A puzzle for those who know the S'wing really well.

Checking underneath while cleaning wheels, tires and tupperware I found
the bolt in the picture.  It is a flanged bolt with a shoulder (not visible in the pic) beneath the flange.

It was hung up in the grill-work (parallel to the ground) beneath the plastic
grill-work in front of the radiator.  The head was too big for it to fall
through and I removed it by taking it up and though the grill-work in
front of the radiator.  The thread is 5mm x 10mm lg with a shoulder of
5/16" dia X ~3.5 mm thick.  Guess I'll have to take the cowling off to try
to find a hole longing for a missing bolt.  I certainly couldn't see where this
may belong by looking up from below.  

What are the chances that it doesn't even belong with the bike and just fell in through the grill in front of the radiator? 

Just thought that there may be some forum followers who can take a Silver Wing apart in their sleep; that may just know where this bolt may go if in fact it is Honda related.  Maybe there isn't a bolt of this description in the front sections of a S'Wing anyway.  For peace of mind I can see a dis-assembly of plastic in my future.

Thanks for any input.
Mike

It is possibly a bolt that holds the front cover on. I'm not sure what year but on my 08 I have a collar with a special bolt that holds the front cover on, but I have seen a bolt that looked like the one in your picture on a friends Silverwing. The collar on mine or the shoulder on the bolt my friend had fit in a rubber washer type thing. This is just a guess I'm not sure.

Thanks Roger.  Mine is an '05.  I'll take a close look at the front cover.  Can you direct me where to look?  There has been a buzzing vibration and thought this may have been the windshield.  This bike (or any bike) is new to me so it is all a learning curve I'm on.
Mike

EDIT: Looking here: http://www.partzilla.com/parts/search/Honda/Scooter/2005/FSC600D+AC/FRONT+COVER/parts.html

I wonder if part # 18 of the sketch is what you have in mind Roger. This bolt isn't mentioned in the parts' list.

Mike

The shoulder bolts that attach the front cover to the frame are 'button head' allen head bolts. They are button head so that they clear the windshield garnish. This bolt looks like it could be one of the sub-frame bolts. Like #33 in the illustration.

Tim

Cosmic_Jumper could be right. I forgot the mounting bolts are allen head bolts.
See I said I was guessing.

Have a look at the underside of your saddle. It looks like the bolts that secure the bum-stop bars.

Looks very much like the bolt that secures the brake pipe clamp to the steering yolk (triple tree) to me,or possibly the one that holds the coolant filler in place (under right hand glovebox),with the coolant mounting bolt loose/missing you could well get vibration noise from the windscreen area

Service manual page 2-21 ,under cover shows 2 bolts securing the cover to the frame ,bolts are located by the vent opening . Look there or under the floor mat before removing the cowling.

I had a pretty good look for holes missing a bolt this morning.  Can't see any so far.  The coolant reservoir bolts are in place.  Couldn't get a look at the "brake pipe clamp to the steering yolk" area. I had the floor mats off and the lower cover on the right side (the bolt was on the grill-work on the right side) and all bolts seem to be present.  Did a lot of looking though the coolant access "hole" - right side glove box removed. I did manage to get removed parts back in place !  I plan to build a shed for the bike next summer and after crawling on the ground today I hope to include some means to raise the bike for easier working conditions.

I'm beginning to think that it isn't a Honda bolt because of the flange being domed and I haven't seen any shoulder bolts on the part dwg's so far.  It likely has been hanging out in the grill for some some - the threads are rusty.  In the spring I'll take off more plastic and search farther.  Here is another picture.  Thanks for your input and help with this puzzle.   Mike

Better picture there bud ignore my earlier suggestions,that is deffo for holding a plastic item,the shoulder under the washer is to prevent over tightening & crushing the component

Just one more thought. One of the three BOLT-WASHER (6X16)
90120-KCR-003 that hold the fan shroud on to the radiator.

Thanks Dennis.  I looked at those today.  Those and the 3 holding the fan motor in place are there.

Thanks, "The Bern".  I wanted to try to show the shoulder and the rusty threads better than the first picture.  Now I will work on the focus   !  .  It has been out in the weather a while.  Like you say .. the shoulder pretty well makes it a bolt for securing plastic.  I was thinking it may be for the head-light assembly -- and will get a look at that area next time.   But then, I don't think a bolt from there would fall to the lower grill. Will look anyway! That isn't a loose washer  (if this is what you may be thinking) but rather a domed flange as part of the bolt.

I'm starting to think this bolt was either dropped and replaced rather than fished out or it was kicked up off the road somewhere ...long, long ago - based on the rust.

All the comments are appreciated !
Mike

Looks like part #9 in the following drawing.
http://www.partzilla.com/parts/search/Honda/Scooter/2002/FSC600+AC/HEADLIGHT/parts.html

I just happen to have my front end (cover) off this evening, and I confirm that #9 sure looks to be the part in the photo.

Unfortunately, unless it is one of the top two headlight assembly mount bolts you're not going to confirm that until you remove the front cover. You can see the threads of the top two bolts facing forward when you remove the windshield garnish.

Tim

I believe part #9 has a very coarse thread, made to thread itself into the plastic bosses on the front cover. The shop I use to work on my scooter has a Silverwing with the front cover off right now. I will try to get over there tomorrow and see if I can figure out where or if it came off the front cover.

That's the one I want to look at on the scooter, Wayne ... # 9.  But it looks like a longer screw from the sketch than my "found" one.  Thanks Wayne and thanks to Roger & Tim too.  Here's a picture of the screw balanced on the end of a pop rivet on a scale in an attempt to give some dimensions to it.  Measuring with a vernier, the thread dia is 6mm, length is 10mm. The shoulder dia is 8.5mm ( ... or 5/16"), shoulder height about 4mm, flange dia is 5/8".  As you can see the thread isn't coarse.  The total bolt length is 20mm.  The scale in the picture is a 1" scale divided in 1/10 markings.


I'll take off the windshield garnish and have a look ... reporting back later today. I appreciate the international assistance on this puzzle. 

Mike

Is there a prize for the correct answer?

Colin B wrote:

Is there a prize for the correct answer?

Just helping a fellow rider is enough for me... Aloha all.