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How do i adjust the throttle screw on carburetor of yfz 450

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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

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Where is the mixture screw on the carburetor for a 2005 honda trx500tm

Hey Jason,
First,,WHY do you need to know where the screw is??? Why are you going to adjust it... it only controls the " idle to 1/8 throttle" part of your running engine... Is your engine is starting to run rough?? Please reply to me on here..I'll help you..

Jun 30, 2017 | ATVs

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What would cause my yfz 450 not too have any electric power at all, no lights come on , tried to jump the selanoid n all it does is crank over but doesnt it start??? Any idea why or what the problem is???

There is a good possibility that your main fuse is blown. The main fuse is located on the solenoid. There also should be a spare fuse that is stored on the solenoid, however, if it's blown, something has shorted to cause this, and needs to be found. An important note, if the battery has been hooked up with the polarity reversed, that will blow the main fuse.

There's also a possibility of a bad connection at that fuse, or in the plug that connects the solenoid to the harness. If this is the case, it would just need a little cleaning, or replacement of the whole solenoid.

Oct 29, 2014 | Yamaha 2006 YFZ 450 SE

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2004 yamaha yfz 450 manual

that is the oil pressure line for the heads oil delivery.
It should have a copper washer on the bottom and the top of the banjo.
and a bolt going through all three into the head.

Jun 25, 2014 | ATVs

1 Answer

How to adjust the carburetor on a yamaha YZF450R 2006

what are you trying to adjust? idle, air, fuel?? refer to shop manual for specific settings

Mar 03, 2014 | Yamaha 2006 YFZ 450 Bill Ballance Edition

1 Answer

Will every thing off a yzf 450 2005 fit on a 2006 frame

no the entire rear suspension is VERY different

Mar 02, 2014 | Yamaha 2006 YFZ 450

1 Answer

2004 yfz 450 (ATV)

Remove and clean the carb

May 20, 2013 | ATVs

1 Answer

Valve clearance adjustment might have a service manual posted with that info. yamaha also has owners manuals free for download but not sure if they'd cover that.

Apr 26, 2013 | Yamaha 2008 YFZ 450

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