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post #1 of 4 (permalink) Old 03-13-2019, 10:01 AM Thread Starter
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Reduce Power

I've searched and haven't found anything. My kid (11) recently got into four wheelers (his buddy has one) and I came across a 400 Sport for a great deal. This thing is great and has a ton of top end power...too much power for him while he is still learning to ride.

Are there any ways to reduce the power or limit the rpm range?

Thanks in advance.
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post #2 of 4 (permalink) Old 03-13-2019, 10:09 AM
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One of the easiest ways to slow down the wheeler is to limit the amount of throttle input. Idk if there is a kit out on the market for your wheeler but essential it is a screw that can limit the throttle range. I'm sure but not knowledgeable enough that the wheeler can be slowed down via a clutch mod or something like going to a smaller jet in the carb.

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post #3 of 4 (permalink) Old 03-13-2019, 10:42 AM
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Only way is to limit the throttle opening.

Do not even think about reducing jetting, especially on a 2 stroke.

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post #4 of 4 (permalink) Old 03-13-2019, 12:33 PM
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You can do the same thing that is done on the youth machines I think. The throttle stop is nothing more than a hole in the throttle housing on the handlebar with a screw that limits how far the throttle is allowed to open. Then a jam nut to lock it in place. If you can, go to a dealership and have them show you the throttle stop on any of the youth machines. I think it would be fairly simple to do.

I will try to remember to post a photo from the Sportsman 90 I have for the grandkids.

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