Why is my Aprilia Falco’s clutch slipping?
My 2005 Aprilia SL1000 Falco’s clutch is slipping once the engine gets up to the upper limits of its operating temperature at 93 degrees. When the bike is first ridden or after a run the clutch is fine, but get into stop-start traffic and very quickly the clutch slips to the point it is almost unrideable. I have recently replaced the lever and master cylinder and bled the clutch with no change. John Tappenden, email
Answered by Griff Woolley, Aprilia Performance Check for freeplay in that new clutch lever and back it off if necessary. You should have transferred the clutch actuator pin from the old lever to the new one, especially if you are fitting a pattern lever that might have slightly different dimensions. It’s also really easy for the lever pin to catch the rubber boot where it meets the master cylinder. If the clutch springs’ free length is less than 43mm they need replacing and a recent oil change could be a factor as I’ve found that some fully synthetic oils can cause clutch slip. I use Morris Sport 4 semi-synthetic in 10w/40 or 15w/50.
Fully synthetic oils can cause clutch slip