From my feeble understanding the sprag clutch is on the other end of the starter motor and is the the link to the engine - problems with the clutch can appear to be battery / starter motor faults but are actually down to the 'mini' clutch.
I thought that the spragg clutch was different to the "norm" in that it made the gear change smoother due to the instant pick up of the fly wheel...it is actually used on Gym equipment at our school and Nelly showed me a new one ages ago...(could be wrong though and the terminology is probably completely incorrect AND I'm sure someone will be along to put me straight ...After all I have a head like a sieve and I am a woman!)
To change the sprag clutch you need to pull the lhs engine casing and remove the generator/flywheel assembly. It's not that difficult, but you will need a puller of sorts to remove the cover and a tool to hold the alternator rotor. Also, check the driven gear where the sprag bearing runs. If that's worn, the new bearing will wear out pretty sharpish.
Lisa..................another blonde moment me thinks
Frank, if the bearing itself is starting to fail, then it could damage the contact surface of the driven gear. The sprag bearing isn't cheap, but the driven gear is even more. About £140 if I remember right.........
Hi Frank Im sure there's a web site that tells you how to change the sprag just type (sprag clutch) on your search engine. I remember looking at the site when I had problems.