Terry Thanks for the info on this. I was going to use some of the stainless replacement hex screws taht I replaced the anti tamper screws with but as I still have the anti tamper ones I might as well use them. It would be a pain for me to counter bore for the O ring seat due to my limited resources. I have a drill press but surely I would need a flat bottomed cutter like on a milling machine? Which is why I was going to use the flat on the casting as a sealing surface. Regards Steve ------------------------------ Date: Sat, 1 Apr 2000 21:43:18 EST From: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Subject: Fork Drains Message-ID: <[EMAIL PROTECTED]> 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] ------------------------------ ===== Steve "Shifty" Gill VMOA #722 Surrey - England - UK 99 "MEGA MAX" Black Metalflake __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com ............................................. To unsubscribe go to http://www.sayegh.org/unsubscribe.htm .............................................
