I would like some info on how power valves work..... i see three wires going down to the PV's one for each pv going to some type of box just behind the secondary. what is this? I was watching a you tube video of a guy riding his srx and he stated in the message post that he had no idea his PV's were not working during the ride.... wouldn't you notice some type of lack of performance? because its probably a rare occurance for them to just stop working eh? i think this fall i will have them cleaned with my winterizing package along with the chain case oil being changed and what not..... the pv's should be cleaned annually right?

thanks

http://www.yamahaaccy.com/parts.aspx Try this webpage, it tells you everything you need to know about any sled. I use this with all my srx and wifes 700 v-max troubles. Hope this helps.