Please look at the image to your left. On your right
are the stock half rings that hold the closer shims in
place. On the left you can see the MBP Collets and how
they differ. There is NO MODIFICATION required to
install the collets. Most folks install them when they
do a valve adjust....
Below is another
representation of the stock half rings and the MBP Collets.
Notice that the stock half rings are round, and although
they set in a rounded notch in the valve, the hole they sit
in on the shim is square! The MBP Collets not only
precisely fit into the given area, but the extra height
keeps them in place better.
The most common problem
with your valve going 'out of adjustment' is simply put,
poor design and consequent destruction of the stock half
rings. It is not uncommon to pull them out and they
are twisted, flattened, or even halfway out of their place!
Ducati now recommends replacing the half rings at each valve
Bevel drives should be
checked each 3K miles and pantah each 6K miles - with the
MBP Collets installed you can push the service out to 20K
miles... Spend a little now, save alot in the long