Quantcast
Jump to content

Kawasaki 4010 (Gas) Revs/Puleses at top speed.


brothaman
 Share

Recommended Posts

Not sure I'm explaining that right. but,.. I'll start with some history.  I bought the 4x4 4010 mule with a bad motor.  I built the engine.  Bottom end up.  Fresh bearings, Pistons, etc.  Cranks up and runs with no issues.  However,.. doesn't seem to run faster than 20 mph and pulses at top speed like something is up with the governor.  It feels like its cutting back.  Climbing and pulling it seems to be fine,. It pulls hard and doesn't cut up.  But on the road flat out  Cuts back/Chugs/pulses/Revs. 

Not sure where to start. Kinda tired of thinking about it. Any Ideas?

Just a mention, I'm not trying to make it faster, just fixed.  25mph it good by me.  Hell,... for my purposes I'm fine with 20 mph as long as its' running properly.

Link to comment
Share on other sites

Welcome to the UTV Board!

 the top speed is supposed to right at 25mph.

First off, whenever i have this similar problem with any engine, i start by running  some carb cleaner through it (pour proper amount or whole can in gas tank)  i usually do half a can for 4 gallon tank. and if that don't work

 i would check your valve clearances, check your manual for specs.

 Someone more experienced than me should come along soon. and will probably have a better idea than me.

 

Link to comment
Share on other sites

So, I've learned some more about this thing.  I bought the SXS from Sunbelt who leases these to construction companies.  I was told they are locked down to 17 mph for construction site work.  I clock 18 mph uphill by GPS.  Not sure how true that is, but my contact there says this is the case.  I don't see any aftermarket device attached like the dynatech thing I've seen.  

Could this be set at the ECM?
Can the ECM be reset to Factory specs?

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

  • Similar Topics

    • By J Gill
      any suggestions? my 2019 mule sx fi wont idle down completely, I have to lift the box and flick the throttle lever and it comes back down.
    • By Karlibob
      I have a 2020 800 sx with about 16 hours on it.  From day one I have heard a clunking noise from the front end going over bumps.  Has anyone else experienced this?  Also this past weekend while out riding I heard a noise that sounded like the dump bed bounced three or four different times, again has anyone experienced anything like that.  Thanks, gary
    • By Brian Owens
      I put a deposit on a mule sx xc about a month ago. The dealer said Kawasaki told them to tell the customer there would be a 4-12 week waiting period for delivery.  Do any of you have any insight what the actual delivery wait  time may be?  I live in Tennessee.
    • By johnpeter
      2020 can am maverick trail 1000 4x4  On Ebay
      https://www.ebay.com/itm/324827257531?

    • eManualOnline
    • By Quade
      This is my first UTV and it ran great the first 500 miles. Then it slowly got harder and harder to start. Now I have to keep giving it gas when I first start it for about 1 minute until it will idle by itself. This past weekend I took it on the trail and it died 15 minutes into the ride and lost all spark. I got towed home and tried to see if I had spark the next morning which I did and it started but died 10 minutes later. Anyone have any ideas what I should do or check? Anything would help thank you!

×
×
  • Create New...