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I received a Yamaha warrior three fifty I'm not sure what year can't find ID tag anyways starts and runs great Only problem is when I am accelerating harder than normal or all the way there is an extremely loud knock from the left rear I can let off and it will stop I can accelerate normal and top out no sounds I can gear down still no sound just hard acceleration the chain has slack enough to move roughly one to two inches Its either rear of motor at output shaft or back axle first ATV Ive had ever make this sound Also when accelerating and it starts knocking it slows down dramatically like a chain skipping teeth Im really not sure what going on Any help here would be appreciated

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Check your front sprocket for missing teeth. I have broken all of them off and it would only slip at times making a horrible sound and I have also had every other tooth go missing. This is all due to a wore out chain. You need to check you chain for wear by pulling it away from the rear sprocket. If you can pull it away from the sprocket and see a fair amount of space between the teeth, replace the chain. Also both sprockets at the same time. Repost another question if more problems

Posted on Apr 21, 2014

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Posted on Jan 02, 2017

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SOURCE: Loud ticking/knocking/rattling sound when I start/accelerate

hi is it miss-firing as it sounds like a knocking noise can be anything but if you can feel it on the accelerater pedal then the noise sounds like its on the inlet valve side which would transfere the noise up the throttle body where the accelerater is located it could be something as simple as a tappet come loose to a burned valve you need to have a look do a compression test and take the rocker cover off see if theres anything come loose yates210456

Posted on Oct 13, 2008

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SOURCE: Rough idle, Car shakes, sputters and misfires upon acceleration

It sounds like you may have a problem feeding the fuel to your engine, I had the same problem with my 89 RS. All the 1989 model's fuel systems were recalled. I think you may need a new fuel pump. The fuel pump is located inside the gas tank in the rear of the car right under the rear axle. The fuel pump itself isn't too expensive, but with other small parts such as the electrical harness upgrade and fuel filter and the labor you should be looking somewhere in the $500 range. I hope this helps.

Posted on Jan 12, 2009

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SOURCE: Engine knock when going uphill +...

Oil pressure might actually be a bit high for idle. High or low oil pressure in an older engine tends to be indicative of some serious issues. Oil pressure that is too high tends to be a clue that you have serious carbon build up. That aside, have you tried running a higher octane fuel, or perhaps adding an octane booster to your normal grade? Pinging can become knocking in a badly worn engine. One recommendation: At your next oil change try substituting a quart of marvel mystery oil or lucas engine oil treatment in place of one quart of your normal oil. Both have some pretty good track records for helping to free up sticking valves and break up carbon in older engines. I'm an old timer myself, and I personally swear by Marvel for older engines. There is no "rebuild in a can" but Marvel comes close. Give those a shot, let me know what happens.

Posted on Feb 06, 2009

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SOURCE: 96 Golf 2.0GTI 8v knocking noise from rear when accelerating

its probably your bump stops. the vw ones are very soft. i bought ford escort (the shape after the xr3) ones and cut them a little down to fit. i think the noise is either your shock touching or the sound of the tire scraping the body of the car. hope this helps.

Posted on Mar 26, 2009

  • 167 Answers

SOURCE: Loud Ticking sound 2004 F150

Check the Alternator / Powersteering belts .
One of them will be damaged and loose.
Hope this helps.

Posted on Aug 01, 2009

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