EZGO TXT, Predator 670 Swap, Throttle Linkage

JPonLKN · 09-02-2020, 08:09 PM

Holy Crap, the throttle linkage on the Predator 670 stock carb is a ridiculous mess, and the Vegas Carts Engine Mods don't seem to work. The governor arm seems to operate the throttle on the carb, and the throw of the throttle cable and associated middle linkage don't seem to jive with the governor throw, hence a spring. VC says add a solid rod with some play to replace the spring, but that leaves the whole length of the play in the initial throttle cable movement with no impact on the governor arm, or the carb throttle linkage. Surely there is a better mouse trap out there as many times as this swap has been performed. Anyone interested sharing a photo of their setup? I can design and build a sheet metal plate with pivot to replace the current set up, but will destroy the original throttle linkage plate in the process and I would prefer not doing that in case I have to rebuild it and return it for warranty reasons. Please?

I'm not ready to buy the Mikuni and intake. We will get there eventually I expect...just not yet.

slonomo · 09-02-2020, 08:33 PM

While I don't have a Predator 670, the Vanguard is very similar. I hated the stock throttle linkage with the springs and rods and governor etc. It just had so much slop and never worked well for me. I did end up swapping to the Mikuni carb, which was well worth the cost and effort. Here is a video of my bell crank throttle setup prototype. It actually worked very well, much more accurate throttle feel. The aluminum plate bolts in place of the factory throttle linkages, I made it bolt in so I could go back if I wanted. Since then I have made the setup better, but same concept.

https://www.youtube.com/watch?v=lZyeDKMY40Y

JPonLKN · 09-05-2020, 05:51 PM

Well...I built a linkage. I will need to re-do it a bit...missed the throw by a 1/16th of an inch at full open, and need to fix the return spring. It functions, so building another to the correct dims should be doable. Thing idles super high...need to turn it down, and will go through the threads on adjusting to make it workable for now. Any shared wisdom on the Predator carb is appreciated.

Crack · 09-10-2020, 08:45 AM

Quote:

Originally Posted by JPonLKN

Well...I built a linkage. I will need to re-do it a bit...missed the throw by a 1/16th of an inch at full open, and need to fix the return spring. It functions, so building another to the correct dims should be doable. Thing idles super high...need to turn it down, and will go through the threads on adjusting to make it workable for now. Any shared wisdom on the Predator carb is appreciated.

Mine works great

slonomo · 09-11-2020, 07:41 AM

Well done. If it works good, the proof is in the pudding, right?

JPonLKN · 09-11-2020, 05:11 PM

I agree, whatever works. Glad you got yours to work as detailed by VC.

Mine would not work...I hooked it up the same way and could not get enough throw on the throttle...the governor was too short of a throw and restricted the movement. What I have now works well.

Crack · 09-12-2020, 08:27 AM

Quote:

Originally Posted by JPonLKN

I agree, whatever works. Glad you got yours to work as detailed by VC.

Mine would not work...I hooked it up the same way and could not get enough throw on the throttle...the governor was too short of a throw and restricted the movement. What I have now works well.

Just remove the governor and use a tac

kellett5261 · 09-29-2020, 07:49 AM

I did the double zip ties on my governor and its tied just right and my throttle stops right around 4500 rpm, I tell the wife to keep it under 4 so she doesnt blow the motor.

works great though.

JPonLKN · 09-29-2020, 01:53 PM

Quote:

Originally Posted by kellett5261

I did the double zip ties on my governor and its tied just right and my throttle stops right around 4500 rpm, I tell the wife to keep it under 4 so she doesnt blow the motor.

works great though.

Post a photo of your linkage set up and how you have the zip ties installed. After driving it a bit, I would like to get the governor hooked back up before I, or one of my idiot neighbors drives it an blows it up.

kellett5261 · 09-29-2020, 02:29 PM

Quote:

Originally Posted by JPonLKN

Post a photo of your linkage set up and how you have the zip ties installed. After driving it a bit, I would like to get the governor hooked back up before I, or one of my idiot neighbors drives it an blows it up.

that's exactly why I did the zip ties because you can adjust how high the rpm's go. I trust myself but others don't know any better.

I'll upload a picture today

09-02-2020, 08:09 PM	#1
JPonLKN Gone Wild Join Date: Jul 2020 Location: NC Posts: 773	EZGO TXT, Predator 670 Swap, Throttle Linkage Holy Crap, the throttle linkage on the Predator 670 stock carb is a ridiculous mess, and the Vegas Carts Engine Mods don't seem to work. The governor arm seems to operate the throttle on the carb, and the throw of the throttle cable and associated middle linkage don't seem to jive with the governor throw, hence a spring. VC says add a solid rod with some play to replace the spring, but that leaves the whole length of the play in the initial throttle cable movement with no impact on the governor arm, or the carb throttle linkage. Surely there is a better mouse trap out there as many times as this swap has been performed. Anyone interested sharing a photo of their setup? I can design and build a sheet metal plate with pivot to replace the current set up, but will destroy the original throttle linkage plate in the process and I would prefer not doing that in case I have to rebuild it and return it for warranty reasons. Please? I'm not ready to buy the Mikuni and intake. We will get there eventually I expect...just not yet.

09-02-2020, 08:33 PM	#2
slonomo Searching for The Way Join Date: Oct 2009 Location: Medina, Ohio (NEOHIO) Posts: 11,441	Re: EZGO TXT, Predator 670 Swap, Throttle Linkage While I don't have a Predator 670, the Vanguard is very similar. I hated the stock throttle linkage with the springs and rods and governor etc. It just had so much slop and never worked well for me. I did end up swapping to the Mikuni carb, which was well worth the cost and effort. Here is a video of my bell crank throttle setup prototype. It actually worked very well, much more accurate throttle feel. The aluminum plate bolts in place of the factory throttle linkages, I made it bolt in so I could go back if I wanted. Since then I have made the setup better, but same concept. https://www.youtube.com/watch?v=lZyeDKMY40Y

09-11-2020, 07:41 AM	#5
slonomo Searching for The Way Join Date: Oct 2009 Location: Medina, Ohio (NEOHIO) Posts: 11,441	Re: EZGO TXT, Predator 670 Swap, Throttle Linkage Well done. If it works good, the proof is in the pudding, right?

09-11-2020, 05:11 PM	#6
JPonLKN Gone Wild Join Date: Jul 2020 Location: NC Posts: 773	Re: EZGO TXT, Predator 670 Swap, Throttle Linkage I agree, whatever works. Glad you got yours to work as detailed by VC. Mine would not work...I hooked it up the same way and could not get enough throw on the throttle...the governor was too short of a throw and restricted the movement. What I have now works well.

09-29-2020, 07:49 AM	#8
kellett5261 Gone Wild Join Date: Mar 2018 Location: South FL Posts: 244	Re: EZGO TXT, Predator 670 Swap, Throttle Linkage I did the double zip ties on my governor and its tied just right and my throttle stops right around 4500 rpm, I tell the wife to keep it under 4 so she doesnt blow the motor. works great though.

Today
BGW	Sponsored Links __________________ This advertising will not be shown in this way to registered members. Register your free account today and become a member on Buggies Gone Wild Golf Cart Forum

Similar Threads
Thread	Forum
Ezgo governor rod assembly 1991-2002 Throttle linkage	Golf Carts and Parts
Looking for ezgo throttle linkage	Golf Carts and Parts
Throttle linkage on Predator 22hp?	Big Block Talk!
looking for ezgo throttle linkage	Golf Carts and Parts
Don't do this Ezgo 295/350 throttle linkage	Gas EZGO