420cc predator EZGO help

Heavyweight15 · 09-23-2019, 09:03 AM

Hey guys super new to forum and golf carts with swaps. I picked up an ezgo txt with big lift and 27” tires. It has a 420cc/13hp predator that **** the bed. I put a brand new motor on with governor still attached. It has a torque converter to chain drive and does a whopping 12mph. Only aftermarket part is a billet adapter and air filter. Have a couple questions:
1. What can I do to get more speed? Remove the governor? Is that reliable?
2. What speed should I see with this cart?
3. Where do I hook vacuum lines to since airbox is removed? Thanks guys bare with me.

BIKERMIKEYBLACK · 09-23-2019, 11:44 AM

Install 35 lb valve springs and remove governor then you can rev over 3600 but keep it under 500 rpm free flowing exhaust k&n type air cleaner from then on it’s how much do you want to spend also rejet the carburetor

BIKERMIKEYBLACK · 09-23-2019, 12:30 PM

5000 rpm not 500 lol
And use a good synthetic oil

Shepard · 09-23-2019, 03:11 PM

Where does the chain drive go? To the original transmission or to a straight axle?

The 420 Hemi will accept lots of parts from the Honda 390 - 460 series engines. The difference is piston and head. The rest of it is regular 420 Predator.

Heavyweight15 · 09-23-2019, 07:41 PM

Quote:

Originally Posted by Shepard

Where does the chain drive go? To the original transmission or to a straight axle?

The 420 Hemi will accept lots of parts from the Honda 390 - 460 series engines. The difference is piston and head. The rest of it is regular 420 Predator.

It goes to the rear end

Low-Tec · 09-23-2019, 08:20 PM

None of the things mentioned will gain you as much speed as simply changing the size of your sprockets.

How many teeth are on the the front and the rear sprockets now?

Shepard · 09-23-2019, 08:26 PM

Why not try to find the proper secondary clutch for your rear and go with a comet 780 drive clutch.

Like Mike said - install 35lb valve springs to protect the valves from floating. Open the side cover and remove the governor gear and weights so they fly apart at high rpm.

Get a good tachometer and keep it below 4500 rpm and you should be able to get 30 mph on the flat roads

Heavyweight15 · 09-24-2019, 06:32 AM

Quote:

Originally Posted by Low-Tec

None of the things mentioned will gain you as much speed as simply changing the size of your sprockets.

How many teeth are on the the front and the rear sprockets now?

Idk know I will count today

Heavyweight15 · 09-24-2019, 06:33 AM

Quote:

Originally Posted by Shepard

Why not try to find the proper secondary clutch for your rear and go with a comet 780 drive clutch.

Like Mike said - install 35lb valve springs to protect the valves from floating. Open the side cover and remove the governor gear and weights so they fly apart at high rpm.

Get a good tachometer and keep it below 4500 rpm and you should be able to get 30 mph on the flat roads

I thought it was the proper clutch/tc setup

Shepard · 09-24-2019, 07:16 AM

Quote:

Originally Posted by Heavyweight15

I thought it was the proper clutch/tc setup

This is what it should look like.

09-23-2019, 11:44 AM	#2
BIKERMIKEYBLACK Gone Wild Join Date: Jun 2011 Location: Kingston Springs Tn. Posts: 874	Re: 420cc predator EZGO help Install 35 lb valve springs and remove governor then you can rev over 3600 but keep it under 500 rpm free flowing exhaust k&n type air cleaner from then on it’s how much do you want to spend also rejet the carburetor

09-23-2019, 12:30 PM	#3
BIKERMIKEYBLACK Gone Wild Join Date: Jun 2011 Location: Kingston Springs Tn. Posts: 874	Re: 420cc predator EZGO help 5000 rpm not 500 lol And use a good synthetic oil

09-23-2019, 03:11 PM	#4
Shepard Crazy Ole Man Join Date: Jan 2016 Location: Owego NY Posts: 2,758	Re: 420cc predator EZGO help Where does the chain drive go? To the original transmission or to a straight axle? The 420 Hemi will accept lots of parts from the Honda 390 - 460 series engines. The difference is piston and head. The rest of it is regular 420 Predator.

09-23-2019, 08:20 PM	#6
Low-Tec Not Yet Wild Join Date: Aug 2016 Posts: 45	Re: 420cc predator EZGO help None of the things mentioned will gain you as much speed as simply changing the size of your sprockets. How many teeth are on the the front and the rear sprockets now?
Low-Tec Not Yet Wild Join Date: Aug 2016 Posts: 45

09-23-2019, 08:26 PM	#7
Shepard Crazy Ole Man Join Date: Jan 2016 Location: Owego NY Posts: 2,758	Re: 420cc predator EZGO help Why not try to find the proper secondary clutch for your rear and go with a comet 780 drive clutch. Like Mike said - install 35lb valve springs to protect the valves from floating. Open the side cover and remove the governor gear and weights so they fly apart at high rpm. Get a good tachometer and keep it below 4500 rpm and you should be able to get 30 mph on the flat roads

Today
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