Bolt in the bottom of the forks. Which part number?


Information and questions on GL1100 Goldwings (1980-1983)
Post Reply
bofler
Posts: 123
Joined: Thu Aug 22, 2019 9:09 pm
Location: Fort Scott, KS
Motorcycle: 1983 GL1100I

Bolt in the bottom of the forks. Which part number?

Post by bofler »



A bit confused by the parts diagram. What's the number for the allen bolt that goes in the very bottom of the forks? Thinking it's 57 (and 60 for the washer that goes with it), but not super clear in the diagram. *Sub-question: Seems like it's probably an M8 bolt that's 27mm long. Anyone use a non-Honda bolt here? I can find 25mm and 30mm lengths at Home Depot. Just don't really want to put in another parts order for such tiny things, but also don't want to do something terribly risky with the forks.
Attachments




User avatar
Wilcoy02
Posts: 1212
Joined: Sun Nov 21, 2010 11:37 pm
Location: Marengo, Ohio
Motorcycle: 1983 GL1100 I purchased 3/16

1983 GL1100I frame with an 80 engine. poor boy installed with C-5 ignition--DIED in Grande Prairie Alberta Canada 8/15


98 valkyrie sold 8/16

Re: Bolt in the bottom of the forks. Which part number?

Post by Wilcoy02 »

From my parts catalog you seem to be correct. #57 is Bolt, socket, 8mm (showa) Part # 90116-383-721
#60 is washer, special, 8mm 90544-283-000
User avatar
OldguyGlen
Posts: 227
Joined: Sat Nov 24, 2018 10:55 am
Location: Mound,MN
Motorcycle: 1980 GL1100 STD/Vetters
1966 Honda 90

Re: Bolt in the bottom of the forks. Which part number?

Post by OldguyGlen »

Assume the original is damaged, or lost, otherwise just reuse it.
Local hardware or Home Depot are good sources for many metric bolts and machine screws, and O-rings. Sometimes the heads are slightly different diameter or surface finish than the original, but work just fine. Take the original with you to compare. Don't worry about 25mm vs 27 mm length. This bolt is mostly just a plug... it suffers no serious mechanical stress.
bofler
Posts: 123
Joined: Thu Aug 22, 2019 9:09 pm
Location: Fort Scott, KS
Motorcycle: 1983 GL1100I

Re: Bolt in the bottom of the forks. Which part number?

Post by bofler »

Well, got one of the bolts out. The other one was superbly rounded off by someone before me and I'll have to extract it or drill it out. And the bolt that came out was neither stock from Honda, nor was it 27mm long like a stock bolt. I bought a 25mm long hardware store bolt for 88 cents and it is longer than what was in there. Also, looks like the previous genius mechanic who installed this bolt (and probably rounded out the other one) used some gasket sealer from a tube rather than a copper crush washer. Guess it worked well enough because I got 10k miles out of it. And the previous owner probably put at least as many miles on that hack job.
User avatar
OldguyGlen
Posts: 227
Joined: Sat Nov 24, 2018 10:55 am
Location: Mound,MN
Motorcycle: 1980 GL1100 STD/Vetters
1966 Honda 90

Re: Bolt in the bottom of the forks. Which part number?

Post by OldguyGlen »

The socket head metric are often abused. A lot of American DIY guys don't own a metric Allen wrench set, so they round 'em out with an English size. Google Goldwing fork drain bolt. There is a thread that describes a method of cleaning out the socket with a drill bit, then using an easyout to extract the bolt. Good luck.


Post Reply