it and will make it hard to get out.
A forum community dedicated to Triumph Motorcycle owners and enthusiasts. Come join the discussion about performance, racing, cafe racers, bobbers, riding, modifications, troubleshooting, maintenance, and more!