Yamaha sells what they call a motorcycle adaptor kit through Kent Moore
tools, their chosen special tools manufacturer. It consists of 4 individual
braided SS lines all connected at a terminal block with a valve for each line
so each cylinder can be turned on and off individually. It includes the four
adaptors that screw into the exhaust head pipes where the 6 MM bolts
currently reside. The problem is, the kit is over $400 US dollars. The SS
hoses are $75 each by themselves. You can purchase the adaptors that screw
into the pipes separately, but then you have to find a way to connect the
sampling hose to them. There are two drawbacks to that, first, the male
threads exposed on the adaptor are big, somewhere in the 12 to 14 mm diameter
range. The second problem is these get HOT. Hot enough to melt rubber, so a
direct connection is not going to live very long. Since you are at it,
remember to have your carb sticks or similar vacuum sensing devices connected
because you want to constantly monitor engine RPM, oil temp and Sync while
making CO adjustments.
Good luck.
RSRBOB
