Finally cleaned the power valves, should it sound louder?

yahadriver23

yahadriver23

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Apr 11, 2004
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Finally cleaned my power valves on my 02 viper after 3 thousand miles. The orginal owner i dont think ever cleaned them. They were very gunked up and i cleaned them very well, and they look like new. It seems that it doesn't idle as good or sound as smooth as it did before. It idles fine, the rpms dont jump, but it sounds louder and more like a twin then a smooth tripple. Do the valves need adjusting now? or is this normal. Thanks ;)!
 
When I cleaned mine, and was adjusting them I messed up the adjustment so that it my valves were open all the time and the check engine light was coming on and it sounded alot like your problem...just choke your motor out and make sure your servo is in open position and adjust from there...its better to do this a couple times just to make sure they are correct
 
So what your saying is that one of the valves might be stuck open at idle, when they should usually open up at a higher rpm right. I know that there has been many posts to adjust the valves, but i couldnt' find any on the tech pages, is there a forum that i should be looking in? thanks
 
if you use the choke to kill the engine, the valve controle computer will open the valve near the end to try and keep it running. now that it is set open, you can adjust them flush to the top of the exhaust port. at least thats my understanding of it.
 
Ypvs

Try these two links
http://www.totallyamaha.com/snowmobiles/aaTECH/YPVS/YPVS.htm
http://www.totallyamaha.com/snowmobiles/aaTECH/Exhaust%20Valves%20(1).htm
Now if your viper is battery equiped then just turn key to on with servo cover off and you can see if all the cable(s) draw in the valves and start sled then shut off sled and see if the valves return, if not there will be a loose cable identifying the stuck valve.
If not battery equipped then turn you ideal down to bellow 1000-900 rpm with engine running and the servo does a cycle as a means to remedy the problem chocking it self out due to a drop in rpms.
Now that you determined witch system you have it’s time to adjust your valves, others here on T.Y. will debate this but this how I do it and it works for me. Before you begin the servo has to be at full open, buy either system ( Battery type Just turn to on OR batteryless turn idle down ) you then index the open position with a marker Any point on the cable drum to the back of housing. Remove you exhaust pipe and then your “W” pipe at the cylinders, now with the servo holding the valves open reach inside the exhaust port and feel for the valve, they should be flush. Adjust cables as necessary. Then, your done. Do not start engine until you put back the exhaust “W” and pipe, I use a hi temp silicone on the gaskets to ensure no leaks.
Just a side note did you clean the PYVS housings this is the part the valves are attached to, they get gummed up as bad as the valves do, also under them is a drain hole, make sure it’s not blocked. Inspect your valves as the cable has a way of pulling through the eye, the cable is attached to as well as some cables can stretch beyond adjustment rang or a broken cable.
Good luck and post back your findings and results please…
 
Yeah i have the ER so it's got a battery, i'll take the cover off it and see if they are pulling themselves back out or not. Like i said before i just pulled them out and cleaned them and put them back in... All i did was Take the 4 allen head screws out and clean them with them attached to the cable and i didn't try ot move them around. I have only gotten around to cleaning 2 out of the three but i dont think that should make a difference
 
ypvs

yahadriver23 said:
Finally cleaned my power valves on my 02 viper after 3 thousand miles. The orginal owner i dont think ever cleaned them. They were very gunked up and i cleaned them very well, and they look like new. It seems that it doesn't idle as good or sound as smooth as it did before. It idles fine, the rpms dont jump, but it sounds louder and more like a twin then a smooth tripple. Do the valves need adjusting now? or is this normal. Thanks ;)!
Click to expand...

how are you doing, have you had time to finish them and test out...please post back your results as it is informative and it also lets T.Yers now you worked out your problems...thnks
 
I wont be home till saturday... thats what happens when your at college! But i'll let yeah know, i dont wanna rush anything with it, i wanna find a day when i can just sit down and figure it out.
over n' out ;)!
 
Yeh, know what you mean...I am doing a engine rebuild, not rushing it either...A little tip here when you sit down make sure you have a few beer(s) it helps with anger control...LoL...good luck
 
theblues said:
Yeh, know what you mean...I am doing a engine rebuild, not rushing it either...A little tip here when you sit down make sure you have a few beer(s) it helps with anger control...LoL...good luck
Click to expand...


hhaha very true same thing here..nothing like a molson ex
:2strokes:
 
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