Topic: Carburetor cable question! Can you make it a single cable pull?

[Tintop]

I've used dual return springs on many multi carb car setups.  Depending on a kill switch to save your butt is a joke.  Guy blew up a Twincam when the throttle pedal jammed.  He only had to move his finger 3" from the wheel to the kill switch.  Never did.

Part of any pre-ride check should be to turn the throttle to WOT and release.  Preferably in straight ahead / full left / full right lock.  If it doesn't snap shut instantly, you shouldn't be riding it.

[srook]

Kill switch or not, if your life depends on killing engine power to your rear wheel.........PULL THE CLUTCH!
I don't see why these threads get so heated.  Neither side is going to convince the other that the're wrong.  On an unrelated note, I am considering ditching the return spring all together and installing individual springs on the top of the slides like the earlier bikes.  I'm having an idle hover issue that is being caused by the slides not fully returning to their seats in some instances.  What I have found is that the single return spring with the rubber shroud can bind becuase of the shroud.  I took it off and saw instant improvement. 
BTW I run a single pull cable.
Scott

[754]

When you say internal throttle, is it using piano wire or regular cable??

 If you run other carbs ie Weber or the 2 Mikuni setups, the pull will be far lighter.. Also 77/78 750 carbs have 2 different slide, one may pull easier.. They used plated brass and abodized in those years.

 I do know of an inline wire throttle setup that is external, follows the bars, and is pretty clean looking, and perhaps earier to build. It was used on Whizzers, you can probably by them or make a cleaner version..

[Dr. Honda]

it uses a regular cable, its made for Harley for the most part. You cut off about 3 inches of the bars, and it attaches inside. There is a spiral machined tube that has bearings that ride in the spiral, when you twist the throttle it pulls the part inside the spiral tube toward the end of your bars which is attached to the cable that is routed through the bars.  I know you probably know how they work, but for those who don't, theres a rough idea, look up photos of them for a better understanding.

Do you have a link to these whizzers throttles?, is that a scooter? And as far as the alternative carbs, do they fit a CB500?

When you say internal throttle, is it using piano wire or regular cable??

 If you run other carbs ie Weber or the 2 Mikuni setups, the pull will be far lighter.. Also 77/78 750 carbs have 2 different slide, one may pull easier.. They used plated brass and abodized in those years.

 I do know of an inline wire throttle setup that is external, follows the bars, and is pretty clean looking, and perhaps earier to build. It was used on Whizzers, you can probably by them or make a cleaner version..

[754]

I am thinking looks are important to you.

 Webers would be pretty big on a 500. There was a smaller version Mikuni-Solex twin throat, that would look right , but you probably have to build a manifold.
 Single Weber or Dellortto, would be easy to set-up and run , if you can build your own manifold.
 The 2 Mikunis I spoke of earlier, are from Cycle-X, a few run them on here, again if you can build manifold( be easier than the Weber style)

 Search, Whizzer Twist throttle. the reason I suggested building you own was they are long, and sorta bulky. The tricky part is the slitting operation, not as hard as it looks but you need a mill.  Actually, I can tell you how to make your own spiral type,  if you are determined & handy with tools, bit of lathe work, and drill press..

 BTW on the Whizzer throttle that long grip screws on, can be changed. I have a few here, but cant post pics. Basically the spiral is outside the bars, the sliding element is, in a groove, below in the lower 1/2 of the housing. It slides along a narrow slit, on both sides of that groove below.. sorta simpler than it sounds..

 Where are you located?

[mrbreeze]

Jeeze Louise!!!!!!!

This IS a forum about motorcycles isn't it? 

Risk taking is part & parcel of riding a bike. I carry firearms too, and sometimes I don't bother putting on sunscreen Hell, I used to date a redhead!

Lotta old bikes have single cable throttles......if you can't cope with the risk, don't ride that way. But don't make a major issue outta the whole thing. It ain't proper & fittin! 

HERE HERE!!!!!!

[mrbreeze]

Happy to report.............yesterday and into the evening.......put around 80 miles down....no throttle bind ....broken spring......NOTHING!!!! Great ride as usual 

[Steve F]

 

Happy to report.............yesterday and into the evening.......put around 80 miles down....no throttle bind ....broken spring......NOTHING!!!! Great ride as usual 

   

[754]

Geez, never thought of this till I looked at an early 60s Honda. they had 7/8 bars with internal throttle, so does Z 50..

 Maybe you can keep 7/8 bars, and be all Honda..

[scottly]

Now that you mention it, my '66 C200 had that type of throttle. If I recall correctly, I had problems with it, and swapped on a conventional throttle.