Neutral switch replacement

[OldRider2]

I'm going to replace the Neutral Switch in my 1977 GL1000 over the winter but it looks like I should replace O-ring for it as well. The original Part Number 91306-371-013 isn't available from most Honda places. I can find it as "cheap" as under $6 on ebay and other places to much higher at others. Is there a good source for this or do I bite the bullet and order one on eBay or go to a Napa place and start measuring a whole bunch of o-rings? Are there any parts stores that stock Metric sizes for o-rings?

By the way I was on Partzilla yesterday and any part has free shipping for 12/2 and 12/3/19

[rcmatt007]

I am pretty sure the neutral switch comes with an o-ring

[OldRider2]

Thanks RC. I just checked with Partzilla and the guy said it didn't come with one.

[rcmatt007]

I did look on chapomoto and they show it back ordered, so it may be close to not available, although one would think it is a pretty standard size

[Sidecar Bob]

Most of the "metric" o-rings on old Hondas are actually inch sizes converted to mm. The one you need is 17.7X2.7, which is the same as a 11/16" ID x 29/32" OD (you can probably use 15/16 OD).

[OldRider2]

Thanks Sidecar. I didn't realize the orings were US sizes converted to MM. I came up with the 11/16" converting the 17.7 mm but wasn't sure if that was the ID or OD. When the switch gets here I plan to go down to NAPA with a micrometer to see what they have that's close. Several years ago I had taken the differential off from my 1982 GL1100 and needed an oring so went to my local True Value, found one that was close and installed it and never remember having a problem afterwards.

[Sidecar Bob]

Honda always specifies the ID and wire (cross section). This has tripped up a few people over the years when they bought from suppliers that specify the OD and wire.
In fact, someone one CX500forum just posted that he ordered a couple of o-rings from Silver's using the Honda part number but instead of the usual bag with the Honda label on it they came in a plain plastic bag with the Honda number written on in marker and they were too small. Silver's told him they would send the correct item but I haven't heard if the replacements are correct yet.