My shiny clean CV carb vacuum port slide got stuck again.
After some research, i found,
To make the CV carbs less "responsive" to vacuum, you can shim the spring on the top of the slides to make it a little stiffer. That would make them much steadier when you crank open the throttle. Again, it's because they're designed for vacuum "pulses" instead of a steady vacuum draw.
The slide-type carbs will stick if they have constant vacuum on them. They work well on a bike because they're one carb per cyllinder, and the vacuum comes in pulses instead of being steady. That's also why most bikes have push and pull cables.
If this is true, then Constant velocity carbs are not suitable for single cylinder buggys.
I thought because it was CONSTANT velocity, that they were totally suited for single cylinder motors... They dont need the pulse that you talk about to keep running efficiently. I am dumb-founded that you keep running into this issue with your cv carb. Have you considered an inherent defect in your carb as the culprit, like a bad seat or poor casting? I have heard this to be common in many of the newer TJ powersport-like 150 motors, that a carb problem is often poor quality of components, but not the actual set-up on the buggy its self....
I have never, knock on wood, had an issue with either of my carbs, but I upgraded to a monster 32mm carb on my 150, and I have NO fuel delivery issues at all. Proper jetting and constant filter maintenance have kept me running fine on the fuel delivery part... it is the transmission where I have my difficulties in tuning!!! lol
I am dumb founded why it sticks too. However, since i have coated the slide in Tri-Lube, (gun metal oil) it has not stuck since.
Maybe after cleaning the carb components in future, i will be using Tri-Lube.
Hope this is the last on this issue, no doubt there will be future issues on different components.
Thanks for your input.
Have you seen my video ?
Enjoy.
http://www.buggynews.com/topic9551.html
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