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Author Topic: Fiberglass fairing mountings  (Read 362 times)

Offline Ryan Stecken

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Fiberglass fairing mountings
« on: May 04, 2018, 10:41:23 »
Hey guys!

So iŽve been playing around since I mounted a windstopper on my fat old lady (XS 750) that I want to modify and mount a fiberglass fairing that I bought a few years ago for my Yamaha RD project.
Started playing around in Photoshop.
How do I mount these fairings properly (vibration wise)?
Do you guys have any pics of your fairing mounts?

Cheers
and Thanks in advance!

Offline pacomotorstuff

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Re: Fiberglass fairing mountings
« Reply #1 on: May 07, 2018, 08:08:48 »
Some fairing mounts, different mfgs.
Pat.

Offline Ryan Stecken

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Re: Fiberglass fairing mountings
« Reply #2 on: May 08, 2018, 07:31:28 »
Thanks pat for the pics!
Could you send me more detailed pictures of the mounts that hold the fiberglass?
Do you use any kind of rubber grommet to mount them?

Thanks!

Offline pacomotorstuff

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Re: Fiberglass fairing mountings
« Reply #3 on: May 08, 2018, 08:00:24 »
Rubber cushioning of some sort is good.
The TZ's had a hard rubber insert at the nose with a threaded metal insert, so acted like a bushing.
The side / rear fairing mounts were a nylon type material, which was threaded part way for the bolt to come through.  The other end was hollow and fitted on the frame mounts like a sleeve, held on by "J" clips.
The Rickmans had rubber cushions in various places, but their mounts are quite a bit different than a race fairing.
The trick with any fairing mount is to spread the load as much as possible, so a fairly big washer / big head fastener (Yamaha among others had a special part number screw, M6 I think, with a larger than normal head).
You can get some ideas by looking at the cmsnl.com website - probably any TZ page will do and also the Meadspeed website www.meadspeed.com has some replica fairing cushion mounts available.  Pricey but gives you some ideas for fabrication (or just shoot the wad and order them LOL).  If you hunted around some of the industrial suppliers, you might be able to find something similar that could be adapted.
Hope the above helps.
Good luck with your project,
Pat

Offline kdsmf

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Re: Fiberglass fairing mountings
« Reply #4 on: May 19, 2018, 17:45:43 »
Any where is bolted you should use bushing to avoid cracking.  https://www.motosport.com/lockhart-phillips-body-bushing-kit?redirect=1

Offline jpmobius

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Re: Fiberglass fairing mountings
« Reply #5 on: May 19, 2018, 18:38:48 »
Any where is bolted you should use bushing to avoid cracking.  https://www.motosport.com/lockhart-phillips-body-bushing-kit?redirect=1
This is a good style of bushing.  The most important concept here is to have a center sleeve that your bolt can tighten down on, leaving the attached component (fairing in this case) captured only by the grip of the rubber grommet.  That way the fiberglass (aluminum, carbon, etc) is not crunched by the bolt no matter how tight it is, and for this reason I go for a metal sleeve.  It is also very important to make sure the mounting bracket is exactly perpendicular to the bore of the sleeve so that the bearing surface of the bracket rests uniformly on the inside face of the grommet, and the center sleeve is held aligned with the bore of the grommet.  It's also a good idea to place a washer larger in outside diameter than the hole in the fairing to both support the grommet on the outside face and also to keep the fairing from falling off if the grommet fails.  I have often made these from aluminum thick enough to countersink for a flat head screw.  I chuck them in a drill motor or lathe and chamfer the outside edge and the result is a pretty smooth low profile fastening that is easy to take apart.  I like nylon bolts, washers, and nuts for mounting windscreens, and aluminum rivets for semi-permanent parts like blisters or scoops.
Mobius


On a long enough timeline, the survival rate for everyone drops to zero.

1973 RD350 Yamaha build  http://www.dotheton.com/forum/index.php?topic=66498.0

Offline kdsmf

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Re: Fiberglass fairing mountings
« Reply #6 on: May 19, 2018, 18:47:35 »
Yeah, metal would be better but the plastic insert in the Lockharts work fine.

Online irk miller

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Re: Fiberglass fairing mountings
« Reply #7 on: May 19, 2018, 20:57:35 »
I've used speedy fasteners on windshields and fairings with great results.  The screw pulls a capture nut through the rubber flange and causes it to spread and grip the hole.