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Old 08-29-2022, 09:49 AM   #1
SammyL
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Default 2021 Express S4, how to increase speed, maybe governor adjustment

Researched this site and not coming up with an answer.

Current top speed is 21mph and really want to get another 5-10 mph. It is a 2021 Express S4 EFI, lifted. Since it is still under warranty, really didnt want to put a different rear end gear in it. Barely fits in the garage so I can't put taller tires on it either.

I adjusted the throttle cable and it is at full throttle. Not sure if the governor can be adjusted or what the proper coarse of adjustment might be.
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Old 08-29-2022, 09:56 AM   #2
kgsc
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Default Re: 2021 Express S4, how to increase speed, maybe governor adjustment

Adjust the small cable on the transaxle so that fewer threads are on the spring side. Don’t get too crazy as you could over rev the motor..
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Old 10-04-2022, 01:06 PM   #3
SammyL
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Default Re: 2021 Express S4, how to increase speed, maybe governor adjustment

The only cable that has a spring is the gear selection. It seems that there is a governor that is preventing an increase in RPM.

At a total loss on this one.
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Old 10-05-2022, 09:09 PM   #4
slonomo
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Default Re: 2021 Express S4, how to increase speed, maybe governor adjustment

What engine does this have? It could have an electronic governor/rev limiter. If you follow the accelerator cable back to the rear, does it hook onto the transaxle or does it go directly to the carburetor?
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Old 10-05-2022, 09:18 PM   #5
CP241
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Default Re: 2021 Express S4, how to increase speed, maybe governor adjustment

An extra 5-10mph is a lot to ask of that little cart. You’re gonna need gears to accomplish that without serious impact to the life or reliability of the engine.
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Old 10-07-2022, 08:14 AM   #6
09MPT1200guy
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Default Re: 2021 Express S4, how to increase speed, maybe governor adjustment

Depending on the size of your tires, you might not get much more than 21, if the throttle cable it adjusted already. I always feel like the brakes get very sketchy over 21+
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Old 10-07-2022, 08:40 AM   #7
SammyL
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Default Re: 2021 Express S4, how to increase speed, maybe governor adjustment

Quote:
Originally Posted by slonomo View Post
What engine does this have? It could have an electronic governor/rev limiter. If you follow the accelerator cable back to the rear, does it hook onto the transaxle or does it go directly to the carburetor?
It is a Kawaski 13hp, pretty sure it has a electronic governor.
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Old 10-07-2022, 08:41 AM   #8
SammyL
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Default Re: 2021 Express S4, how to increase speed, maybe governor adjustment

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Originally Posted by CP241 View Post
An extra 5-10mph is a lot to ask of that little cart. You’re gonna need gears to accomplish that without serious impact to the life or reliability of the engine.
At this point I would take 3-5mph
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Old 10-07-2022, 10:58 AM   #9
kgsc
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Default Re: 2021 Express S4, how to increase speed, maybe governor adjustment

If it is the Kawasaki motor it should have this setup..
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Old 10-12-2022, 10:38 AM   #10
MD Acres
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Question Re: 2021 Express S4, how to increase speed, maybe governor adjustment

I also have a 2021 Express S4 and can't really find that much
info on mods, oil change, clutch etc..
Any place to land info is greatly appreciated
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