YFZ 450 oil pump mods

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Old 12-13-09, 11:20 AM
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YFZ 450 oil pump mods

Do anyone have info on 05 450 oil pump mods. thanks
 
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Old 12-13-09, 04:48 PM
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I have to ask Why do you want to modify the oil pump??? Do you have no oil pressure???? I'd be afraid of siezing the engine if the mod went wrong... To be safe I'd replace it with a new one if there's a problem with it.. Roger
 
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Old 12-17-09, 09:06 PM
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The easy way is to buy the '07 and up high flow pump and squirter....
 
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Old 12-17-09, 09:19 PM
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The '04-'06 yfz don't have enough oil going to the underside of the piston... Theres an oil squirter and oil passage cast into the cast for both quad and the dirtbike. But only the dirtbike is it drill out and functional... you can do the oil mod to the case by drilling a 1/32" hole behind the oil filter and end of the oil passage, you also have to machine out a o-ring in the passage between side case and the case.... The is a pretty big job... I was complete rebuilding my motor when doing this... And pretty much have to split the motor....
 
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