What size socket for engine oil drain plug?

[Adam R]

I don't have my manual with me and my tool kit just goes up to 19mm.  I'm guessing that it's a 21mm but I don't want to run to the hardware store and pick up the wrong size.

Adam

[Kerry]

Does the underseat toolkit come with a socket for that?  If noone else can give you a definitive answer right away, I can run out to the parking lot with my trusty ruler and find out.

[Adam R]

You know I don't have the tool kit either on me, I need to pull the plug to drill it for safety wiring for the track this weekend.  Kerry if you could check, that would be great - its smaller than a 22mm and bigger than a 19, so its either 21 or 20mm.


Adam

[Kerry]

In that case, I'm pretty sure it's a 21.  But I'll check ... in a bit.

[miket]

Yep, 21mm. See the oil change instructions either here on gstwins, or on my web page: http://www.angelfire.com/mt2/mikesgs500

[Kerry]

What do you know?  The drain plug on my '99 is 17mm.

I tried the 22mm and 19mm wrenches in my kit and they were both too big.  I measured with the ruler and came out right at 17mm.  I made sure that it wasn't 16 or 18.

What year is your bike?  Maybe we've discovered another difference in the '01+ models.  Or maybe, since I bought mine used, it had been swapped before I got it.

[Adam R]

Mine is a '91.  21mm fits, I just picked it up.

Adam

[sanityfree]

i thought mine was an 18mm. but i'm not sure anymore. i'll have to check it out again.

[Kerry]

Good idea.  I'll have to apply an actual socket to that plug before I'm satisfied....

[denman]

my 00 mod is a 17mm also.   i just went out and checked.  see ya.

[akh223]

my 2000 is also a 17mm plug.

Andy

[gsJack]

My 97 is 21mm and my 02 is 17mm so the change was between 97 and 02.  I've always used an old Snap-on deep wall 13/16" spark plug socket on the 97.  It fits the 21mm hex nice and snugly.

21mm/25.4=.826" and 13/16=.812"

The spark plugs are 18mm socket.

[Rollin668]

Not sure of the size, but the lugnut socket for my wife's Mazda MX6 wheels fits...



Rolly

[Kerry]

My 97 is 21mm and my 02 is 17mm so the change was between 97 and 02.

Jack's '97 has a 21mm bolt and my '99 has a 17mm bolt.

Anybody out there have the "missing link" - a '98 model?