Oil consumption 94 v-maxs

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n8sjh

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Jan 28, 2006
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Grand Rapids Michigan and Kalkaska Michigan
Went out yesterday and decided to check my oil consumption on both machines. Both 94 v-max. I adjusted cables to the biggest gap on the cable. Well in a 50 mile ride which is about 5 gallons of gas it went thru 1 qt of oil.
Too much?????
Should i start adjusting the oil cable out a little more every ride?
Or is the pump going bad?
 
50:1 ratio = 3.2 oz per gallon of gas. a lil more or a lil less is ok. looks like your at 25:1. thats way too much oil. should be about 1 qt per 10 gallons of gas.
 
Thats what I thought. 1 qt to 10 gallons. I am going to adjust the cable out and see but looks like the pump may be shot. Is it ok to just premix the gas and oil? Do I need to disconnect the oil pump if i premix? I will replace it later because I know they are around $200. I just want to get as much riding in this year as I can.
 
try adjusting the gap more on your cable,i don't think '94's had a issue,open
that gap more.try 30mm.

set throttle end play first..
 
The 94's were rich from Yamaha, somewhere in the 20:1 range. Have a look at the Service Bulletin Snowdad4 mentioned.

I think bender or aaen had an oil pump mod back in the day that entailed plugging the port in the oil pump and re-drilling with a smaller hole to reduce the amount of oil use. My Teflon coated memory may have miss remembered some of that. :)
 
Thanks guys. I will look into the service bulletin. I will also play with adjusting the cable out.
I did set the throttle cable already. I am also tring to get my jetting better so went thru all the things that the service manual said to check and set. Thats what got me on the oil cable.
 
I do know our '94 liked oil when we got it(brand new) after tweaking on the pump we got down to a reasonable amount,never replaced the pump..never
any issues,just retuned..
 
procedure had to deal with alignment marks on the pump. and then cable adjustments to offset alignment marks. dont play with it too much, "you can run out of gas alot, oil, once". dont know why i saved this info but i found the notice last week while looking for some stabilizer parts. sorry, no specifics. havent had that sled for years.
 
My pump was pouring too much oil in and got tired of worring about if i had enough oil or not enough so i cut the oil line pluged it with a bolt and put a clamp around it and now run premix.

Alot easier than worring
 
#1. with the engine off, hold throttle wide open, align the oil pump lever mark with the index mark on the pump, using the pump cable adjustor. #2. release throttle and measure the cable freeplay. #3. increase the cable freeplay by turning in the adjuster 2 turns (2mm). tighten the locknut. #4. check the alignment mark at wot. the lever mark should be 0.6mm before the pump index mark. #5. recheck and adjust as necessary to achieve #4.
 
n8sjh said:
Well I am going to try and get it down some. If not I will premix until I figure out what the deal is. I need to call a dealer and find out the specifics on the notice. Want to get it right first if I can.
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I think it would be better to have it use some more oil for a time than messing with unhooking the pump and premixing. It has already been like that for awhile anyway right? Especially if you are not going through a lot of spark plugs. The extra oil will only be better for the engine.
 
daman said:
And who told you this procedure??
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straight out of my official '95 technical update manual supplied by no other than yamaha motor corp. you question this why? ive been cleaning out some old stuff and ran across it. did you see the above posts as to the service bulletin? someone on here was looking for some 94 stabilizer parts and i opened up an old box of parts and info from when i had the 94-96 vmax sleds. sorry i dont posess the capabilities to scan and post like you do, just thought i would relay the info i found. give me a fax # and i can send you the text, i know how work those things(copiers and fax machines). i have owned most model yamaha two strokes from 83 to present, riding since the early seventies, have an awesome relationship with the local dealer and have acquired alot of info over the years. you hit a nerve, rant over.
 
snowdad4 said:
straight out of my official '95 technical update manual supplied by no other than yamaha motor corp. you question this why? ive been cleaning out some old stuff and ran across it. did you see the above posts as to the service bulletin? someone on here was looking for some 94 stabilizer parts and i opened up an old box of parts and info from when i had the 94-96 vmax sleds. sorry i dont posess the capabilities to scan and post like you do, just thought i would relay the info i found. give me a fax # and i can send you the text, i know how work those things(copiers and fax machines). i have owned most model yamaha two strokes from 83 to present, riding since the early seventies, have an awesome relationship with the local dealer and have acquired alot of info over the years. you hit a nerve, rant over.
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by the way, that was a sevice bulletin for the 94 600's, titled "excessive oil consumption" pertaining to vx600u, dxu, stu.
 
back the train up.....

snowdad4 said:
straight out of my official '95 technical update manual supplied by no other than yamaha motor corp. you question this why? ive been cleaning out some old stuff and ran across it. did you see the above posts as to the service bulletin? someone on here was looking for some 94 stabilizer parts and i opened up an old box of parts and info from when i had the 94-96 vmax sleds. sorry i dont posess the capabilities to scan and post like you do, just thought i would relay the info i found. give me a fax # and i can send you the text, i know how work those things(copiers and fax machines). i have owned most model yamaha two strokes from 83 to present, riding since the early seventies, have an awesome relationship with the local dealer and have acquired alot of info over the years. you hit a nerve, rant over.
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No,no i was just asking thats all,interesting. :)
 
Yup Snowdad4 is correct. I went to the dealer to get the info. Thought I was not going to get it because they asked when I had the sled in for service and I told them I have never had it in there. He said he could not look it up unless it had been in there for service. Then another guy at the counter heard me and said he would find out the info. A few minutes later he handed me 2 pages on how to set up change. It is only another 2mm on top of the original cable adjustment. I will try it and see but still seems like not enough but we will try it.
Also Yamaha puts these on line for the dealers but only goes back to 95 so the guy at the counter was smart enough to go ask a mechanic and he had a book with all the bulletins.

I will get back after the weekend and let you know if it worked. Thanks Guys
 
n8sjh said:
Yup Snowdad4 is correct. I went to the dealer to get the info. Thought I was not going to get it because they asked when I had the sled in for service and I told them I have never had it in there. He said he could not look it up unless it had been in there for service. Then another guy at the counter heard me and said he would find out the info. A few minutes later he handed me 2 pages on how to set up change. It is only another 2mm on top of the original cable adjustment. I will try it and see but still seems like not enough but we will try it.
Also Yamaha puts these on line for the dealers but only goes back to 95 so the guy at the counter was smart enough to go ask a mechanic and he had a book with all the bulletins.

I will get back after the weekend and let you know if it worked. Thanks Guys
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adjusting the marks a few mm's before the index marks are lined up is doing the same thing,that TSB is just a technical way of doing it...witch is fine
keep us posted.
 
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