Quantcast
Jump to content


2008 Massimo 700 high speed problem

Robert G1

By Robert G1
in Massimo UTV SxS Forum

 Share

Recommended Posts

Robert G1 Newbie

Robert G1

Posted
Posted

Hi all. I'm new to the site. A few years ago I bought a used Massimo. Recently I've had a issue driving above 25mph. The engine won't go any faster. In fact it seems to sputter and hesitate. The whole engine shakes. I've changed air filter.oil,oil filter, throttle cable oil/air cooler,and carburetor and still no luck. I was wondering, could it be the fuel pump. Should I invest in an electric fuel pump? I'm just not sure. It starts fine and revs while in neutral. Any advice would be great. Thank you 

KentC Apprentice

KentC

Posted
Posted

I have the same problem with a Buck 400 since it was new.  I rarely need any such speed, so I have ignored it. I would like any suggestions. 

Robert G1 Newbie

Robert G1

Posted
  • Author
Posted

I thought and read about the seatbelt thing, I tried no luck. The red light is about two wheel/four wheel. I think it might be The fuel  pump. I have something similar to this. I was thinking changing to a micro electric pump. Any advise would be greatly appreciated

fuel pump.jpg

Greg Kilgore Community Regular

Greg Kilgore

Posted
Posted

You could try a fuel pump as long as it would pump enough volume for what you need. And remember most electric fuel pumps like to push not pull. So the pump would need to be close to the tank. I replaced a fuel pump on a Kohler 18hp lawn mower with a cheap electric one and it has worked fine.  But that was 1994 lawn mower not a side by side. Also if the pump supplys more gas than the machine uses there needs some place for extra gas to go so it doesn't flood the engine. 

 

Look up the specs on what the max speed SHOULD be in LOW and HIGH vs what you actually get in LOW and HIGH. A sensor could think the machine is in low when actually in high and not letting it go any faster.

 

Is it the same speed on level ground vs an incline? 

 

Really acts and sounds like a sensor or something limiting the speed. But I have been wrong before.

 

Someone more knowledgeable on the engines may be able to help.

 

Hope you get it fixed and post your fix

Greg Kilgore Community Regular

Greg Kilgore

Posted
Posted

Put a forked prybar or flat screw driver behind the bolt. Apply a little outward pressure as you loosen the bolt. Hopefully it's just the bolt and not the case.

 

After bolts are out. Maybe a thread chaser or maybe have to tap new threads a size bigger.

Greg Kilgore Community Regular

Greg Kilgore

Posted
Posted

Maybe take the door off and side skirt off that side to make things a little easier to get to.

 

Maybe a magnetic hex bit.

 

Use extensions. I had to use about 3 ft of extensions to get the case off my cfmoto. The cvt case was being the gas tank. Had to take off wheel to get the tank out of the way.

 

Just take your time. You'll get it. I have faith in your abilities. 

Greg Kilgore Community Regular

Greg Kilgore

Posted
Posted

You said you bought it used. 

Maybe the previous owner did some kinda bypass on the seat belt safety wire.

 

Check to see if there is any kind of wires going to the drivers side seat belt clip that tell the machine if you have uour seat belt on or not.

 

Possible if the previous owner did rig something, it might have came loose on one of your rides.

 

Just grasping at straws.

Robert G1 Newbie

Robert G1

Posted
  • Author
Posted

Update, I'm in the midst of changing the clutch. I bought replacement parts. I noticed they included a one way bearing, but when I took off the old, there was no bearing. Do I put the new one on. I have an '08  Massimo 700. Technically, isssss it suppose to have one? Thank you

Greg Kilgore Community Regular

Greg Kilgore

Posted
Posted

One way bearing will slow down the machine when letting off the gas. To help hold back the machine when going down hills and such.

 

I don't know if itbis supposed to have the one way bearing or not. It can help save brake pads. Kinda of a personal preference. 

 

You could go to alpha-sports or another site to see if their parts list shows a one-way bearing. Or in a repair manual to see what it says.

 

When the engine turns. The clutch grips the clutch drum and the bearing free spins basically. When you let off gas. The one way bearing kinda grabs and doesn't let the clutch drum spin freely. Causing it to grab forcing the engine to spin. The compression of the engine causes the machine to slow down. Not technical but this is how the bearing works. Sort of. The only way I know to explain it.

 

Again a personal preference. If you don't want the machine to hold itself back when letting off gas. Don't put it in. If you want the machine to hold back a little, install.

 

Either way, will not hurt top speed. Unless you install backwards.

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

    • didgeridoo
      Hisun Sector e1 Battery replacement: any tips?
      By didgeridoo
      Hello, All!  I've decided to replace the traction batteries in my 2018 Sector E1 with a 48V Lithium set. They may be expensive, but I figure the Discovery Dry Cell are, too. I am not looking for the max driving range, as I have never received near the brochured range to begin with, but a good mix of charge/ get work done/ charge is what I am expecting.
      I have settled on the 48V EAGL kit from bigbattery dot com. Each battery pack provides 30Ah. The kit ships with a charger, as well. The packs would be physically connected in parallel (using a busbar) to one another, maintaining the 48V voltage, but together would be able to provide the amp draw the buggy pulls when going up hill or towing a rake (rated 320 max continuous Amps). This is in comparison to the serial connection the eight 6V lead batteries. Each of the EAGL batteries looks to have its own BMS; am I correct in thinking I will have to use their included charger rather than (simply) changing the onboard charger to lithium mode? The chemistry of the pack is LiFe PO4, for what it's worth.  I haven't torn anything apart yet (to diagram), so  I am not sure how the dash will interpret the AMP draw, but the kit I am looking at includes a dash mounted charge indicator.
      If anyone has completed a similar conversion, do you have any tips? Specifically, how did you remove the original batteries, and how did you secure the new ones? I am guessing that almost any change from the stock batteries would involve at least some modifications. Any tips would be appreciated, especially things I may have failed to consider. Thanks!
    • Duane Baker
      Hisun 700 engine
      By Duane Baker
      I'm looking for an engine for my Hisun 700 SXS.
      I've found a LOT of scam sites, and need to find a legitimate business to purchase a used engine.
    • Sando
      Massimo Buck 450 will not start
      By Sando
      2023 Massimo Buck ran for minute then died. Key on all power to dashboard but do not hear full pump turn on like previously. Also no fire at plug. ECU?
    • Pick a name
      Shifting issue
      By Pick a name
      The Axis 500 will not shift into low or reverse.  I have high when it should be in low and all the other places it is reverse.  The gears in the shift cover are fine and I shifted it when the cover was off and yet no change (so it can't be the shifting mechanism gears).  I t has been difficult to get it into low for awhile.  But now it is either high or reverse, no neutral either.
    • Unhappy Kioti K9 Owner
      Any Kioti K9 2400 owners joining for class action?
      By Unhappy Kioti K9 Owner
      I own a K9 with 50hrs that has been in for repair more than once the farm.  Multitude of issues, trying to file lemon on it but interested in knowing if owners are organizing for a class action suit.  The dealer informs me there are “a lot of owners very unhappy with these”.
      Thanks

UTV FORUMS

MORE SECTIONS

FOLLOW US ON

GET IN TOUCH

  • Automotive Webmaster
×
×
  • Create New...