srt842
New member
Can anyone explain why Yamaha markets the Viper as having Self-Cleaning Power Valves? A lot of folks are spending a lot of time cleaning them.
ya when the said self theu ment you are gonna clean them yourSELF......
BlueMachine
New member
I believe there is a hole on the bottom of the powervalve assembly that releases extra unburned fuel right after startup. That might be the "self-cleaning" feature. It helps, but doesn't solve the problem.

staggs65
Moderator
too funny...and trueya when the said self theu ment you are gonna clean them yourSELF......

staggs65
Moderator
the cycle at startup is the supposed "self cleaning"
daman
New member
staggs hit it....
all self cleaning is is every time you start
your sled the servo cycles the valves open and
closed to keep any carbon on the valve wore off..
you still need to pull them out and clean thoroughly by hand..
all self cleaning is is every time you start
your sled the servo cycles the valves open and
closed to keep any carbon on the valve wore off..
you still need to pull them out and clean thoroughly by hand..

super1c
Super Moderator
staggs65 said:too funny...and true
This gave me a laugh too. I wasnt laughing when i spent the better part of the day covered in solvent and grime when i was doing the first clean on my new to me vipers!!!