Steve Gill wrote:
I intend to drill the fork drain holes and
use stainless hex screws and copper washers
to make future oil changes easier. What size
hole should I drill and tap?
Steve, I just did this mod on my 98 forks.
Stock drain bolts from pre 93 max are 4 mm and use an O-ring.(I think)
so
I chose to use the anti-tamper screws (Torx T-25) that I had removed
from the carb diaphragm covers. They are 5 mm dia. and
I used an O-ring with them. Tap drill size was 4.2 mm (#19)
Make sure threaded hole is deburred on inside.
In addition I counter bored that hole with an approximate
9 mm dia. (.339" Letter drill R) about 2 mm deep to keep
the O-ring contained.
CAUTION: Cut the screw to a length of no longer than.375"(9.5mm).
Any longer and it could be impacted by a bottomed out
fork tube.
This mod works very well.
Terry Sickeler
[EMAIL PROTECTED]
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