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Messages - nostinkinroads

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Technical | How To / Re: feels like brake is on
« on: December 17, 2023, 02:29:33 PM »
Quote from: Chasdrng on December 10, 2023, 02:57:27 AM
Hello everyone, i just bought a 500 and it feels like a brake is dragging. I have jacked it up and i can turn each wheel but it's no where freewheeling. It does this in reverse and from a dead stop and a slow takeoff the second i let off the throttle it stops like a brake is dragging the rotors are not getting hot. Someone said they have a engine brake but im not sure. This is my first side by side so if anyone could help me figure it out.
Since these machines have a CVT (basically a snowmobile drive) they never truly "freewheel.
Even in neutral the belts must rotate inside the CVT causing resistance. If the brakes aren't getting hot I wouldn't worry about it.
I have a UXV 450i, even up on 4 jackstands (as it is right this moment), in neutral with the parking brake off the rear wheels are hard if not impossible to rotate, nature of the beast.

Ever try to push a snowmobile?

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General Discussion / Re: The end of gas-powered motorcycles?
« on: December 07, 2023, 07:20:41 PM »
Quote from: JJJoseph on December 07, 2023, 08:54:16 AM
There's a lot of noise from some regions about the end of gas-powered cars and trucks by 2030. What are the plans in your part of the world? Does this include scooters, motorcycles, boats and airplanes, too?
2 weeks after gas powered vehicles are outlawed 95% of the Earth's population will have starved to death and you will be free to drive whatever you like if you survive.

Wood fueled Gasifiers ftw just in case.

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Side By Side / Re: UXV 450i will not start
« on: November 26, 2023, 01:59:00 PM »
Quote from: airshot on November 22, 2023, 06:10:02 PM
Thanks for letting us know your findings, sorry to hear about your issues, hoping your issues were a rare problem as many of us on this forum have older models, mine is a 2015 model.  So far not a single issue....probably should not have said that !!
Sure thing, I like to be helpful if I can.
I would recommend swapping out the...
"Advice, if you have an older Kymco side by side that is still running buy and install a new timing chain guide tensioner assembly as a preventive maintenance measure, it's an easy external fix and no fluids will be lost."
Comparing my older tensioner to the new one there was a full 1/4 inch of slack being allowed by the old one.

Got the new valves in, installed them and it's up and running again. I'll be reassembling the machine today, still has a code for the stuck Idle Air Control Valve P0410, the old one was in a stuck position almost fully closed, I forced it open just a smidgen so it will stop stalling at idle.
Will be replacing it as soon as I find an cross referenced match from an automotive application that is less than the $103 that Kymco wants.

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Side By Side / Re: UXV 450i will not start
« on: November 12, 2023, 12:05:21 AM »
Update:
After tearing the engine down I found that it had jumped time and bent all 4 valves.
Problem was caused by a weak/worn spring in the timing chain guide tensioner assembly that allowed excessive play.

Advice, if you have an older Kymco side by side that is still running buy and install a new timing chain guide tensioner assembly as a preventive maintenance measure, it's an easy external fix and no fluids will be lost.

Will be ordering some parts...will report back.
Any info on a good source for parts that will ship direct would be welcome.

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Side By Side / Re: 2015 450i steering column loose
« on: November 04, 2023, 09:46:38 PM »
Quote from: mstparker on October 10, 2023, 01:02:13 PM
Wobbles every direction. Still steers good, all the knuckle joints are good. Saw some fixes by putting a plastic bushing back in place, but I don’t see it. Any ideas?

Edit: plastic bushing is hard to see but I managed to push it back down into the hole. All is well again.
I'm in the process of stripping a '15 down to the frame working on other issues and was going to mention the bushing I discovered on mine...nevermind.
BTW this one is liable to be for sale pretty soon for parts if I can't figure out a fix to the no start problem (separate thread).

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Side By Side / Re: UXV 450i will not start
« on: November 03, 2023, 01:55:41 PM »
Quote from: randyo on November 03, 2023, 02:02:06 AM


Have you tried simply disconnecting the battery, and reconnecting to reset?
Yes, as well as disconnecting the display and the ecu and disconnecting and cleaning every connector on the entire machine.
I have it stripped down to the frame at this point for easier access to the veritable smattering of needless electronic foolishness.

7
Side By Side / Re: UXV 450i will not start
« on: November 02, 2023, 08:13:45 PM »
Quote from: CROSSBOLT on November 02, 2023, 04:12:09 AM
I am guessing this will be like all other Kymcos that valve clearance would be .004" for both in and out...

Set at TDC where valve clearance is max.
Do a compression check.
Report here what you find.

Service manual may show at manualslib.com
Couldn't find the service manual at manualslib but I did find one for the MXU 450i which seems to be the same engine.
Valves and compression are within specifications.
No joy, been over everything I can test on this thing today and can't even get a cough out of it.
Solid spark, good fuel pressure and injector action.
Literally can't find anything wrong, which leads me to think once again that it's something simple.
Would love to be able to reset the celp to rid it of the P0410 error but nothing has worked.
Running on a shoestring budget here, at the moment I'm super frustrated and not really wanting to throw a pile of cash at this thing.

8
Side By Side / UXV 450i will not start
« on: November 02, 2023, 02:12:04 AM »
I've recently gotten a used 2015 UXV 450i in very good condition. The previous owner said the plug would foul every week or so and would require a cleaning.
It had a celp notification P0410 idle air valve circuit malfunction (previous owner said for some time).
I brought it home, installed new plug, the NGK recommended in the manual, changed the oil and did all service including new battery. Ran great for 3 weeks with no issues.
A few days ago it wouldn't start, still won't start in any gear (brake pedal pressed).
Began troubleshooting...
Strong spark
Nice spray pattern from injector, removed it and watched it spray into a pan while still connected electronically to machine.
Strong compression
No blown fuses
No visible wiring issues (checked every connection visually)
Doesn't even spit or sputter, even starting fluid spray no effect.
If I give it full throttle when I try to start it it does backfire throttle body into airbox.

Has this engine jumped timing? I have no service manual and the nearest Kymco service is 250 miles away.
I'm a better than average mechanic, forever resurrecting peoples old throw away stuff for my own use.
I am hoping I don't have to rebuild this engine since parts seem to be pretty darned hard to find.
couple questions:
How to check timing?
How to clear celp?
Proper valve adjustment specs/method (quite alot of play in the rocker arms)
Identify which module is the idle air valve.

Thanks in advance!

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