There was a Yamaha service bulletin on the 1997 sleds with high oil consumption, but horkn, I highly doubt you would get the pump replaced free now.
My 500 was not within the serial number range of sleds with bad pumps, but had high oil usage. The pump was replaced during the 3 year warranty period. Now the replacement pump has also worn, and the sled is taking an obscene amount of oil. The consumption had been getting higher for some time, but I did not do anything about it because the sled has had engine problems and I figured the extra oil would be added insurance. But I need to do something now because it has gotten ridiculous.
I have not heard of the other brands of sleds having this problem and as far as I have known them over the years, the Mikuni pumps have been very reliable and trouble free.
Anyone have any more information on why the pumps on some Yamaha's do this?
As far as I can see, the plunger in the pump would be the only part that would need to be replaced. Ding, where do you find parts for the pump?
If I had the equipment, I would weld the plunger nipple up and turn it down to shape. The idea would be to use a type of rod that would not wear like the original metal does.
And yes, the 2 cylinder 500 and 600's from 1994 -on, drink a lot of gas and oil, even when the oil pump is working like it should.
Back again guy's.Here's a question for you gear heads.The oil adjustment on Yamaha sleds(600 venture)calls for 22-24mm in between the sleeve to the adjustable part.Now if you guy's can answer this great,the question bieng is,when you decrease the space(cable length)does this increase the stroke on the pump thus increasing the amount of oil bieng pumped,also if you increased the space to (24mm)does this decrease the stroke thus decreasing the oil output!The reason I need to know this is because there is no markings on the pump to line up to even if you could because you can't see squat down there as anyone knows.And to keep track of oil consumption after driving forget it that doesn't work it's not like driving on a freeway with a car or truck,to many variences.I've noticed that my cable setting is at 22mm,the spark plugs have a very oily black film around the threaded part before the insulator,but the plugs themselves are a nice tan-brown colour,also while the sled is warming up it smokes like crazy, even when I take off there's a huge cloud of smoke (to much oil)plus I can smell it on the trail.Anybody know or played with this let me know!KAPUSTA>>>>>>
OH tripplec;at least you know names.Now how about that sled,I need to know if you have or had a problem with her smoking when you start it and being generally stinky. I know guys have said try Yama- oil, I use shell advance as the fellow before me had.Also on the adjustment of the cable no book tells you what the difference is in when you lengthen or shorten the cable.I've been trying to work on the part throttle because I get lots of smoke and burbling on the trail.
GOD DAY guys'.Thank's again you all hit the topic sqaure on the top.I got to talk to a (TECH),and yes he covered all the bases.Like you guy's mentioned larger gap in the oil cable(less oil) maxx 25mm.mine was at 23mm.!Floats were sitting at 13.5mm fuel level was probably to high, put the setting at 15mm.lower fuel level in the bowls.Also with the pilot jet,I changed mine to a #40,he recommended turn FUEL screw out 1-3/4,2 turns out.So all i can do is giver a try and you know what this will probably work!!!Most dealers won't tell you much as they want you to bring your sled in to there shop.Thank's guys'....... KAPUSTA.......
