XJ900 Seca undertank air scoops. Reproduction questions??

The search for the virtually unobtainium undertank air scoops was a success. I now have a pair of these plastic air scoops that mount below the fuel tank.

I know that there are other bikes out there that do not have these pieces. I would like to use these parts in an effort to make reproduction pieces for those that have not been able to locate them.

I have already talked with FlyGP, and he is willing to make a solidworks cad model of these parts. This can then be used to create the necessary programing to have these parts cnc'ed.

I would like to get oppinions on what method of reproduction would be best.

Your input is greatly appreciated
Ghost

 

I have no idea what material would be best but would like to put my hand up for a set when available,actually 2 sets.
Please!

 

Injection Molding.
Multi-part.
Slide and snap together.

A Triangular-shaped "Boat" --> External section.
Slide-in and "Click-to-lock" Air deflection shelves.

Wuth the Main Section ... Injection Molded ... the two Mounting Points can be included on the External Triangular-shaped section ... with that section ... having LOCATING Channels for the Air Deflectors.

 

How are the originals made, are they an "assemblage" as Rick suggests?

What are they made of?

We're in the epicenter of automotive tier two and tier three suppliers here in SE Michigan; plastic molding companies abound. It's worth exploring how much it would cost.

 

gunnabuild1:
You are the exact reason why I would like to do this. I know how hard these are to locate, and it was pure chance with a lot of luck that I was able to find this set. I already know of several bikes that need them. Will add you to the list.

Rick, Fitz:
Injection molding appears to be the process that is used originally. The parting line of the mold is clearly visible on the mounting pins. It looks to be a three part mold (2 inner, 1 outer) for the outside shell. The inner air deflectors are a simple molded channel, and attached by rivets along the bottom edge.

There are actually 3 mounting points (2 pins, 1 screw) that attach the part to the fuel tank, and frame. They are made of a black plastic material, and painted on the external face.

My thoughts exactly! While obviously it will be a limited demand item. It is one of those details that make the finished bike complete. Once the molds are made they could easily be made in batch run quantities.

Ghost

 

Re: XJ900 Seca undertank air scoops. Reproduction questions?

ive got a pretty good pair that are available for sale...

theyre attached to a very nice example of an 83 xj900r...

yours for the taking, only $2500...

 

The OEM Scoop is a Plastic Outer Shell that is Injection Molded in Gray.

The Deflection Spoilers are a Composite Material somewhere between Cardboard and Fiberglas.

Even if you were to sell two Pair to everybody who has a running bike or is restoring one of the few left around, ... I doubt they could be made and sold at a price reasonable enough to break-even.

 

Or if your handy with aluminum, one could fabricate a very nice set

 

Another option that i have thought about is making them out of cabon fiber composite, or gelcoat fiberglass

Fiberglass molds (easy enough to make, and not that expensive)
Replica, not reproduction (minimizes legal concerns)
Made to order. Instead of batch run quantities (Lower initial investment, Lower overall cost)

Any input on this??

Ghost

 

Necro-thread.
I'm surprised nobody's (to the best of my knowledge) knocked some up with a 3-d printer these days.
Items like that are what it's for.
The absence of them on mine doesn't bother me in the slightest, but if they were available cheaply I might fit a set.

 

I would love to see a picture of them.
I know the 650 turbo had some funky bits like this but never the less I don't have a visual image in my brain.
Pics! if anyone can stick a couple in that would be cool.

 

The turbo ones were catching and directing air at the inlet end of the head - obviously in a bid to keep charge temperatures down. I've never looked closely at the 900 ones, but yamaha weren't doing this for show...

 

Individual parts of a set that sold on Ebay, but would be better to see pic mounted on bike.

https://www.ebay.com/itm/1983-Yamaha-Seca-XJ-900-Ram-Air-Intake-Scoop-1922-/373272480582?hash=item56e8c60b46:g:rTkAAOSwkt9fhkrn&vxp=mtr&nma=true&si=o4FGw9tVxXJkWEWD0VYP8iCP2tw%3D&orig_cvip=true&nordt=true&rt=nc&_trksid=p2047675.l2557