Predator 420 Stock Throttle Linkage?

[SquidBonez]

I just got a Predator 420, just wondering how the throttle linkage is supposed to work. It seems to be inverse of the 212 I'm used to. At the "idle" position (throttle arm forward), the carb is actually wide open. While at full throttle on the arm, the carb is at idle. How do you set this up for use on a go kart? I'm planning to keep the stock throttle linkage.

 

[machinist@large]

I just got a Predator 420, just wondering how the throttle linkage is supposed to work. It seems to be inverse of the 212 I'm used to. At the "idle" position (throttle arm forward), the carb is actually wide open. While at full throttle on the arm, the carb is at idle. How do you set this up for use on a go kart? I'm planning to keep the stock throttle linkage.

A couple of pictures would be quite helpful. As for mounting a cable, it's definitely going to need to pull in the correct direction. That usually means the end of the cable will need to approach the throttle from the direction of pull, meaning potentially a longer cable and custom cable mounts. That's as far as I can go without pictures, and/or having both engine's in front of me, side by side.....

 

[Karttekk]

This guy has a solution.

 

[SquidBonez]

Ok I got it figured out. Pretty simple. All I did was swap the small gold spring from the attachment point on the carb butterfly to a part on the engine itself and tightened it down with a screw. Now it returns to idle when I let off the throttle. No drilling or modifying the linkages necessary. Pictures below:

 

[Karttekk]

Looks good. Thanks for sharing.

 

[Joe-405]

I got the way for no governor also. I posted it a few months ago.

using all oem throttle linkage stuff.

 

[Thurman20]

Is this setup for a 420 that has a governor installed still?

 

[Denny]

Looks like it is still installed.

 

[madprofessor]

Need to test how much change if any in the governor rpm setting came about by relocating stuff. Go ahead and terminate your throttle cable conduit under the clamp by the plug boot, and attach your cable to the pinch fitting on the manual throttle lever. Have a tachometer?

 

[SquidBonez]

Is this setup for a 420 that has a governor installed still?

I'm using the stock linkage even after governor removal. You don't actually need to take the governor arm out for it to work, just the gear.

 

[USAMAC]

I got the way for no governor also. I posted it a few months ago.

using all oem throttle linkage stuff.

I keep looking for this that you've referenced, but I can't seem to find it.. did it get removed/archived?

 

[Budget GoKart]

i also just remove the gear and put a spring on the butterfly i have been running it like that on my yerfdog for a very long time i need to rebuild my motor it has a bajillion hours on it still runs strong but leaks a ton of oil and is covered in black mold for some reason i think my paint is rotting

 

[kanklemonster]

Ok I got it figured out. Pretty simple. All I did was swap the small gold spring from the attachment point on the carb butterfly to a part on the engine itself and tightened it down with a screw. Now it returns to idle when I let off the throttle. No drilling or modifying the linkages necessary. Pictures below:

I can't find the pictures sir.

 

[Hellion]

I can't find the pictures sir.

This thread is from 2021. The photos were most likely externally hosted and are long gone. My advice is to post a new thread, new question and post a photo of your current throttle setup.