Breaking throttle cables

That's a new one on me, Bernie.  Did you add the strong springs due to the carbs not returning to idle?  I had that problem for quite a while until I discovered the the nut on the end of the throttle shaft (as opposed to the nut behind the wheel) was just a hair too tight.  I loosened them both by one flat and that solved the problem without adding springs.  Just a thought.

Have you checked that the end of travel position on the pedal coincides with the wide open throttle position?  If the carb linkage hits the WOT stop before the pedal stops you will have enough force with your foot to break the throttle cable after a short period of use.  In other words, the carb stop should not be what is stopping the pedal from going all the way to the floor.  This causes excess stress on the throttle cable.

Also, make sure that the tube for the cable and the pedal are aligned.  If the tube is bent or the pedal assembly is worn, the cable can be pulled against the tube and damaged from the misalignment.

I think James may be onto something here. You really need a pedal stop of some kind, you can twist the throttle shafts if not set right. You need 2 people for this, doesn't take long.

HA! Sounds like you have a lead foot! 

Yes they do make a heavier throttle cable. As James stated above first and Lane's comment about the carb return (no springs needed) being properly adjusted.

Thanks all.

Aah yes I need to check the open throttle and pedal. This maybe the problem as I’m trying to push the pedal to far down - yes Leadfoot!! 

Ill get my workshop to work to check both are adjusted - full throttle and pedalalready to the floor.

thanks again.  

My next change will be to 356 headlights ! 

@BMK - Bernie cruising in Australia just need a big motor so you don’t need too much cable to get the Speed up 👍😎

One way to check for the problem I spoke of is to disconnect the linkage altogether and use both hands to rev the carbs, seeing where it returns to.  Once it’s settlrd on a speed, then press on each throttle, um, thingie to see if you can lower the idle a bit.  If that works, at least one carb is binding.

Tnx yes I’m at 2200cc now with full Scat engine and Webber’s 

Yrs maybe the problem I’m pushing too hard