Quantcast
Jump to content


2021 Massimo MXU 1000 Runs Rich

ToughLuck

By ToughLuck
in Massimo UTV SxS Forum

 Share

Recommended Posts

ToughLuck Newbie

ToughLuck

Posted
Posted

I have a 2021 Massimo MXU 1000.  Last winter the front drive shaft sheared off inside the motor and it was cheaper to buy a new motor than to take it apart in order to remove the front drive shaft that was broken inside the case…

Now it is running rich, seems to maybe be geared too high, does not accelerate well once you hit about 28mph.  I’ve replaced the O2 sensor.  MAF is next (I accidentally ordered the wrong one, but when I removed the old one you can clearly smell fuel).  
 I’m not a motorhead but I can turn a wrench.  Any ideas how to get this motor optimized?  The motor has about 300 miles on it.  I broke it in as recommended in the manual. 

  • ToughLuck changed the title to 2021 Massimo MXU 1000 Runs Rich

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
Go to topic listing

  • Similar Topics

    • Rusmis91
      Considering buying a 2021 1500 coleman
      By Rusmis91
      I’ve never been around Coleman Utv machines. Do they have a good reputation, durable dependability. Could you compare them to yamaha rhinos or Polaris ranger
       
      thanks in advance
    • Adrian Domingues
      2023 Massimo T-Boss 550
      By Adrian Domingues
      I have 31 miles on my new T-Boss 550. In order to start I put in nentural and the emerage brake on and push down on brake paddle, then trun ket and get nothing, with key still on I shift to reverase and the back to netural and it starts.  Anyone know what is happening.
      Thanks for your help
    • Eman85
      Best place to find info on Hisun or Massimo UTV's
      By Eman85
      I have been searching and can't find much info on these units. Pretty surprising as every other thing I own I find a lot of info on. Researching for tech info and such it's like no one owns any of these yet I see them everywhere. 
    • Jeff freeman
      Utv wont start and broken fuel injection wire
      By Jeff freeman
      I have a Coleman 550.  Was having problems to start with where it would start and then shut off after a couple tries. It would take off and be good. It then got to a point where it would not start at all. I replaced the fuel injection twice the second time I replaced it I noticed a mouse or something had chewed one of the wires that connect the electrical to the fuel injector. . So two-part question first does anybody have a part number for that wire harness?  Second, any other ideas after I fix the wire harness permanently on what could keep it from starting I have gas flow up to the fuel injector.


    • JohnnyB
      Massimo 500 will not start
      By JohnnyB
      My Massimo 500 will not start. I’ve checked all the obvious things. It turns over just fine. fuel, spark, fuse box are all good. I can’t figure it out. Any ideas would be greatly appreciated. Thank you.

UTV FORUMS

MORE SECTIONS

FOLLOW US ON

GET IN TOUCH

  • Automotive Webmaster
×
×
  • Create New...