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Kymco UTV SxS Forum

This is for all of you Kymco UTV, SxS (Side by Side) owners. Discussions about Kymco UTV specific topics including UXV models.


21 topics in this forum

  1. KYMCO UTV'S

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  2. Speedo Calibrate

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  3. 2012 Kymco UXV 500i axle

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  4. 2016 Kymco 450i ECU

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  5. New tires

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  6. Kymco Uxv lift kit?

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  7. 2017 Kymco UXV 450i No Start

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    • 3.3k views
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  • Latest Posts

    • 2023 Can-Am Maverick Sport XMR 1000R RED TITANIUM On Ebay https://www.ebay.com/itm/156096225938?
    • Synthetic vs conventional has nothing to do with clutch slippage. The clutch slip is caused by viscosity modifiers used in "Energy Conserving" oils (you'll see that with the API Starburst ratings). JASO MA rated oils are designed to work properly with wet clutches used in Japanese bikes, as well as ATV/UTVs etc that use wet clutches. Do not use a non JASO-MA rated oil unless you can confirm it is wet clutch safe, and afaik the only common non MA rated oil that is ok is Rotella.
    • They both need to be fully off their respective cam lobes. You can either look at the cam or pull the spark plug and look through the hole with a flashlight. It's much easier to spin the engine over by hand with the plug pulled since you're not fighting the compression.
    • Hello, Before I invest $10k+ into a brand new UTV for the farm, I want to get my feet wet with a fixer upper and learn the mechanical side of things. I acquired a 2022 Hisun Axis 500 (Lowes-specific model) from an auction for $500. It has only 200 hours and 120 miles on the engine. It looks like the previous owner used it for ranch work and didn't drive it on trails, deep water/mud, or anything too crazy. While it runs and moves, it has some problems. It struggles to accelerate up any incline in high and low range and sometimes stalls when I let off of the throttle or change gears. When I apply throttle in neutral, it sounds like it is struggling for fuel/air and pops. When I decelerate, there is a grinding sound coming from the clutch, which I've read to be related to the one way bearing and is semi-common. The last thing I've observed is sometimes the speedometer display sometimes will show a much higher value for a few seconds after barely touching the throttle. Based on the documentation, if a problem is detected from the sensors, the instrument panel display should have an error code rendered on the screen in place of the time, but this isn't happening. Here is a video showing some of these issues (engine is exposed with console removed): https://www.youtube.com/watch?v=FFAkO5TaGps   Here is another video of the clutches in action:   I've done some research, but information on this specific unit and sister units is limited. There does seem to be transmission and clutch issues reported. I still need to check into the head gaskets. I don't have the equipment to test compression right now, but I do plan on ordering what is needed soon. I do have an order in place for some cables to read the diagnostics from the computer. There is a shop two hours away from me that works on Hisun products, but I am hoping the problem can be identified and is something within my ability to handle. Below is what I've already investigated.  I am leaning towards the primary clutch needing replacement right now. After getting it home and unloaded, I did the following maintenance/checks to it prior to operating it further: Changed the engine/clutch oil (and filter) and gear oils using manufacture recommended viscosity Changed the air filter and checked for cracks in the air intake flow. Verified good suction. Cleaned the throttle body Changed the spark plug and verified the gap was within spec (0.6-0.7mm) Changed the coil and coil wire Changed the fuel lines, fuel injector, and verified the fuel pump was outputting the correct initial prime pressure for ignition and continuous pressure after ignition. Also completely emptied the fuel tank and made sure octane 91+ fuel is being used per manufacturer specs. Ran seafoam through system too. Cleaned the spark arrester and verified no cracks or gaps in the exhaust flow Changed out the O2 sensor Checked all wired connections to ensure they were secured and no breaks were visible Checked the belt for tightness and for any signs of wear and tear Verified 4WD and the differential lock function as expected - still hesitates and struggles uphill Verified the fan gears in the shifter are not corroded and working as expected ECU was reset after replacing sensors and fuel-related parts     Thanks!
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