None turbo guys what fuel are you running?

[Alpha]

I assume my sled came with 87 and when i picked it up. Even the sticker says 87 I switched to 91 or 93 after the first tank. I noticed that it did not back fire as much and I also started to blurp the throttle every time I slowed down and when I did that it did not backfire anymore.

It also started allot better on warm starts. It seems this engine/ecu is pretty sensitive to fuel. I filled up in a blizzard and got just a tiny bit of snow in the tank. Well it ran like #*$&@ until the next fill up.

With so many having these issues and electrical issues and reading that our sleds might have a sensitive electrical system I wonder if i'm problem free because of the fuel and I plug it on the trickle when its not ridden?

 

[STAIN]

2400 miles, almost all have been on 87

 

[Studroes144]

2025 miles on the sled..1800+ have been on 87 octane

 

[bleedyamaha]

87

I always run 87. I never use kill switch and always let it idle.down before I shut it off. To start I always turn key a let it cycle than turn key until it starts.

 

[MADDOG24]

1,700 miles with 87 . My last fill up of the season will be 93. I try to run non ethanol when I can.

 

[Nytro40th]

87 on this viper and 87 on my nytro

 

[RXVIPER]

Ran 87 but 91 the motor seems smoother and doesn't backfire. Running 91 from now on, don't care what the manual says.

 

[bottlerocket]

Why is it back firing?

 

[yamaha1973]

87

 

[TD Max]

Maybe some clarification on when it backfires?

After shutdown, during decel, etc.

 

[cannondale27]

X2 backfire on acceleration is more than likely the rev limiter.

87oct 3200mi no backfire ever.

 

[christiansenkt]

93 since purchase..

 

[RXVIPER]

Why is it back firing?

did it a couple of times on fuel that I got from a gas station other than petro-Canada or esso , tried 91 oct and right away the motor felt smoother.

 

[RXVIPER]

Did it during decel.