Bombus Speedshop

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

Saturday, April 25, 2015

TPS vs Tecalemit Jackson throttle body

When brackets and all adaptation was done to the vintage Tecalemit Jackson throttle body I had to do some testing of the complete unit and it looked like this.
The vintage TJ throttlebody was now brought in to the new century !!



Shine

When the brackets for the throttbody was done I thought they deserved some shine and rust protection. Some Zinc plating gave the final touch.

Shiny brackets worthy a throttlebody 

Throttle arrangement

To have a hardware adjusted idle and a good enough return spring something had to be made.
I took the return spring from a Buell throttlebody I had in the shop. But first I made a nylon bushing for the spring and shaft and then a bracket to hold the idle screw and stop screw for throttle travel.
Many templates of both cardboard and Pepsi can was made before I started with the real pieces. But soon enough I had some pieces I was satisfied with so I just welded them with the TIG. Drill holes, tap and some screws, some grinding and I had a throttle arrangement.

Buell return spring and home made bushing

Template time for the bracket

Bracket in the works

Welded and ready for some cosmetic grinding
( Yes, I was LOW on gas that day)

Final bracket

TPS

To get the throttlebody in to the new millennium a Throttle Position Sensor, TPS was required. I had a Buell throttle body with a TPS in the shop already so why not use that one. First I made a bracket to fit the TPS to the throttlebody. Then it was time to adapt the shaft to fit the TPS.
A hole had to be drilled dead center of the shaft to accept a small pin to turn the TPS. And finally a new connector was attached to the TPS.

The bracket

TPS test fitted

The drilled shaft

Dead center
Not to shabby consider I did it with a low buck asian drillpress.

New connector on the TPS

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.