Adjusting power valves

B

billbies

New member
Joined
Dec 5, 2006
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158
Age
42
Location
Grand Rapids,MI
New motor build and I have to readjust the powervalves how do I do this as I completely took them apart to check and clean and now I put them back together but I have to adjust them to work correctly

Thanks


Bill
 

This is from the Tech section. Theres a lot of good info there when you need it.

http://www.totallyamaha.com/snowmobiles/aaTECH/Exhaust%20Valves%20(1).htm

Sorry, you may have to cut and paste it to your browser. Not sure why its not showing up as a link?
 
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Search for power valve in the search forum, Or if you have a service manual it will show you how to properly adjust your valves, and the cables,
Just requires time and patience, I use 2 3mm allen wrenches, as a guide when adjusting, Some take the exhaust off and feel up into the port for adjustment... I have always done mine according to yamaha.
 
Daman: could you explain further how do I do this?


Also where exactly do i adjust my oil pump to 19mm-21mm right above the carbs at that spot?


Im so back A$$ word with this thing right now I cant think straight



Please help


Bill
 
what you got to do to adjust your power valves is you take the cover of you power valve servo wich is 3 phillips screws, start your sled and turn the idle down below 1000rpm's and until you see the servo open the power until the servo stops then turn sled off and make sure the servo is still turned all the way. Then take the 2 allen key bolts at the end of each power valve and pull the end until it stops. what you got to do know is mesure that gap to make sure its 2 to 3mm. Which is about a coat hangner thick. if there is more than 2 to 3mm then what you got to do is adjust the cable in or out at the servo motor which is a 10mm nut. try that
 
billbies said:
Also where exactly do i adjust my oil pump to 19mm-21mm right above the carbs at that spot?
Click to expand...
there will be a bump like area in the cable you need to pull back the two
rubber halfs to get to the adjuster,then adjust.

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