Pre Unit Triumph Kibblewhite Black Diamond valve/guide kit


Pre Unit Black Diamond valve and guide kit
Kibblewhite Black Diamond™ valves are the best you can get for your Triumph motorcycle.
Now they are available for Pre Unit Triumph 650 and early Unit 650 heads!
These specially impregnated forged stainless valves have proven to have superior wear resistance and reduced friction than that of hard chromium or electrolysis nickel plating. When used with these C630 bronze guides and properly installed and finished, much tighter tolerances than factory can be used successfully for quieter operation, less friction, and much longer service life.

This set consists of 2pc 1.500" intake valves, 2pc 1.343" exhaust valves, and 4pc standard .5010" guides.

If you are building a Pre Unit Triumph 650 or 500 or need to rebuild a head, these are the highest quality parts you can use. We ship worldwide and will answer any questions you may have that are not covered in the installation notes.
Intake valve
head diameter 1.500"
Stem diameter 0.3105"
tulip 1.4"R
length 3.790"
Exhaust valve
head diameter 1.440"
Stem diameter 0.3100"
tulip 15ºR
length 3.775"

Intake/Exhaust guide (see above diagram)
A 0.460"
B 0.610"
C 0.840"
D 1.390"
E 0.680"
F 0.3100"

# 70-3310 OR E3310 ( V137 )
# 70-3927 OR E3927 ( V138 )

For manganese bronze guides, please use the drop down menu below.
Oversize guides are available at no additional cost.