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I have a honda trx250te atv it starts and runs full throttle

It starts and runs wide open

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Yamaha yfz 450r atv 2012 model start but don't have power to ride.


Hey Brighette
Its time to check a few things.. First - remove the air filter and see if it runs ok then... if not... have the carburetor professionally cleaned and set... does it run ok now? .. have you installed a new spark plug? .. do that.. if it is still not running ok.. time to check the compression using a compression gauge that screws into the spark plug hole...

Innova Compression Tester

Your engine should pump at LEAST 120PSI. Once you have screwed the gauge in and lightly seated the o-ring.. turn the engine over for at least 5-8 seconds with the throttle WIDE OPEN... 120psi. minimum... if you are not getting very very close to this.... its time to find out why??... it might be that the valves are too tight... but find out why?... this is probably the reason it won't run..

Aug 12, 2017 | ATVs

1 Answer

My atv-t013 engine runs but doesnt have enough power to move.


hey Nick,
this sounds serious... make sure its NOT drive line related first..(chain or drive shaft).. see if it will roll in gear?? ..It shouldn't..(or be extremely hard to push).
then check the compression of the engine... it should pump to around 120PSI with the throttle wide open. Once you have confirmed the compression is good ( I have a feeling its the core of the problem ).. once you have done this... reply/repost on here..

Jul 31, 2017 | ATVs

1 Answer

2016 Arctic Cat ATV 450, gets fuel and spark, won't start. tried new spark plug, fully charged battery, no codes, only has 230 miles on it


Hey Mad Bear, check the compression, you should get 120psi + minimum,,, hold the throttle wide open and spin the motor for 5-8 seconds... reply on here with results,, thanks

Mar 27, 2017 | ATVs

1 Answer

Why doesn't it restart?


Hey Heather,,,

Sounds like the throttle position sensor is bad. It won't let the engine start while it is "sensing" wide open throttle. This is something for the repair shop... 70 miles.. Warranty???

Feb 18, 2016 | Polaris 2014 Sportsman 570 EFI

1 Answer

Won't start was running but won't start after changing spark plug


try putting the old plug back in and see if it starts. If it does, check the gap on the new plug, if it is too tight or too wide it won't work. Check for a spark by holding the spark plug (connected of course) to the cylinder head and turn the engine over. Do you see a fat blue spark. If not, the plug is faulty.

Oct 24, 2015 | Polaris 2005 Phoenix 200

1 Answer

Why does my ATV bog down and die when I keep the throttle wide open?


If you are lucky, you might just need new fuel filter and the fuel bowl cleaned out, and maybe new air filter. If not so lucky you need carburetor rebuilt. Backfire is usaully caused by engine running too lean ( too much air for the amount of fuel present). Fuel bowls get gunk in them and the fuel needles and fuel jets get varnished up. The accelerator pump gets worn out gaskets and/or bellows and doesn't give the right amount of fuel mist when you accelerate.

Full Choke is indicative of a motor starved for fuel

Mar 04, 2015 | ATVs

1 Answer

Why is my carb bogging out on acceleration?


check the air filter or try running it with the lid off the airbox

May 04, 2014 | ATVs

1 Answer

1998 Polaris Explorer 300. Could you please tell me what the compression reading should be? I turns over but wont start, will start if boosted but dies out when you let off the gas. Before all this started...


Hey Ang,
Just from what you have told us... this seems a little more complicated than simple... Does it only run wide open? ...Has anyone been "working" on this atv...?? IF they have been working on the carb, you may have put the slide in incorrectly...there is a groove down the side of the slide and a pin in the carb the groove runs on...
1. Compression should be 120PSI...or more, with the the throttle held wide open and kicked over 5-8 times.. The carb may need to be professionally cleaned and set...(take it to a qualified professional)...do this and reply to me..

Jun 23, 2017 | Polaris ATV

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