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By weblex
Problem: The ATV starts and runs at idle perfectly. But as soon as I open the throttle, the engine starts to slow down until it stops. On the attached video you can hear the sound of how it works: see video below
Prehistory: there is a Polaris Sportsman 500 1998, which for about 1.5 years stood in repair, including also replacing CDI with one taken from the same ATV. Finally, the vehicles were on wheels, traveled several kilometers and overheated - forgot to fill the antifreeze Came back home in small moves. The next trip started well, but after 10 km there was a feeling of a small drop in power (even as the vehicle got warm completely) but still drives. Next trip - the situation is repeated. The next test of ATV through time and a huge loss of power from the very beginning. The engine sneezes, does not want to go more than 5 mph.
What has been done: the carburetor has been replaced with a new one (inexpensive, $ 40), a new spark plug, a new ignition coil, the engine head has been removed, the piston is in good condition, valves were corrected - but the problem was definitely not in them.
Ignition control unit is suspected. Who faced similar? Please help in solving the problem.
Thanks in advance.
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By JacobSlabach
in this thread, I want to discuss how 4-cycle atv engines work- what the different types are... how they are set up and which you prefer. To start off, are the cams on ALL atv 4-strokes powered by a cam chain? I know that on say a lawn mower or logsplitter engine, the cam is turned by the tappet, pushrods, and valve rockers. Which is better and why? Chain-driven cams or pushrod-driven cams? Are the pushrods just an old version and everything is transforming to chains or the other way around...or not at all? Just looking for some explanation, history, and downsides/upsides...
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By mmgood
Hey people
Question for all, just picked a 1986 bayou 300 thinking of going synthetic any thoughts ?
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By Arctic Snowdog
Hi Guys,
I have a small Sled Dog business and I train up to 14 Huskies pulling a Yamaha Grizzly 550, that is quite a lot of Horse (Dog) power. Sometimes in order to make the ride smoother for Dogs and us we ride in Neutral but on a few occasions I have noticed that the right hand (front) brake seems to loose pressure and does not brake at all. Is there a particular reason for this ? Is it a fault or is it something to do with us riding in neutral, I only use the ATV in this way a few months a year before the snow comes but I am sure I recall the same thing happening last season.
Any ideas would be greatly appreciated because I am a far way from being a mechanic.....
Have a super day and thank you all.
Craig
Lapland
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By Wiktorix Gameplays
Can I use an old snowblower engine in my 90cc quad? The old one blew up.
Thanks for the help.
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Similar Topics
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By Stephanie Webb
I have a 2000 500 quadmaster lta an just rebuild the gear box an my high gear is like nuetral will not move but all other gears move nothing looks broke just need some help cant figure out what gear that would be or if it could be the shifter fork
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By texaskaw
fighting this thing for a month now.No spark at plug.
New ignition coil,pick up coil,stator,reg/rectifier,all new wiring.Started it up today rode for an hour shut it off.Tried to start later wont start.pulled plug wire it firing a blue spark while starter button is pressed.Tried new plug no change. It stared a couple times an ran for few seconds then died.Will CDI act this way? The reg/rectifier get pretty hot is this normal?
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By fortininers
Hi all,
just bought a 2005 Yamaha Kodiak 450. Was curious about any major issues Some of you might of had. Will be using in winter conditions with a snow plow.
thanks!
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By David Land
I have an 05 King Quad 700 that has in the past had to have the stator replaced twice. For the past six months it has been down hard as I cannot get it to fire. I have replaced the coil (which is the code that came up) and now I have a friend replacing the stator. I want to see if the new stator does the trick. Drain the old fuel, and replace with 100% Ethanol free fuel, and see if that does the trick. The local Suziki dealer will not work on it as it is over 10 years old. So the nearest dealer is 90 miles away. The last thing I can do after that (provided the other fixes do not work) is replace the ECM/ECU. I also read that there was a recall on the ECM/ECU, so I need to check on that. All of the grounding has been checked, so if anyone has an idea, I would greatly appreciate the insight.
Kindly,
David
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By JacobSlabach
i know this isnt an atv but same type of thing. I have a riding mower im fixing and selling for my aunt and it has a dead battery. i jumped it off my atv and when i turn the key nothing at all happens. i tried jumping the relay still nothing. this is with the seat down. you wouldnt think this mower would have issues as its a top-of-the-line brand and almost brand new (aunt found it for a good price, still got tits on tires, just sat for a couple months in a mechanic shop
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