> >  Yama-seal and a generic version can be found at cycle shops, I

 > > believe this is a urethane based sealer.
 > >   I don't like the idea of the sandwich mount as I have fought oil pan
 > > leaks and the thought of mount sandwiched between it
 > sounds like more
 > > leaks.
 > >   Also I have found it best to run without a gasket.
 > >
 > >   Ken Welter

 Ken, The product you are referring to is called YamaBond. Kawasaki
 and Honda also have a similar product. The item is CASE sealer. The
 motorcycle engine/transmission cases are split on centers. The case
 seal is an excellent product for good FLAT (read machined or lapped)
 surfaces. The only problem is that this stuff sets up. Unlike silicone
 sealers the case bond needs the items to be put together within about
 1 minute. This isn't a real problem but the parts need to be ready
 to go. This stuff lasts a long time too. I have used tons of this stuff.
 It is hard to get off, (clean) and the parts are often nearly glued
 together. The motorcycle engines often have jacking bolts to pull
 the case apart again. Good for the upper pan/mount. Bill Jepson

  Yes I think you are right, put YamaBond on the upper half and use
Ultra blue on the lower half.
  All I have been using is the Ultra blue and I goop it on heavy
without any worry as the excess that goes inside sets up and will not
flake off and I have never found any in the oil screen.

  Ken

 
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