Bombus Speedshop

Bombus Speedshop
Wrenchin' without supervision since the seventies...

Sunday, April 19, 2015

The seat

Another project this winter is a new seat.
Made the seat pan from scratch couple winters ago but the stroke and other projects have made this a low priority project.
But this winter it looks like the seat will be reality.
First some base shaping of the seatpan, then glue the foam to the pan, shape it and finally cover it.
Sounds easy and simple....in theory.
But everything is done besides cover it and it looks like this time I'm not doing it myself.
Hate to depend on others, like to do all my stuff by myself.
But this time it might be a exception.

Here is the raw seat pan I made from scratch with fiberglass and epoxy.

I had to modify the rear mount for clearance and I also put permanent metal threads for the mounting hardware.

Front mounting hardware

Shaped seat foam

I glued the foam to the pan and used tape to fixate when the glue cured.
Then some shaping and it turned out nice I think.
Ready for vinyl or leather cover.

Tuesday, April 7, 2015

Fuel system

The added fuel pump needs more stuff to distribute the yummy fossil fuel.
First some thinking about routing alternatives and for the regulator.
Than I had to buy quality hoses and a pressure regulator.
And after some routing of hoses and brackets it looked like this before the tank was installed.



Saturday, March 28, 2015

EFI cave

To solve the issue with a dry, safe place for all new electronic gadgets that comes with Electronic Fuel Injection something had to be done.
The non used greasy, dirty space under the seat became my target for this.
I had to fabricate a "front wall" and a "floor" to make it suitable.
The "floor" was needed to protect from the smudge from the chain and to mount the MAP sensor. The "front wall" to avoid engine heat and road dirt and to mount relays and fusebox.
The ECU found its place on the inside of the OEM plate for fuses and connectors.
Down in the bottom of the cable cave I fitted the fuel pump. The V shaped cross member between the frame rails was after some hard massage a perfect place for the fuel pump.
A very snug, but big enough place.
But more about the fuel pump/fuel system later.

Testfit of the ECU,  "floor" and "wall"

Fuel pump wired for test and plumbed ready 
to get some hose clamps and get mounted.

The gadgets in their final positions 
with the fuel pump in the bottom.  


The "cave" wired and pump running for the first time 




Wednesday, March 18, 2015

Noseart

It ain't just wrenching in the Speedshop, the eye also must have some attention. I have thought about a classic piece of "noseart" on the fairing for a long time. Was thinking of painting it but time went and nothing happened.
So it was time to realize that if I wanted the noseart I was dreaming about I had to seek help.
I made a rough sketch to get the proportions right then my friend Jimmy at Skylt & Gravyr Ateljén took over and made really great looking vinyls for me to attach.
The rough sketch



 Fresh from Skylt & Gravyr Ateljén


 And mounted on the FLT's mighty fairing

MAP sensor connection

Next part to get a ride in to the new century was the long vintage intake manifold. To handle petroleum/air mixture post Y2K there must be a air nipple to connect the hose from the MAP sensor (Manifold Absolute Pressure) in the manifold.
A dedicated spot in the manifold did the job easier.
The manifold ready for conversion

Followed by drilling and threading

And the final job ready to go back on the bike

A previous job to the manifold was exposed when it was dismounted. 
The top mounting thread was gone when I bought the old intake. 
I made a thick steel plate and bolted to the intake and then made a new thread all the way through both the new fresh steel and in to the vintage cast aluminum. 
So now the old intake can live on for many more years. 


Saturday, March 14, 2015

Injectors

The first modification of the throttle body was for the injectors.
It was originally attended for mechanical injectors so some machining had to be made to fit the new generation electronic injectors. These new injectors was kindly donated to me by Deep Valley Workshop. So after some drilling, milling and grinding they fitted like they was originally intended to fit the vintage little gem.

Throttlebody

A fairytale with so many stages.
This long petroleum supply story began when I first saw a picture of the amazing looking long intake for the Shovelhead. I instantly fell in love ! Then the almost never ending story with the Dellorto dominated my driving and Speedshop time. This money consuming project went from dream to almost a nightmare. After so much money and time I had a bike that didn't run under 2000 rpm and not over 3000 rpm. Driving it was truly a challenge.
Without all the help from Matt at Eurocarbs this have journey had been a disaster from day one but there I got help and comforting words and parts  many, many, many, many  times.
But the mighty Dellorto got the last word, the Dellorto(this?) don't want to feed a Harley engine, Period!!

Thoughts about EFI begun way before this nightmare, but really took off when I found a pair of vintage Tecalamite Jackson mechanical throttle bodies at eBay.
The nice thing with those throttle bodies is that they are direct replacement to Dellorto/Weber/Solex carbs and this solves many installation problems. And I can still keep the mighty look I fell in love with in the first place with this application.
And the saga begun for real when I opened the box...