I'm having that exact problem with my r33! any luck with fixing it? mine has been getting worse, dropping out more often and getting harder to 'flick' back up! I did find that pushing in the trip button on the speedo gets it working again too. i've pulled the cluster out and tightened screws, wires etc, but same issue always comes back. If anyone has any ideas on how to fix this would be great, very annoying problem!