Adjusting power valves

800,

I wouldn't do it any other way but "without" it. Doing it without the tool may be more time consuming, but it virtually gurarantees the postion of the valves when the servo opens. If you use the tool, you'll never really know if it's putting the valves in the correct position. Only by taking off the exhaust manifold will you know. While you could use the tool and take them off to verify, this defeats the need for the tool.

Do it without and save your dough!

Jon
 
with the tool is alot faaster , you can pull the pipes off , hook up the tool then adjust the valves , with out the tool you need to fire up the sled , idel it down under 1000 rpms and you should hear your servo motor turn over then kill the sled , pull the pipes off and the manifolrd off , with your finger reach into the front of the cyl. and feel where the valve is on the cyl. wall , it should be flush with the top of the port , if it is not adjust the wire up near the servo motor to get them flush , you might also want to mark with a marker where wide open is , so next year you can just line up the marks and adjust them , i guess now that i read this , it takes about the same amount of time , either way make sure the pipe comes off and feel in there with your fingers to make sure the are flush ....good luck

ecopter , even with the tool , the instructions tell you to take the pipes off and adjust by using your finger as the guide to get them flush ....
 
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When you open the powervalves by idling under 1k you don,t get a "true" indication of full open. The only 100% way is by a tester & do it that way.
 
B2SO,

Didn't know the instructions directed you to do all that. Turk, never had a problem adjusting them that way. I always took the servo cover off, marked the position and if you try turning the servo anymore (further open), it really won't go any further; therefore it's pretty much open as far as it will go. So, it was quite accurate as far as I'm concerned.

Jon
 
again buy a service manual and READ it cover to cover both ways are accurate runnuing the motor will put it in the exact same spot as the tester will if the tester put it in a different spot than running the motor when you took the tester off and started riding the sled the valves would be in a different spot running the motor puts the valves where they will be when you ride the sled more like real life conditions commonsense
 
Well I just read the service manual and it only indicates one way to do it so I guess that the way I'll do it as I always have. I guess there is the Factory proper way and the cheaper way that may work. Also, if you look, that running it under 1000 is just to cycle the valves and check for a code on a pre-season inspection. Page 2-15 thru 17.
It doesn't tell you to use this procedure at all for valve adjustment.

Not to mention, if I was putting an engine in a sled, I would then put the engine in, assemble everything, run it, and then pull the pipes back out after it cools down, adjust the valves, then reassemble it, and start it back up and readjust the idle, I wonder if that would be quicker than just adjusting the valves before I put the pipes in the first time??????
 
I repect your feelings to do something as stated in the book, however the initial question was whether or not this could be done without the tester. The answer is yes. There's more than one way to skin this cat (no pun).

Also, if one were to do everything exactly by the book, then the dealerships would be mighty busy since it states in just about every manual shipped with the sleds that even the most basic maintenance should be done by the dealer; oil changes, suspension adjustments, rejetting, etc....

Sledders have to be flexible and somewhat wrench smart. If not, you'll be spending a whole lot of money.

Jon
 
And if we did everything "By The Book" there wouldn't be much need for this site other than to sit around and look at each other like a bunch of monkeys... Mr. Sled is cute... but not that cute...

Get off the "buy the manual, and do exactly like it says" kick... cause that sure hasn't been what's made this site great
 
I never read the book on this one because I don't do it by the book either, I just opened the book because someone mentioned something it said that I didn't believe. It doesn't tell you to check the valve adjustment by sticking your finger up the exhaust, but obviously we ALL know that its the best way to verify the adjustment. Yamaha's engineers must have waisted alot of time incorporating a system into the sled to cycle the servo without running the engine, why would they do a thing like that???????

There's many ways to do many things, some redundant, some waist valuable time.

It all comes down to having the right tools for the job.
 
the reason i say to buy a manual and read it is so people gain knowledge of how their sled operates and accurate specs when it comes working on their sled would you rather do the job right the first time or do it several times.most of the questions asked on this web site can be answered either by reading the manual or going to the tech section of this site.look at most of the questions asked and how many differant answers they get for the same qusetion not all the advise can be correct.then there is the question of lieability when someone gives out the wrong answer and someone starts blowing up expensive parts.who pays for the parts? the person who gave out the wrong advise.if you had the work done by a shop you would definetly be demanding for them to pay for their misstake.how does one hold someone accountable on a web site.after all the advise is being given out without even physically seeing the sled to even diagnose the problem properly.therefore is it wrong to suggest to people to read and learn about their sled before they go to work on it.yes there are ways to repair things other than how the manual says to do it.some of them right and some wrong but if you are knowledgeable about what your working on you can seperate the right advise from the wrong.that in formation is in the manual.it is good to have a web site like this to learn more about our sleds.i have learned alot from this web site the main reason is i have taken the time to read and reread the tech section and my manuals.there are somevery smart people on this web site who do give out good advise.the reason i know their advise is right is because their answer is the same as the manuals.in the same token there are people who give out the wrong answers and reading and gaining knowldge will help someone distingwish the diferance and hopefully not make costly misstakes thanks for lettng me express my opinion
 
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