Question about 2004 Yamaha YZ 250 F

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Worn seal behind impella of yz250f yamaha

Impella and nut all cast as one. how to lock motor to unscrew impella

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Take the water pump cover off, not the entire clutch cover. The water pump gear is driven by the primary drive gear on the crankshaft so you can put the bike in gear, stand on the brake and loosen the nut. I believe the impeller may be reverse threads. I'm not 100% positive of that.
You can also use a 3/8" air impact wrench to remove it.

Posted on Jan 03, 2009

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Posted on Jan 02, 2017

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