Accelerator Cable for Dual Carbs ? Options

[cary]

In putting Mark's engine back in and replacing the broken accelerator cable. It seems the cable isn't quite long enough to work/fit correctly. In the FI arrangement the cable crosses the engine at 45 degrees. In dual carbs it needs to come at the bar at 90 degrees. Which pulls the bowden out of the firewall. Which will allow water down the cable tube.

What have others done to work around this ?

[Darren C]

Ok Aaron,

Lets look at what I wrote and what you replied….

1, To be frank... You have no idea what you are talking about.

You are perfectly entitled to your opinion I respect that, so let me answer.

2. The throttle levers stay on and are "pinned" to the pulleys.

I wrote, you take off the weber levers with a QUESTION mark as I was NOT 100% certain.
I wrote that in my opinion it was over engineered. Pinning pulleys to levers is over engineering. Like the bracketry to the carbs it's lazy engineering to have all those slotted holes and even more lazy to fit a pulley to a spindle instead of a lever, then leave the lever on and pin a pulley to that. The lever is only held on with one nut for heavens sake. Your point has totally confirmed my observation that its bad engineering.

3, The cable connecting the master to the slave is ideal as it doesn't change with heat or expansion. Once the slack is taken out you are more or less done.

A cable between master and slave I wrote “you’re totally reliant upon Carb B’s return spring to keep the cable tension” this is ok until a spring breaks. It is not fail safe like a solid rod linkage.

4, All the standard springs for the carbs stay in place, so you are no better or worse than with a linkage. If one carb hangs open with either system you have a potential problem.

We agree believe it or not. This is my point entirely because its a cable between A & B if any carb hangs open or its return spring breaks (carb B) you have a potential problem. Any throttle linkage needs to be intrinsically safe. This is why a fully cable system is not a good idea.


5, This setup is WAY smoother than my PERFECT CB hexbar set up. My balance and feel is perfect with this setup. Something I could never achieve no matter what I did with a hexbar setup.

Again I never said this set up wasn’t smooth, I never said it wasn’t better than the hex set up for smoothness or feel or ease of set up. I said it was worse only in its inability to fail safe as in point 4 that we both agree on. We both know the Hex bar system is poor.

I race the stuff Chris builds and appreciate his engineering greatly. Not a fan boy, just a user.

I understand fully that I’m against fans and friends of Chris or whoever makes whichever linkage. I have constantly maintained that I am not interested in the people behind these linkages, only to point out as an engineer, the areas in which these linkages can be improved for the benefit of all.

Again Arron I respectfully ask those of you who have issues with my observations to take a little time to read into and understand what I’m saying here rather than shoot me down based upon your interpretation of what you think I’m saying.